Boards

Archive-name: sun-hdwr-ref/part3
Posting-Frequency: as revised
Version: $Id: part3,v 1.11 1995/08/27 19:19:15 jwbirdsa Exp $

                       THE SUN HARDWARE REFERENCE
                     compiled by James W. Birdsall
                        (jwbirdsa@picarefy.com)

                                PART III
                                ========
                                 BOARDS

BOARDS
======

   This section covers the various circuit boards which make up or are
used with Sun systems. This includes: CPU boards/motherboards; memory
boards; video boards and video accelerator boards; SCSI controller
boards; non-SCSI disk controller boards such as SMD and IPI controllers
and boards used to connect non-SCSI disks to SCSI busses; non-SCSI tape
controller boards such as those used with 9-track tapes; Ethernet boards
(boards for systems where Ethernet is not integrated into the
CPU/motherboard and boards providing second, third, etc. network
connections for systems with integrated Ethernet) and boards for other
networks such as Token-Ring and FDDI; communication boards, including
serial, parallel, synchronous, and X.25 boards; floating-point and other
system accelerator boards; cardcage backplanes; and boards not covered
by the categories above. The first subsection is a brief listing of
boards described in the rest of this section, sorted by bus type
(Multibus, VME, P4, ISA, SBus, MBus, XDBus, SCSI, None, Unknown).


    Crossreference by bus
    ---------------------

MULTIBUS
        370-0502 ? 0167 Computer Products Corporation TAPEMASTER
        370-1012        Xylogics 450 SMD controller
        370-1021        Sky Floating Point Processor
        501-0288        3COM 3C400 Ethernet
        501-0289        color video
        501-1003        monochrome video/keyboard/mouse TTL only
        501-1004        Sun-2 Ethernet
        501-1006        Sun-2 SCSI/serial
        501-1007        100U, 2/120, 2/170 CPU
        501-1013        1M RAM
        501-1048        1M RAM
        501-1051        2/120, 2/170 CPU
        501-1052        monochrome video/keyboard/mouse ECL/TTL
        501-1054        Multibus-VME adapter
        501-1232        4M RAM
        xxx-xxxx        Systech MTI-800A/1600A Multiple Terminal Interface
        xxx-xxxx        Systech VPC-2200 Versatec Printer/Plotter controller

VME
        501-1014        Sun-2 color framebuffer
        501-1020        2/50 1M memory
        501-1045        "Sun-2" SCSI host adapter, 6U
        501-1046        2/50 2M memory
        501-1047        2/50 4M memory
        501-1054        Multibus-VME adapter
        501-1055        gp graphics processor (accelerator)
        501-1058        gb graphics buffer (used with GP)
        501-1067        2/50 3M memory
        501-1074        3004 "Carrera" CPU 2M (3/75/140/150/160/180)
        501-1079        2/50 0M memory
        501-1089        cg3 color framebuffer
        501-1094        3004 "Carrera" CPU 4M (3/75/140/150/160/180)
        501-1100        3/2xx CPU
        501-1102        3/2xx 8M memory
        501-1116        cg3 color framebuffer
        501-1131        3/1xx 2M memory
        501-1132        3/1xx 4M memory
        501-1134        3/110 CPU
        501-1138        "Sun-2" SCSI host adapter, external
        501-1139        gp+ graphics processor (accelerator)
        501-1141        2050 CPU 1M (2/50)
        501-1142        2050 CPU 2M (2/50)
        501-1143        2050 CPU 4M (2/50)
        501-1144        2050 CPU 1M (2/130/160)
        501-1145        2050 CPU 2M (2/130/160)
        501-1146        2050 CPU 4M (2/130/160)
        501-1149        "Sun-2" SCSI host adapter, internal
        501-1163        3004 "Carrera" CPU 2M (3/75/140/150/160/180)
        501-1164        3004 "Carrera" CPU 4M (3/75/140/150/160/180)
        501-1167        "Sun-2" SCSI host adapter, internal/external
        501-1170        "Sun-3" SCSI host adapter, internal
        501-1199        4/1xx CPU 8M w/o FPU
        501-1206        3/2xx CPU
        501-1208        3004 "Carrera" CPU 4M (3/75/140/150/160/180)
        501-1209        3/110 CPU
        501-1217        "Sun-3" SCSI host adapter, external
        501-1236        "Sun-3" SCSI host adapter, 6U
        501-1237        4/1xx CPU 8M with FPU
        501-1267        cg5 color framebuffer
        501-1268        gp2 graphics processor (accelerator)
        501-1274        4/2xx CPU with FPC-6/4
        501-1299        3/4xx CPU
        501-1316        4/3xx CPU 8M
        501-1319        cg3 color framebuffer
        501-1381        4/4xx CPU
        501-1383        TAAC-1 system accelerator, POP board
        501-1434        cg9 color framebuffer
        501-1447        TAAC-1 system accelerator, DFB board
        501-1462        4/1xx CPU 16M w/o FPU
        501-1463        4/1xx CPU 16M with FPU
        501-1464        4/1xx CPU 32M w/o FPU
        501-1465        4/1xx CPU 32M with FPU
        501-1491        4/2xx CPU with FPU-2 2-hi backpanel
        501-1512        4/1xx CPU 8M w/o FPU
        501-1513        4/1xx CPU 8M with FPU
        501-1514        4/1xx CPU 16M w/o FPU
        501-1515        4/1xx CPU 16M with FPU
        501-1516        4/1xx CPU 32M w/o FPU
        501-1517        4/1xx CPU 32M with FPU
        501-1522        4/2xx CPU with FPC-6/4 2-hi backpanel
        501-1550        3/4xx CPU
        501-1656        4/1xx CPU 8M w/o FPU
        501-1657        4/1xx CPU 8M with FPU
        501-1658        4/1xx CPU 16M w/o FPU
        501-1659        4/1xx CPU 16M with FPU
        501-1660        4/1xx CPU 32M w/o FPU
        501-1661        4/1xx CPU 32M with FPU
        501-1686        4/6xx motherboard 0M
        501-1742        4/3xx CPU 32M
        501-1899        4/4xx CPU
        501-2055        4/6xx motherboard 0M
        501-8028        3/E CPU
        501-8035        4/E (SPARCengine 1) CPU 4M w/Weitek
        501-8058        4/E (SPARCengine 1) CPU 4M w/o Weitek
        501-8064        4/E (SPARCengine 1) CPU 16M w/Weitek

P4

ISA

SBUS

MBUS
        370-1388        SM100 SPARC module
        501-1889        SM30 SPARC module
        501-2218        SM20 SPARC module
        501-2219        SM40 SPARC module
        501-2239        SM30 SPARC module
        501-2258        SM41 SPARC module
        501-2270        SM41 SPARC module
        501-2318        SM41 SPARC module
        501-2352        SM51 SPARC module
        501-2351        SM51-2 SPARC module
        501-2358        SM40 SPARC module
        501-2359        SM41 SPARC module
        501-2360        SM51 SPARC module
        501-2361        SM51 SPARC module
        501-2387        SM51 SPARC module
        501-2431        SM52X dual SPARC module
        501-2444        SM520 dual SPARC module
        501-2445        SM521 dual SPARC module

XDBUS
        501-1866        SPARCcenter 2000 motherboard 0M
        501-2334        SPARCcenter 2000 motherboard 0M
        501-2336        SPARCserver 1000 motherboard 0M
        501-2362        SPARCcenter 2000 motherboard 0M

SCSI
        370-1010        Adaptec ACB4000 SCSI-MFM controller
        370-1011        Sysgen SC4000 SCSI/QIC-II controller
        xxx-xxxx        Emulex MT-02 SCSI/QIC-02 controller
        xxx-xxxx        Emulex MD21 SCSI-ESDI controller

NONE
        501-1075        3/50 motherboard w/o FPU
        501-1133        3/50 motherboard w/o FPU
        501-1162        3/50 motherboard w/o FPU
        501-1205        3/60 motherboard 4M with mono
        501-1207        3/50 motherboard with FPU
        501-1241        386i/150 motherboard
        501-1322        3/60 motherboard 4M w/o mono
        501-1324        386i/250 motherboard
        501-1334        3/60 motherboard 0M with mono
        501-1345        3/60 motherboard 0M w/o mono
        501-1378        3/60LE motherboard
        501-1382        4/60 (SPARCstation 1) motherboard
        501-1401        3/80 motherboard
        501-1413        386i/250 motherboard
        501-1414        386i/150 motherboard
        501-1627        4/20 (SPARCstation SLC) motherboard 8M
        501-1629        4/60 (SPARCstation 1) motherboard
        501-1632        4/65 (SPARCstation 1+) motherboard 8M w/FPU
        501-1638        4/75 (SPARCstation 2) motherboard 16M FCC-A
        501-1650        3/80 motherboard
        501-1680        4/20 (SPARCstation SLC) motherboard 0M
        501-1689        4/40 (SPARCstation IPC) motherboard 8M FCC-A
        501-1720        4/20 (SPARCstation SLC) motherboard 8M
        501-1733        SPARCstation 10 motherboard
        501-1744        4/75 (SPARCstation 2) motherboard 0M FCC-A
        501-1748        4/20 (SPARCstation SLC) motherboard 0M
        501-1780        4/50 (SPARCstation IPX) motherboard 16M
        501-1810        4/50 (SPARCstation IPX) motherboard 0M
        501-1835        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        501-1858        4/75 (SPARCstation 2) motherboard 16M FCC-B
        501-1859        4/75 (SPARCstation 2) motherboard 0M FCC-B
        501-1861        4/25 (SPARCstation ELC) motherboard 0M
        501-1870        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        501-1912        4/75 (SPARCstation 2) motherboard 32M FCC-B
        501-1926        4/75 (SPARCstation 2) motherboard 32M FCC-B
        501-1959        4/50 (SPARCstation IPX) motherboard 16M
        501-1974        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        501-1989        4/75 (SPARCstation 2) motherboard 16M FCC-B
        501-1995        4/75 (SPARCstation 2) motherboard 0M FCC-B
        501-2031        4/30 (SPARCstation LX/ZX) motherboard 32M
        501-2032        4/30 (SPARCstation LX/ZX) motherboard 16M
        501-2044        4/50 (SPARCstation IPX) motherboard 0M
        501-2079        4/10 (SPARCclassic X) motherboard 4M
        501-2200        4/15 (SPARCclassic) motherboard 16M
        501-2233        4/30 (SPARCstation LX/ZX) motherboard 0M
        501-2259        SPARCstation 10 motherboard
        501-2262        4/10/15 (SPARCclassic X/SPARCclassic) motherboard 0M
        501-2274        SPARCstation 10 motherboard (model 20 only)
        501-2313        4/10 (SPARCclassic X) motherboard 8M
        501-2326        4/15 (SPARCclassic) motherboard 32M
        501-2365        SPARCstation 10 motherboard
        501-2377        SPARCstation 10SX/BSX motherboard 0M
        501-2474        4/30 (SPARCstation LX/ZX) motherboard 0M
        501-2495        4/75 (SPARCstation 2) motherboard 0M (270-1926) w/SPARC POWER uP
        501-2496        4/50 (SPARCstation IPX) motherboard 0M (270-1780) w/SPARC POWER uP
        501-2505        4/75 (SPARCstation 2) motherboard 0M (270-1638) w/SPARC POWER uP
        501-2506        4/75 (SPARCstation 2) motherboard 0M (270-1858) w/SPARC POWER uP
        501-2507        4/50 (SPARCstation IPX) motherboard 0M (270-1959) w/SPARC POWER uP

UNKNOWN
        501-1671        SPARCcenter 2000 system control board
        501-1979        SPARCserver 1000 system control board
        501-2335        SPARCcenter 2000 system control board
        501-2406        SPARCcenter 2000 system control board unprogrammed
        501-2412        SPARCserver 1000 system control board unprogrammed


    CPU boards/motherboards
    -----------------------

501-1007(-04 to -08)    100U,2/120,2/170 CPU Multibus
        10MHz 68010, no floating point chip, MMU, no on-board memory.
        Multibus interface.

        The CPU board is entirely concealed within the chassis. On one
        long edge, it has Multibus card-edge connectors. On the other
        long edge, from top to bottom, it has: a header connector for the
        Sun-1 parallel keyboard and mouse, eight LEDs, and a 50-pin header
        connector (J1) for two serial ports.

        The LEDs display the usual sort of test cycling at power-up.
        Unlike later models, they do not simply blink or cylon while the
        OS is running; instead, they display all sorts of patterns,
        possibly in response to bus activity (?).

        Jumper information:

        J200    Crystal shunt                           JUMPED by default
                 Located by crystal at D1.
          Removed for A.T.E. testing, installed for normal operation.

        J400    EPROM select                            JUMPED by default
                 Located by EPROMs at D10.
          1-2   selects 27128 EPROMs (default)
          3-4   selects 27256 EPROMs

        J700    Bus priority on serial arbitration      UNJUMPED by default
                 Located by bus connectors.

        J701    Common bus request arbiter              UNJUMPED by default
                 Located by bus connectors.
          If the CPU board is used in conjunction with a Multibus DMA
          board (such as a disk or tape controller) that does NOT
          support the Common Bus Request (CBRQ), the CPU board must be
          configured such that it gives up the Multibus after every
          Multibus cycle, by jumping J701. This also causes three
          additional wait states for each Multibus access. When this
          jumper is unjumped, the CPU board retains bus mastership until
          a lower priority master requests it by asserting CBRQ.
          Following a CBRQ, the CPU board yields mastership for at least
          one cycle. Certain machine configurations (especially those
          with color) will be much slower if this jumper is jumped.

        J702    Enables the CCLK on P1  JUMPED by default
                 Located by bus connectors.

        J703    Enables the BCLK on P1  JUMPED by default
                 Located by bus connectors.

        J801    Selects +5V for the parallel mouse      UNJUMPED by default
                 Located by J2 header connector.
          Used only in 100U configurations (?).

        The two serial ports on J1 are usually labelled SIO-A and SIO-B
        on the back of the machine and appear as /dev/ttya and /dev/ttyb
        under SunOS. The documented maximum output speed is 19200 bps.
        All ports are wired DTE and are compatible with both RS-232C and
        RS-423, using Zilog Z8530A dual UART chips. The pinout of J1 is:

           3    TxD-A       14  DTR-A       33  DD-B
           4    DB-A        15  DCD-A       34  CTS-B
           5    RxD-A       22  DA-A        36  DSR-B
           7    RTS-A       24  BSY-A       38  GND-B
           8    DD-A        28  TxD-B       39  DTR-B
           9    CTS-A       29  DB-B        40  DCD-B
           11   DSR-A       30  RxD-B       47  DA-B
           13   GND-A       32  RTS-B       49  BSY-B

        Power requirements are +5V @ 6A.

501-1051        2/120,2/170 CPU Multibus
        10MHz 68010, no floating point chip, MMU, no on-board memory.
        Multibus interface.

        The CPU board is entirely concealed within the chassis. On one
        long edge, it has Multibus card-edge connectors. On the other
        long edge, from top to bottom, it has: a header connector for the
        Sun-1 parallel keyboard and mouse, eight LEDs, and a 50-pin header
        connector (J1) for two serial ports.

        Jumper information:

        J100
          Sixteen pins, hardwired. All unjumped by default.

        J102
          1-2   Connects -5V to P1 -5V (default)
          3-4   Connects -5V to regulator

        J200    Crystal shunt                           JUMPED by default
          Removed for A.T.E. testing, installed for normal operation.

        J400
          1-2   selects 27128 EPROMs (default)
          3-4   selects 27256 EPROMs

        J700
          1-2   CPU drives P1 reset                     (jumped by default)
          3-4   P1 INT drives CPU reset                 (unjumped by default)
          5-6   serial arbiter enable                   (unjumped by default)
          7-8   arbiter bus config select               (unjumped by default)
                  If the CPU board is used in conjunction with a
                  Multibus DMA board (such as a disk or tape controller)
                  that does NOT support the Common Bus Request (CBRQ),
                  the CPU board must be configured such that it gives up
                  the Multibus after every Multibus cycle, by jumping
                  this jumper. This also causes three additional wait
                  states for each Multibus access. When this jumper is
                  unjumped, the CPU board retains bus mastership until a
                  lower priority master requests it by asserting CBRQ.
                  Following a CBRQ, the CPU board yields mastership for
                  at least one cycle. Certain machine configurations
                  (especially those with color) will be much slower if
                  this jumper is jumped.

        J701
          1-2   CPU drives P1 BCLK                      (jumped by default)
          3-4   CPU drives P1 CCLK                      (jumped by default)

        J801
          Not used, unjumped by default.

        The two serial ports on J1 are usually labelled SIO-A and SIO-B
        on the back of the machine and appear as /dev/ttya and /dev/ttyb
        under SunOS. The documented maximum output speed is 19200 bps.
        All ports are wired DTE and are compatible with both RS-232C and
        RS-423, using Zilog Z8530A dual UART chips. The pinout of J1 is:

           3    TxD-A       14  DTR-A       33  DD-B
           4    DB-A        15  DCD-A       34  CTS-B
           5    RxD-A       22  DA-A        36  DSR-B
           7    RTS-A       24  BSY-A       38  GND-B
           8    DD-A        28  TxD-B       39  DTR-B
           9    CTS-A       29  DB-B        40  DCD-B
           11   DSR-A       30  RxD-B       47  DA-B
           13   GND-A       32  RTS-B       49  BSY-B

        Power requirements are +5V @ 6A, and -5V @ 0.1A or -12V @ 0.1A.
        The last two are mutually exclusive.

501-1074        3004 "Carrera" CPU VME 2M (3/75/140/150/160/180)
        16.67MHz 68020, 68881, Sun-3 MMU with eight hardware contexts, up
        to 4M of onboard memory (depending on model). VME bus interface.

        From left to right with component side up and connector edge
        toward you (normal top edge at left), the rear edge has: a
        female DB15 AUI Ethernet connector; eight LEDs (bit 0 to the
        top/left); a switch to toggle between Normal and Diagnostics
        modes; a reset switch; a female DB9 monochrome video connector;
        a female DB15 keyboard/mouse connector; and two female DB25
        serial port connectors (ports A and B from left to right
        (top/bottom)).

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        Jumpers J2501, J2503, and J2505 relate to Ethernet. The pinout
        of the AUI Ethernet connector is:

            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            5   E.RxD+              12  E.RxD-
            6   GND                 13  +12V
            7   VCC (see J2503)

        The eight LEDs are used for diagnostic purposes.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM" (labelled "BOOT" on some early versions). If
        you want extended diagnostics when you power up the system, set
        the switch to the "DIAG" position. If the switch is set to
        "DIAG", power-on self-test messages are sent to serial port A.

        The user reset button invokes a watchdog reset. The result
        depends on the value at address 0x17 of the EEPROM. (?)

        The monochrome video output levels are ECL/TTL, with a
        resolution of 1152 x 900 at 61.8KHz horizontal sync and 66Hz
        vertical sync. The pinout of the monochrome video connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
                                    9   GND

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The documented maximum speeds are 19200 bps for
        output and 9600 bps for input. The pinout of the serial ports
        is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        There are a variety of jumper blocks, many of which (oddly) have
        separate designations for each pair of pins. Locations below are
        given with component side up and connector edge toward you.

        J100 (pins 5-6 of a block on the left side, beyond the 68881)
          "Cache disable". Normally unjumped.

        J300 (block in far left corner, pin 1 nearest)
          1-2       unused
          3-4       VME interrupt level 1                       JUMPED
          5-6       VME interrupt level 2                       JUMPED
          7-8       VME interrupt level 3                       JUMPED
          9-10      VME interrupt level 4                       JUMPED
          11-12     VME interrupt level 5                       JUMPED
          13-14     VME interrupt level 6                       JUMPED
          15-16     VME interrupt level 7                       JUMPED

        J400 (block toward far left corner, pin 1 nearest)
          1-2       16.67MHz CPU clock                          JUMPED
          3-4       12.5MHz CPU clock                           UNJUMPED
          5-6       12.5MHz FPU clock                           UNJUMPED
          7-8       16.67MHz FPU clock                          JUMPED

        J1001 (single jumper in middle right)
          Jump to enable SCC clock.                             JUMPED

        J1200 (pins 4-5 of block in near left corner)
          Jump for 27256 boot PROMs.                            UNJUMPED

        J1201 (pins 5-6 of block in near left corner)
          Jump for 27512 boot PROMs.                            JUMPED

        J2301 (single jumper in near middle, to right of divider)
          Jump to enable video clock.                           JUMPED

        J2501 (pins 1-2 of block in near left)
          Jump to enable Ethernet clock.                        JUMPED

        J2502 (pins 1-2 of block in near left corner)
          Jump to enable VME clock.                             JUMPED

        J2503 (pins 3-4 of block in near left)
          Jump to put VCC on pin 7 of AUI Ethernet.             UNJUMPED

        J2505 (pins 7-8 of a block on the left side, beyond the 68881)
          Jump for a type-1 Ethernet transceiver, unjump for a type-2.

        J2700-J2703 (block in far left, pin 1 nearest)
          1-2       J2703, jump to enable VME reset master      JUMPED
          3-4       J2702, jump to enable VME reset slave       UNJUMPED
          5-6       J2701, jump to enable VME request/arbiter   JUMPED
          7-8       J2700, jump to enable VME request only      UNJUMPED

        J3101 (pins 1-2 of block on the left side, beyond the 68881)
          Jump for 2M CPU.

        J3102 (pins 3-4 of block on the left side, beyond the 68881)
          Jump for 4M CPU.

        Additional features of interest: the boot PROM is on the near
        left side at location U1200 (grid C5). The IDPROM is
        catty-corner from the boot PROM at location U1409 (grid B10).
        The keyboard fuse is by the reset switch at grid A10. The
        Ethernet fuse is in the middle of the right edge, near J1001, at
        grid E34.

        Note that boot PROM version 1.8 is required to boot from a
        QIC-24 tape. Boot PROM version 2.6 is required to boot from a
        QIC-24 tape in a Sun-2 shoebox. Boot PROM version 2.6 is also
        required to boot from an SMD disk attached to a Xylogics 7053
        SMD controller.

        Note that in order to use a VME 32-bit data device (e.g. MCP,
        HSI, ALM-2, SCA, or "Sun-3" SCSI (?)), the CPU revision must be
        501-1074-22, 501-1094-22, 501-1163-09, 501-1164-09, or later.

        Power requirements are +5V @ 14/14.6A (2M/4M), -5V @ 0.8A.

501-1075        3/50 motherboard w/o FPU 15.7MHz 68020, a socket for a
        68881 floating point chip (at 15.7MHz), Sun-3 MMU with eight
        hardware contexts, 4M of onboard memory. No bus interfaces.

        From left to right, the back edge of the board has: a female
        DB15 keyboard/mouse connector; eight LEDs (bit 0 to the left); a
        switch to toggle between Normal and Diagnostics modes; a BNC
        thin Ethernet connector; a female DB15 AUI Ethernet connector;
        two female DB25 serial port connectors (ports A and B from left
        to right); a female D50 SCSI port connector; and a female DB9
        monochrome video connector.

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The eight LEDs are used for diagnostic purposes. In the chart
        below, a "1" indicates a lit LED, and a "0" indicates an unlit
        LED. The pattern is shown left to right, as it appears on the
        LEDs.

            Pattern     Status                          Error
            --------    ------                          -----
            11111111    Resetting                       CPU or PROMs bad
            00000000    Test 0: CPU to SCC path         CPU board (SCC) bad
            10000000    Test 1: boot PROM               Boot PROM bad
            11000000    Test 3: context register        CPU board (MMU) bad
            00100000    Test 4: segment map RAM rd/wr   CPU board (MMU) bad
            10100000    Test 5: segment map RAM         CPU board (MMU) bad
            01100000    Test 6: page map RAM            CPU board (MMU) bad
            11100000    Test 7: memory data path        CPU board bad
            00010000    Test 8: bus error detection     CPU board bad
            10010000    Test 9: interrupt capability    CPU board bad
            01010000    Test 10: MMU read access        CPU board bad
            11010000    Test 11: MMU write access       CPU board bad
            00110000    Test 12: write to invalid page  CPU board bad
            10110000    Test 13: write to protected pg  CPU board bad
            01110000    Test 14: parity error check     CPU board bad
            11110000    Test 15: parity error check     CPU board bad
            00001000    Test 16: memory tests           CPU board bad
            00000001    Self-tests have found an error  See below
            00000010    An exception class error found  See below

        "Marching ones" (cycling through 10000000, 01000000, 00100000,
        etc.) indicates that Unix is running OK. On power up, it cycles
        through the tests in the chart above, then boots Unix. Pattern
        11111111 may also mean that a SCSI device was powered up prior
        to the CPU being powered up. If LED 7 (00000001) lights up while
        the tests are being performed, it indicates that the test
        failed. If LED 6 (00000010) lights up while the tests are being
        performed, it indicates that an unexpected error (bus error,
        address error, unexpected interrupt, etc.) occurred during the
        test. When all tests are finished, LED 5 (00000100) starts
        blinking to indicate that the ROM monitor is running and/or Unix
        is booting.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM" (labelled "BOOT" on some early versions). If
        you want extended diagnostics when you power up the system, set
        the switch to the "DIAG" position. If the switch is set to
        "DIAG", power-on self-test messages are sent to serial port A.

        Jumper J0642 and switch S0618 relate to Ethernet. The pinout of
        the AUI Ethernet connector is:

            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            5   E.RxD+              12  E.RxD-
            6   GND                 13  +12V

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The documented maximum speeds are 19200 bps for
        output and 9600 bps for input. The pinout of the serial ports
        is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        The pinout of the SCSI connector is:

            1   GND         17  GND         34  GND
            2   data bus 0  18  data parity 35  GND
            3   GND         19  GND         36  busy
            4   data bus 1  20  GND         37  GND
            5   GND         21  GND         38  acknowledge
            6   data bus 2  22  GND         39  GND
            7   GND         23  GND         40  reset
            8   data bus 3  24  GND         41  GND
            9   GND         25  GND???      42  message
            10  data bus 4  26  ???         43  GND
            11  GND         27  GND         44  select
            12  data bus 5  28  GND         45  GND
            13  GND         29  GND         46  command/data
            14  data bus 6  30  GND         47  GND
            15  GND         31  GND         48  request
            16  data bus 7  32  attention   49  GND
                            33  GND         50  input/output

        and the pattern of the pins is:

            49    46    43  ....  19    16    13    10    7    4    1
               48    45    42  ....  18    15    12    9    6    3
            50    47    44    41  ....  17    14    11    8    5    2

        The monochrome video output levels are ECL/TTL, with a
        resolution of 1152 x 900 at 62KHz horizontal sync and 66Hz
        vertical sync. The pinout of the monochrome video connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
                                    9   GND

        There are five jumpers/jumper blocks and one DIP switch block.
        All locations are given with component side up and connector
        side toward you.

        J0108 (forward far left corner, pin 1 at right)
         1-2    jump to test the onboard 4M RAM                 JUMPED
         3-4    jump to run "ETH SIA CAL." test                 UNJUMPED
         5-6    jump to "SCSI on (on is active high)"           UNJUMPED
         7-8    jump to "DCP on (on is active high)"            JUMPED

        J0123 (forward far left corner, pin 1 at right)
         1-2    15.7MHz clock for 68020                         JUMPED
         3-4    12.5MHz clock for 68020                         UNJUMPED
         5-6    12.5MHz clock for 68881                         UNJUMPED
         7-8    15.7MHz clock for 68881                         JUMPED

        J0642 (K4, by S0618, near AUI Ethernet connector)
         1-2    jump for type-1 Ethernet transceiver, unjump for type-2

        J0702 (leftish middlish, by 68881 socket and boot PROMs, pin 1
               at right)
         1-2    jump for 27256 PROMs                            UNJUMPED
         3-4    jump for 26512 PROMs                            JUMPED

        J1500 (right middlish)
         1-2    jump for 100MHz video clock                     JUMPED

        S0618 (by AUI Ethernet connector, switch 1 toward rear)
         1-8    ON for thin Ethernet (BNC connector), OFF for AUI

        Additional features of interest: the IDPROM is at location U0204
        (grid N21), on the left side toward the far end, by the battery.
        The boot PROM is at location U0701 (grid N9), on the left side
        toward the near end. The keyboard fuse F1 is near serial port B
        at grid F4 and the Ethernet fuse F2 is near the SCSI port at
        grid E4.

        Note that boot PROM version 1.8 is required to boot from a
        QIC-24 tape. Boot PROM version 2.5 is required to boot from a
        QIC-24 tape in a Sun-2 shoebox.

        Note that CPU revisions lower than 501-1075-10, 501-1162-08, and
        501-1133-10 may fail under SunOS 3.3. Additionally, the 370-1011
        Sysgen SC4000 SCSI/QIC-11 tape controller does not work with the
        3/50 under SunOS 3.3.

        Note that a bus error may occur when large executables are run
        during a prefetch across a page boundary with CPU revisions
        lower than 501-1162-11 and 501-1207-04.

        Power requirements are +5V @ 13.5A max, -5V (-5.2V?) @ 0.8A max,
        and +12V @ 0.5A max.

501-1094        3004 "Carrera" CPU VME 4M (3/75/140/150/160/180)
        See 501-1074.

501-1100        3/2xx CPU VME
        25MHz 68020, 20MHz 68881 floating point chip, Sun-3 MMU with
        eight hardware contexts, no on-board memory but 64K write-back
        cache, direct-mapped, virtually-indexed and virtually-tagged,
        with 16-byte lines. VME bus interface. 256K of dual-ported video
        RAM for the onboard high-resolution monochrome framebuffer.

        From left to right, with component side up and connector edge
        toward you (normal top at left), the rear edge of the board has:
        two female DB25 serial ports (A and B from left to right
        (top/bottom)); a female DB15 AUI Ethernet connector; a reset
        button; a switch to toggle between Normal and Diagnostics modes;
        a female DB15 keyboard/mouse connector; eight LEDs (bit 0 at the
        top/left); and at the bottom, a female DB9 high-res monochrome
        video connector.

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The pinout of the serial ports is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  -5V

        The pinout of the AUI Ethernet connector is:

            1   chassis ground      7   VCC (see J2401)
            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            4   chassis ground      12  E.RxD-
            5   E.RxD+              13  +12V
            6   GND

        The user reset button invokes a watchdog reset. The result
        depends on the value at address 0x17 of the EEPROM.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM". If you want extended diagnostics when you
        power up the system, set the switch to the "DIAG" position. If
        the switch is set to "DIAG", power-on self-test messages are
        sent to serial port A at 9600 bps or serial port B at 1200 bps.

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The eight LEDs are used for diagnostic purposes. In the chart
        below, a "1" indicates a lit LED, and a "0" indicates an unlit
        LED. Bit 0 is at the top and bit 7 is at the bottom; the
        patterns below are shown with bit 0 on the left.

            Pattern     Status
            --------    ------
            11111111    Resetting
            10000000    PROM checksum test
            01000000    DVMA register test
            11000000    Context register test
            00100000    Segment map read/write test
            10100000    Segment map address test
            01100000    Page map test
            11100000    Memory path data test
            00010000    Nonexistent memory bus error test
            10010000    Interrupt test
            01010000    Time-Of-Day clock interrupt test
            11010000    MMU protection/status tests
            00110000    ECC error test
            10110000    Cache data 3-pattern test
            01110000    Cache tag 3-pattern test
            11110000    Memory tests
            01001111    Initializing MMU
            00000001    Self-tests have found an error
            00000010    An exception class error occurred

        "Marching ones" (cycling through 10000000, 01000000, 00100000,
        etc.) indicates that Unix is running OK. On power up, it cycles
        through the tests in the chart above, then boots Unix. If LED 7
        (00000001) lights up while the tests are being performed, it
        indicates that the test failed. If LED 6 (00000010) lights up
        while the tests are being performed, it indicates that an
        unexpected error (bus error, address error, unexpected
        interrupt, etc.) occurred during the test. When all tests are
        finished, LED 5 (00000100) starts blinking to indicate that the
        ROM monitor is running and/or Unix is booting.

        The monochrome video output levels are ECL/TTL. The output is
        high resolution (1600 x 1280, 89KHz horizontal sync, 66Hz
        vertical sync) only and a high-resolution monochrome monitor
        must be used. The pinout of the monochrome video connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
                                    9   GND

        There are a variety of jumper blocks. All locations are given
        with component side up and connector side toward you.

        J100 (single jumper at H-5, in middle left)
          Jump to disable 68020 cache.                          UNJUMPED

        J200 (block at J-6, in middle left, pin 1 to right)
          1-2   unused
          3-4   25MHz CPU clock                                 JUMPED
          5-6   25MHz FPU clock                                 UNJUMPED
          7-8   20MHz FPU clock                                 JUMPED

        J300 (single jumper at H-2, in middle left edge, only on 501-1100)
          Jump to enable P2 bus.                                JUMPED

        J500 (block at H-3/H-4, in middle left, pin 1 to right)
          1-2   VME interrupt level 1                           JUMPED
          3-4   VME interrupt level 2                           JUMPED
          5-6   VME interrupt level 3                           JUMPED
          7-8   VME interrupt level 4                           JUMPED
          9-10  VME interrupt level 5                           JUMPED
          11-12 VME interrupt level 6                           JUMPED
          13-14 VME interrupt level 7                           JUMPED
          15-16 unused                                          UNJUMPED

        J2000 (block at H-1, in middle left, pin 1 to right)
          1-2   Select 27512 boot PROM                          JUMPED
          3-4   Select 27256 boot PROM                          UNJUMPED

        J2401 (block at A-16, in near middle, pin 1 nearest)
          1-2   Enable Ethernet clock                           JUMPED
          3-4   +5V to Ethernet tap                             UNJUMPED
          5-6   jump for type-1 transceiver (capacitive), unjump for
                 type-2 (xformer)
          7-8   SCC clock enable (501-1206 only)                JUMPED

        J2500 (block at L-11, in far left, pin 1 to right)
          1-2   CPU is VME arbiter & requester                  JUMPED
          3-4   CPU is VME requester only                       UNJUMPED
          5-6   CPU is VME reset slave                          UNJUMPED
          7-8   CPU is VME reset master                         JUMPED

        J2600 (single jumper at L-9, in far left)
          Jump to enable 16MHz VME clock.                       JUMPED

        Additional features of interest: the boot PROM is in the near
        left at location U2008 (grid C1). The IDPROM is in the middle
        left at location U1907 (grid E3 (E4?)). The Ethernet fuse is by
        the Ethernet connector at grid A12 and the keyboard fuse by the
        reset switch at grid A17. The lithium battery (BBCV2) in the far
        middle is Matsushita Electric/Panasonic part number BR2325. It
        is documented as not being a customer-replacable part.

        Note that boot PROM version 2.6 is required to boot from an SMD
        disk connected to a Xylogics 7053 SMD controller.

        Note that when "CPU EPROM 2.1" (probably boot PROM version 2.1)
        is installed, two control-G's cause the keyboard bell to remain
        on until the system is reset.

        Note that the minimum CPU revision required for use with the IPC
        is 501-1100-06 or 501-1206-06.

        Power requirements are +5V @ 22.5A and -5V @ 0.6A.

501-1133        3/50 motherboard w/o FPU
        See 501-1075.

501-1134        3/110 CPU VME
        68020, 68881, Sun-3 MMU with eight hardware contexts, 4M onboard
        RAM. VME bus interface. Onboard cgfour color framebuffer.

        From left to right with component side up and connector edge
        toward you (normal top edge at left), the rear edge has: a
        female DB15 AUI Ethernet connector; a switch to toggle between
        Normal and Diagnostics modes; eight LEDs (bit 0 to the
        left/top); a female DB15 keyboard/mouse connector; two female
        DB25 serial port connectors (ports A and B from left to right
        (top/bottom)); four BNC color video connectors; and a reset
        switch.

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        Jumpers J2500, J2501, and J2503 relate to Ethernet. The pinout of
        the AUI Ethernet connector is:

            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            5   E.RxD+              12  E.RxD-
            6   GND                 13  +12V
            7   VCC (see J2503)

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM" (labelled "BOOT" on some early versions). If
        you want extended diagnostics when you power up the system, set
        the switch to the "DIAG" position. If the switch is set to
        "DIAG", power-on self-test messages are sent to serial port A.

        The eight LEDs are used for diagnostic purposes.

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The documented maximum speeds are 19200 bps for
        output and 9600 bps for input. The pinout of the serial ports
        is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        The four video connectors are Blue, Green, Red, and Sync from
        left to right (top/bottom). The resolution is 1152 x 900 with a
        61.8KHz horizontal sync and 66Hz vertical sync.

        The user reset button invokes a watchdog reset. The result
        depends on the value at address 0x17 of the EEPROM. (?)

        There are a variety of jumper blocks, many of which (oddly) have
        separate designations for each pair of pins. Locations below are
        given with component side up and connector edge toward you.

        J100 (in a jumper block in far left)
          "Cache disable."                                      UNJUMPED

        J300 (block in far left corner, pin 1 nearest)
          1-2   unused
          3-4   P1 (VME) interrupt request 1                    JUMPED
          5-6   P1 (VME) interrupt request 2                    JUMPED
          7-8   P1 (VME) interrupt request 3                    JUMPED
          9-10  P1 (VME) interrupt request 4                    JUMPED
          11-12 P1 (VME) interrupt request 5                    JUMPED
          13-14 P1 (VME) interrupt request 6                    JUMPED
          15-16 P1 (VME) interrupt request 7                    JUMPED

        J400 (in a jumper block in far left)
          Jump to enable main clock.                            JUMPED

        J1001 (single jumper in middle, to right of 68881)
          Jump to enable SCC clock.                             JUMPED

        J1200 (pins 1-2 of jumper block along left edge)
          Jump to select 256K boot PROM.                        UNJUMPED

        J1201 (pins 3-4 of jumper block along left edge)
          Jump to select 512K boot PROM.                        JUMPED

        J1700 (single jumper in near right corner)
          Jump to enable 92.94MHz video clock.                  JUMPED

        J2500 (single jumper along left edge)
          Jump for type-1 Ethernet transceiver, unjump for type-2.

        J2501 (pins 3-4 of jumper block in near right corner)
          Jump to enable Ethernet clock.                        JUMPED

        J2502 (single jumper in far left corner, beyond J300)
          Jump to enable P1 system block (VME bus clock).       JUMPED

        J2503 (pins 1-2 of jumper block in near right corner)
          Jump to put +5V on pin 7 of Ethernet connector. May not
          have any pins?

        J2700 (in a jumper block in far left)
          VME BG3 in.                                           UNJUMPED

        J2701 (in a jumper block in far left)
          Bus arbiter/requester.                                JUMPED

        J2702 (in a jumper block in far left)
          VME control buffer reset in.                          UNJUMPED

        J2703 (in a jumper block in far left)
          System reset.                                         JUMPED

        J3100 (3101?) (single jumper in middle right)
          Disable onboard memory.                               UNJUMPED

        Note that J400, J100, J2703, J2701, J2702, and J2700 are all in
        the same block in the far left area, apparently in that order
        from nearest to farthest. On the diagram in the FE manual, there
        are eight jumper pairs, and it is not clear exactly what is
        where.

        Additional features of interest: the boot PROM is in the near
        left, at location U1200. The IDPROM is in the near middle at
        location U1409. The 8530 UARTs are in the middle, nearer than
        the 68881. The Ethernet fuse is by the diag/norm switch at grid
        A6 and the keyboard fuse is by the keyboard connector at grid
        A12.

        Note that when this board is used with a 32-bit data device such
        as an MCP, HSI, ALM-2, SCA, or "Sun-3" SCSI controller, use
        501-1134-06 or later.

        Note that CPU revisions lower than 501-1134-07 Rev 50 may fail
        vid3.diag or video3.exec.

        The power requirements are +5V @ 14.7A, -5V @ 4.1A, and +12V @
        0.15A.

501-1141        2050 CPU VME 1M (2/50)
501-1142        2050 CPU VME 2M (2/50)
501-1143        2050 CPU VME 4M (2/50)
501-1144        2050 CPU VME 1M (2/130/160)
501-1145        2050 CPU VME 2M (2/130/160)
501-1146        2050 CPU VME 4M (2/130/160)
        These boards are apparently all sufficiently identical
        (variations on the 2050 CPU) to be treated as one.

        10MHz 68010, up to 4M on-board DIP memory with 256Kx1 chips.
        VME bus interface.

        From left to right, the back edge of the board has: eight LEDs;
        a female DB15 keyboard/mouse connector; two female DB25 serial
        port connectors (ports A and B from left to right); a female
        DB15 AUI Ethernet connector; and a female DB9 monochrome video
        connector.

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        The eight LEDs are used for diagnostic purposes. In the chart
        below, a "1" indicates a lit LED, and a "0" indicates an unlit
        LED. Orientation of the LEDs on the board is unknown.

            Pattern     Status                             Problem
            --------    ------                             -------
            00000000    After complete power-up sequence   System running OK
            00000001    Finished self-test, setting up to  Check CPU first,
                         boot                               then expansion brd
            00000010    Entering user watchdog routine     Software bug
            00000011    After local memory verified        CPU
            00000111    After diags, while setting up      CPU
            00001000    Blinks off and on while NMI OK     System running OK
            00010001    Testing context registers          CPU
            00100001    Testing constant data in seg map   CPU
            00100010    Testing addr dependency in seg map CPU
            00100011    Testing data lines in seg map      CPU
            00110001    Testing constant data in page map  CPU
            00110011    Testing data lines in page map     CPU
            00110010    Testing addr dep in page map       CPU
            01000000    Testing PROM contents              CPU or PROMs bad
            01010000    Testing SCC chip(s)                CPU
            01110000    Sizing memory before constant test CPU, then expansion
            01110001    Testing constant data in memory    CPU, then expansion
            01110010    Testing addr dependency in memory  CPU, then expansion
            01111111    Testing parity circuitry           CPU, then expansion
            10000001    Testing timer chip                 CPU
            11110001    Setting up memory after diags      CPU, then expansion
            11110010    Setting up maps after diagnostics  CPU
            11110011    Setting up frame buffer and video  CPU -- check video
                         clock jumper                       jumpers
            11110100    Setting up NMI or keyboard         CPU
            11111111    A reset sets LEDs to this state    CPU or PROMs bad, or
                                                            "bad device"

        The pinout of the keyboard/mouse connector is probably the same
        as for any Sun-3 with a DB15 connector.

        The serial ports appear to conform to both RS-232 and RS-423 and
        are wired DTE. The pinout of the serial ports is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        Jumpers J200 11-12, J702, and J704 relate to Ethernet. The
        pinout of the AUI Ethernet connector is:

            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            5   E.RxD+              12  E.RxD-
            6   GND                 13  +12V
            7   VCC

        The monochrome video output levels are ECL/TTL. Jumpers J1600
        1-8 and J1801 relate to video. The pinout of the monochrome
        video connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
            5   VCC                 9   GND

        There are nine jumper blocks on the board. Coordinates are
        printed at the edges of the board; pin 1 orientations are given
        assuming the connectors nearest you and the component side up.

        J200 at F-9, pin 1 at left end
          1-2   UART clock                                      JUMPED
          3-4   10/12MHz CPU operation                          JUMPED
          5-6   12/10MHz CPU operation                          UNJUMPED
          7-8   reserved                                        UNJUMPED
          9-10  reserved                                        JUMPED
          11-12 Ethernet clock                                  JUMPED
          13-14 memory refresh                                  JUMPED
          15-16 time outs

        J500 at A-16/17, pin 1 toward VME connectors
          1-2   27128 PROMs
          3-4   27256 or 27512 PROMs
          5-6   27128 or 27256 PROMs
          7-8   27512 PROMs

          27128 PROMs: 1-2, 5-6 jumped (for older PROMs)
          27256 PROMs: 3-4, 5-6 jumped
          27512 PROMs: 3-4, 7-8 jumped (for version 1.1.2 PROMs)

        J702 at I/J-4
          Jump to put -5VDC on pin 7 of Ethernet

        J704 at I/J-4
          Jump for type-1 (capacitative coupled) Ethernet transceiver,
          umjump for type-2 (transformer coupled).

        J800 at D-37, pin 1 at left end
          1-2   VME interrupt level 1 (normally jumpered, may be    JUMPED
                  unjumpered on some boards)
          3-4   VME interrupt level 2                           JUMPED
          5-6   VME interrupt level 3                           ?
          7-8   VME interrupt level 4                           ?
          9-10  VME interrupt level 5                           ?
          11-12 VME interrupt level 6                           JUMPED
          13-14 VME interrupt level 7                           JUMPED
          15-16 unused
            Jumpers marked "?" are listed as jumped by default in some
            sources and unjumped by default in others.

        J900 at C-37, pin 1 at left end
          1-2   DVMA addr comparator A20=0/*1                   JUMPED
          3-4   DVMA addr comparator A21=0/*1                   JUMPED
          5-6   DVMA addr comparator A22=0/*1                   JUMPED
          7-8   DVMA addr comparator A23=0/*1                   JUMPED
          9-10  VME arbiter                                     JUMPED
          11-12 VME reset master                                JUMPED
          13-14 VME reset slave                                 UNJUMPED
          15-16 VME system clock                                JUMPED

        J1201 at D-29, pin 1 at left end        Memory type/size
                    1M              2M             3M,4M
                   ----            ----           -------
          1-2       UN              JU              JU
          3-4       UN              UN              JU
          5-6       JU              UN              UN
          7-8       UN              JU              JU
          9-10      JU              UN              UN
          11-12     UN              JU              JU
          13-14     JU              UN              UN
          15-16     UN              JU              JU
            The 1M configuration uses 64Kx1 DIPs occupying positions
            40-57 of rows N-U (note that the coordinate system changes
            in the memory area, in the right corner of the board nearest
            the VME connectors). All other configurations use 256Kx1
            DIPs. The 2M configuration occupies only rows N-Q, the 3M
            configuration presumably occupies rows N-S, and the 4M
            configuration populates all rows. All configurations have
            one bit of parity per byte.

        J1600 at E-17, pin 1 at left end
          1-2   video register sense bit 0, unjumped if display    JUMPED
                 size is 1024 x 1024
          3-4   video register sense bit 1, umjumped if a color    JUMPED
                 display board is installed (2/130, 2/160 only)
          5-6   video register sense bit 2                      JUMPED
          7-8   video register sense bit 3                      JUMPED
          9-10  reserved
          11-12 reserved
          13-14 10/12MHz CPU operation                          JUMPED
          15-16 12/10MHz CPU operation                          UNJUMPED

        J1801 at L/M-6
          Jump by default to enable 100MHz video clock, unjump
          to disable.

        The ID PROM is at location A19. The missing (?) chips at A/B3-7
        (9518) and E6 (P16R4) were for hardware-assisted DES encryption.

        Power requirements are +5V @ 12A, +12V @ 1A, and -12V @ 0.5A.

501-1162        3/50 motherboard w/o FPU
        See 501-1075.

501-1163        3004 "Carrera" CPU VME 2M (3/75/140/150/160/180)
        See 501-1074.

501-1164        3004 "Carrera" CPU VME 4M (3/75/140/150/160/180)
        See 501-1074.

501-1199        4/1xx CPU VME 8M w/o FPU
        14.28MHz MB86900, Weitek 1164/1165 (if installed), Sun-4 MMU
        with 16 hardware contexts. VME bus interface (although busmaster
        cards are not supported). P4 connector for framebuffer.

        From left to right, with the component side up and the connector
        side toward you (normal top edge at the left), the rear edge of
        the board has: a keyboard connector; eight LEDs (bit 0 to the
        right/bottom); a switch to toggle between Normal and Diagnostic
        modes; an Ethernet connector; two serial ports (B and A from
        left to right (top/bottom)); a SCSI connector; and a reset (?)
        button.

        Memory consists of four banks of eight static-column 120ns
        SIMMs, either 256K (501-1314) or 1M (501-1466). Valid memory
        combinations are 8M (all banks 256K), 16M (two banks of 1M), 20M
        (two banks of 1M and two banks of 1M), or 32M (all banks 1M).

            Nearest VME connectors
             _______     _______
            |       |   |       |
            |   3   |   |   4   |             Banks have eight SIMM slots
            | U1516 |   | U1616 |             each.
            |_______|   |_______|   J400

             _______     _______              Note: when using mixed SIMMs
            |       |   |       | J1400       to get 20M, the 1M SIMMs must
            |   1   |   |   2   |             go in banks 2 and 4 or the
            | U1500 |   | U1600 | J1300       machine won't boot.
            |_______|   |_______|

             J101 1-2 (not revelant to memory)
             J100 1-2
                  3-4

        Total memory:           8M      16M     20M     32M
        SIMM size:              256K    1M      256K/1M 1M

        J100    Cache line
          1-2                   JU      UN      JU      UN
          3-4                   UN      JU      UN      JU

        J400    Memory strobe configuration (pin 1 farthest)
          1-2                   UN      JU      UN      JU
          3-4                   JU      UN      UN      JU
          5-6                   JU      JU      JU      UN

        J1300   SIMM addressing mode (pin 1 farthest)
          1-2   same            JU      UN      UN      JU
          3-4   different       UN      JU      JU      UN
          5-6   256K            JU      UN      JU      UN
          7-8   1M              UN      JU      UN      JU
          9-10  2M              UN      UN      UN      UN
          11-12 <32M            JU      JU      JU      UN
          13-14 32M             UN      UN      UN      JU
          15-16 unused          UN      UN      UN      UN

        J1400   SIMM addressing mode (pin 1 farthest)
          1-2   same            JU      UN      UN      JU
          3-4   different       UN      JU      JU      UN
          5-6   256K            JU      UN      UN      UN
          7-8   1M              UN      JU      JU      JU
          9-10  2M              UN      UN      UN      UN
          11-12 <32M            JU      JU      JU      UN
          13-14 32M             UN      UN      UN      JU
          15-16 unused          UN      UN      UN      UN

        There are a variety of other jumper blocks. Locations below are
        given with component side up and connector edge toward you.

        J101 (single jumper, see diagram)
          Jump to enable 57.1MHz clock                          JUMPED

        J600 (block toward far right, pin 1 farthest)
          1-2   27512 boot PROMs                                JUMPED
          3-4   27256 boot PROMs                                UNJUMPED

        J700 (block in center, pin 1 at left)
          1-2   VME interrupt level 1                           JUMPED
          3-4   VME interrupt level 2                           JUMPED
          5-6   VME interrupt level 3                           JUMPED
          7-8   VME interrupt level 4                           JUMPED
          9-10  VME interrupt level 5                           JUMPED
          11-12 VME interrupt level 6                           JUMPED
          13-14 VME interrupt level 7                           JUMPED
          15-16 unused

        J800 (single jumper in near middle)
          Force reset.

        J900 (single jumper toward far right, by battery)
          Short 3V battery. (Erase EEPROM?)                     UNJUMPED

        J1000 (single jumper in middle right)
          Enable UART clock.                                    JUMPED

        J1700 (single jumper toward near right)
          Enable Ethernet clock.                                JUMPED

        J1701 (single jumper in near middle)
          Jump for type-1 Ethernet transceiver, unjump for type-2.

        J1800 (single jumper in near middle)
          Jump for AUI Ethernet, unjump for thin Ethernet/autosense.
          (? -- no BNC connector shown on diagram!)

        J1900 (block in center, pin 1 at left)
          1-2   CPU is VME requester only                       UNJUMPED
          3-4   CPU is VME requester                            JUMPED

        J1901 (block in center, pin 1 at left)
          1-2   CPU is VME reset slave                          UNJUMPED
          3-4   CPU is VME reset master                         JUMPED

        P2101 (single jumper toward far right)
          Jump to enable VME system clock.                      JUMPED

        VJMP2-VJMP9
          Unknown.

        Additional features of interest: the boot PROMs are in the far
        right corner at locations U601-U604 (1651-1654 respectively).
        Nearby, along the right edge, is a 3V battery. The P4 connector
        is in the middle right, by the divider. The IDPROM is nearer, at
        location U805. The keyboard fuse F1000 is near the keyboard
        connector at grid C2 and the Ethernet fuse F1800 is near the
        Ethernet connector at grid F2.

        Note that 501-1199 boards must be 501-1199-11 or later, and
        501-1237 boards 501-1237-11 or later to use a type-4 keyboard.

        Note that the 501-1384 FPU2 is supported only on 501-1512/1513/
        1514/1515/1516/1517.

        Note that for the Ethernet autosense to operate, more than 30mA
        must be present on the +12V return.

        Power requirements (with FPU) are +5V @ 13.8A and -5V @ 0.1A.

501-1205        3/60 motherboard 4M with mono
        20MHz 68020, 20MHz 68881 floating point chip, Sun-3 MMU with
        eight hardware contexts, up to 24M on-board SIMM memory. No bus
        interface, but a P4 connector for a color video board or other
        option -- not the same as the P4 in the 3/80 or any SPARC model.

        From left to right, the back edge of the board has: a female
        DB15 keyboard/mouse connector; eight LEDs (bit 0 to the right);
        a switch to toggle between Normal and Diagnostics modes; a BNC
        thin Ethernet connector; a female DB15 AUI Ethernet connector;
        two female DB25 serial port connectors (ports B and A from left
        to right); a female D50 SCSI port connector; and a female DB9
        monochrome video connector (for those models with a monochrome
        framebuffer). Above these are an upper row of cutouts or
        connectors for color video and other options.

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The eight LEDs are used for diagnostic purposes. In the chart
        below, a "1" indicates a lit LED, and a "0" indicates an unlit
        LED. The pattern is shown right to left, as it appears on the
        LEDs.

            Pattern     Status
            --------    ------
            11111111    Resetting
            00000001    PROM checksum test
            00000011    Context register test
            00000100    Segment map read/write test
            00000101    Segment map address test
            00000110    Page map test
            00000111    Memory path data test
            00001000    Nonexistent memory bus error test
            00001001    Interrupt test
            00001010    Time-Of-Day clock interrupt test
            00001011    MMU protection/status tests
            00001110    Parity error test #1
            00001111    Parity error test #2
            00010000    Memory test
            10000000    Self-tests have found an error
            01000000    An exception class error occurred

        "Marching ones" (cycling through 10000000, 01000000, 00100000,
        etc.) indicates that Unix is running OK. On power up, it cycles
        through the tests in the chart above, then boots Unix. If LED 7
        (10000000) lights up while the tests are being performed, it
        indicates that the test failed. If LED 6 (01000000) lights up
        with the tests are being performed, it indicates that an
        unexpected error (bus error, address error, unexpected
        interrupt, etc.) occurred during the test. When all tests are
        finished, LED 5 (00100000) starts blinking to indicate that the
        ROM monitor is running and/or Unix is booting.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM". If you want extended diagnostics when you
        power up the system, set the switch to the "DIAG" position. If
        the switch is set to "DIAG", power-on self-test messages are
        sent to serial port A at 9600 bps, 8 data bits, one stop bit, no
        parity, and XON/XOFF flow control.

        Whether the BNC or AUI Ethernet connector is use is controller
        by part of J800. The pinout of the AUI Ethernet connector is:

            1   chassis ground      7   VCC
            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            4   chassis ground      12  E.RxD-
            5   E.RxD+              13  +12V
            6   GND

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The pinout of the serial ports is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        The pinout of the SCSI connector is:

            1   GND         17  GND         34  GND
            2   data bus 0  18  data parity 35  GND
            3   GND         19  GND         36  busy
            4   data bus 1  20  GND         37  GND
            5   GND         21  GND         38  acknowledge
            6   data bus 2  22  GND         39  GND
            7   GND         23  GND         40  reset
            8   data bus 3  24  GND         41  GND
            9   GND         25  GND???      42  message
            10  data bus 4  26  TERMPWR     43  GND
            11  GND         27  GND         44  select
            12  data bus 5  28  GND         45  GND
            13  GND         29  GND         46  command/data
            14  data bus 6  30  GND         47  GND
            15  GND         31  GND         48  request
            16  data bus 7  32  attention   49  GND
                            33  GND         50  input/output

        and the pattern of the pins is:

            49    46    43  ....  19    16    13    10    7    4    1
               48    45    42  ....  18    15    12    9    6    3
            50    47    44    41  ....  17    14    11    8    5    2

        Note that pin 26 (TERMPWR) is connected to ground on part
        numbers 501-1205-09 or lower, 501-1322-01, 501-1334-01, and
        501-1345-01. This can cause a short if another device in the
        chain is providing termination power!

        The monochrome video output levels are ECL/TTL. The output can
        be switched between low resolution (1152 x 900 61.8KHz
        horizontal sync, 66Hz vertical sync) and high resolution (1600 x
        1280) via a jumper in J800. The pinout of the monochrome video
        connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
                                    9   GND

        Memory is in the form of up to 24 1Mx9 SIMMs, rated 100ns or
        faster, installed in groups of four starting with the SIMM slots
        nearest the back of the motherboard and moving forward. These
        SIMMs are part number 501-1239 and are the same kind used in IBM
        PC clones. Note that some users have experienced problems with
        three-chip SIMMs (as opposed to nine-chip SIMMs) -- see Misc Q&A
        #17. The amount of memory seen is controlled by part of J800.

        There is one jumper block and various points of interest. All
        locations are given with component side up and connector side
        toward you.

        J800 (toward far left corner, pin 1 at left)
         1-2    jump for 4M RAM or more installed
         3-4    jump for 8M RAM or more installed
         5-6             12M
         7-8             16M
         9-10            20M
         11-12           24M
         13-14  jump for AUI Ethernet, unjump for thin
                 Ethernet/autoselect
         15-16  jump for high resolution video, unjump for normal
                 resolution/autoselect. Note that the video cable must
                 be 530-1539 or 530-1336 and the monitor must be
                 540-1427 Motorola revision T or later for autoselect to
                 operate.

        Additional features of interest: the Ethernet fuse is in the far
        left corner by the 3V battery, at grid J39. The IDPROM is at
        location U224 (grid I20) in the leftish middle. The boot PROM is
        at location U300 (grid K8) on the left side in the middle. The
        8530 UARTs are also on the left side, toward the near end from
        the boot PROM. The keyboard fuse is in the near left corner by
        the keyboard connector at grid K1. The P4A and P4B connectors
        are on the right side on either side of the middle bar.

        Note that boot ROM version 1.6 is required to boot from a QIC-24
        tape.

        Power requirements are +5V @ 11/13.5A typical/max, -5.2V @
        0.3/0.5A typical/max, and +12V @ 0.3/0.5A typical/max. (The FE
        manual lists +5V @ 10.1A for models with framebuffers and 8.9A
        without, -5V @ 0.7A for models with framebuffers and 0.3A
        without, and doesn't list +12V at all.)

501-1206        3/2xx CPU VME
        See 501-1100.

501-1207        3/50 motherboard with FPU
        Same as 501-1075 except the 68881 is factory-installed.

501-1208        3004 "Carrera" CPU VME 4M (3/75/140/150/160/180)
        16.67MHz 68020, 68881, Sun-3 MMU with eight hardware contexts,
        4M of onboard memory. VME bus interface.

        From left to right with component side up and connector edge
        toward you (normal top edge at left), the rear edge has: a
        female DB15 AUI Ethernet connector; eight LEDs (bit 0 to the
        top/left); a switch to toggle between Normal and Diagnostics
        modes; a reset switch; a female DB9 monochrome video connector;
        a female DB15 keyboard/mouse connector; and two female DB25
        serial port connectors (ports A and B from left to right
        (top/bottom)).

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        Jumpers J2501 and J2503 relate to Ethernet. The pinout of
        the AUI Ethernet connector is:

            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            5   E.RxD+              12  E.RxD-
            6   GND                 13  +12V

        The eight LEDs are used for diagnostic purposes.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM" (labelled "BOOT" on some early versions). If
        you want extended diagnostics when you power up the system, set
        the switch to the "DIAG" position. If the switch is set to
        "DIAG", power-on self-test messages are sent to serial port A.

        The user reset button invokes a watchdog reset. The result
        depends on the value at address 0x17 of the EEPROM. (?)

        The monochrome video output levels are ECL/TTL, with a
        resolution of 1152 x 900 at 61.8KHz horizontal sync and 66Hz
        vertical sync. The pinout of the monochrome video connector is:

            1   VIDEO+              6   VIDEO-
            3   HSYNC               7   GND
            4   VSYNC               8   GND
                                    9   GND

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The documented maximum speeds are 19200 bps for
        output and 9600 bps for input. The pinout of the serial ports
        is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        There are a variety of jumper blocks, many of which (oddly) have
        separate designations for each pair of pins. Locations below are
        given with component side up and connector edge toward you.

        J100 (pins 5-6 of a block on the left side, beyond the 68881)
          "Cache disable".                                      UNJUMPED

        J300 (block in far left corner, pin 1 nearest)
          1-2   unused
          3-4   VME interrupt level 1                           JUMPED
          5-6   VME interrupt level 2                           JUMPED
          7-8   VME interrupt level 3                           JUMPED
          9-10  VME interrupt level 4                           JUMPED
          11-12 VME interrupt level 5                           JUMPED
          13-14 VME interrupt level 6                           JUMPED
          15-16 VME interrupt level 7                           JUMPED

        J400 (block toward far left corner, pin 1 nearest)
          1-2   16.67MHz CPU clock                              JUMPED
          3-4   12.5MHz CPU clock                               UNJUMPED
          5-6   12.5MHz FPU clock                               UNJUMPED
          7-8   16.67MHz FPU clock                              JUMPED

        J1001 (single jumper in middle right)
          Jump to enable SCC clock.                             JUMPED

        J1200 (pins 4-5 of block in near left corner)
          Jump for 27256 boot PROMs.                            UNJUMPED

        J1201 (pins 5-6 of block in near left corner)
          Jump for 27512 boot PROMs.                            JUMPED

        J2301 (single jumper in near middle, to right of divider)
          Jump to enable video clock.                           JUMPED

        J2501 (pins 1-2 of block in near left)
          Jump to enable Ethernet clock.                        JUMPED

        J2502 (pins 1-2 of block in near left corner)
          Jump to enable VME clock.                             JUMPED

        J2503 (pins 3-4 of block in near left)
          Jump for a type-1 Ethernet transceiver, unjump for a type-2.

        J2505 (pins 7-8 of a block on the left side, beyond the 68881)
          Unused.

        J2700-J2703 (block in far left, pin 1 nearest)
          1-2   J2703, jump to enable VME reset master          JUMPED
          3-4   J2702, jump to enable VME reset slave           UNJUMPED
          5-6   J2701, jump to enable VME request/arbiter       JUMPED
          7-8   J2700, jump to enable VME request only          UNJUMPED

        J3101 (pins 1-2 of block on the left side, beyond the 68881)
          Jump for 2M CPU.                                      JUMPED

        J3102 (pins 3-4 of block on the left side, beyond the 68881)
          Jump for 4M CPU.                                      JUMPED

        Additional features of interest: the boot PROM is on the near
        left side at location U1200 (grid C5). The IDPROM is
        catty-corner from the boot PROM at location U1409 (grid B10).
        The keyboard fuse is by the reset switch at grid A16. The
        Ethernet fuse is by the boot PROM at grid C8.

        Note that boot PROM version 1.8 is required to boot from a
        QIC-24 tape. Boot PROM version 2.6 is required to boot from a
        QIC-24 tape in a Sun-2 shoebox. Boot PROM version 2.6 is also
        required to boot from an SMD disk attached to a Xylogics 7053
        SMD controller.

        Note that CPU revisions 501-1208-04 and lower may fail with
        non-Sun boards. Use 501-1208-05 or greater.

        Power requirements are +5V @ 14.6A, -5V @ 0.8A.

501-1209        3/110 CPU VME
        See 501-1134.

501-1237        4/1xx CPU VME 8M with FPU
        See 501-1199.

501-1241        386i/150 motherboard
        20MHz 80386 and 80387, 80386 on-board MMU. Four 32-bit
        proprietary slots, four ISA bus slots (three 16-bit/AT, one
        8-bit/XT).

        From left to right, with component side up and connectors AWAY
        from you, the connector edge has: a male DB25 serial connector;
        a parallel port connector; eight LEDs (bit 0 to the left); and a
        female DB15 AUI Ethernet connector.

        There is a set of three jumpers near to 80387 in the near right,
        with jumper 0 farthest away:

                0       1       2        mode
               ----    ----    ----     --------------------------------
                UN      UN      UN      Normal. Self-test is executed.
                                         Memory tested is determined by
                                         the NVRAM setting.
                JU      UN      UN      Diagnostic. Self-test is
                                         executed. All memory is tested.
                                         Status sent to the serial port
                                         until all video hardware tests
                                         OK.
                UN      UN      JU      Manufacturing. Diagnostic mode
                                         continuous loop.
                JU      UN      JU      Bypass. Bypasses most of normal
                                         self-test.

        Additional features of interest: in the far left beyond the ISA
        slots are five voltage test points (+5, GND, +12, -12, and -5
        from left to right). In the far center are the boot PROM at
        location U602, the time-of-day/NVRAM chip at U603, and the
        IDPROM at U601. Next to the IDPROM is the SCSI connector, with
        pin 1 in the far left. In line but nearer is the floppy
        data/control connector, with pin 1 in the near right. The power
        supply connector is along the right edge just beyond the jag in
        the edge. Along the jag is the floppy/disk power connector (four
        pins, pin 1 at right), and somewhat nearer are the fan power
        connector (two pins, pin 1 at left) and the front panel LED
        power connector (three pins, pin 1 farthest). In the near left
        corner is the speaker connector (three pins, pin 1 farthest).
        The Ethernet fuse is near the serial and parallel connectors,
        and the SCSI fuse is near the SCSI connector. Both fuses are 1A
        subminiature fuses, P/N 140-1027.

        Note that boot PROM version 4.4 is required to use monochrome
        framebuffer 501-1433.

        Note that 501-1241-04 Rev 01 or later or 501-1414-01 Rev A or
        later is required to use dynamic memory boards 501-1394,
        501-1441, or 501-1423.

        Note that the Ethernet is permanently set for type-2
        (transformer-coupled) transceivers.

        Power requirements are +5V @ 5.8A.

501-1274        4/2xx CPU VME with FPC-6/4
        16.67MHz SF9010, Weitek 1164/1165, Sun-4 MMU with 16 hardware
        contexts. VME bus interface.

        From left to right, with component side up and connector edge
        toward you (normal top edge at left), the rear edge of the board
        has: two serial ports (A and B from left to right (top/bottom));
        an Ethernet connector; a switch to toggle between Normal and
        Diagnostic modes; eight LEDs (bit 0 to the right/bottom); a
        reset button; a keyboard connector; and a video connector.

        The video output is high-resolution ECL/TTL monochrome at 1600 x
        1280, with 89KHz horizontal sync and 66Hz vertical sync.

        There are a variety of jumper blocks, many of which (oddly) have
        separate designations for each pair of pins. Locations below are
        given with component side up and connector edge toward you.

        J0301 (one pair in block in leftish center, by U2004 PROM)
          "External clock clock."                               UNJUMPED

        J0302 (one pair in block in leftish center, by U2004 PROM)
          46.153MHz clock enable.                               JUMPED

        J0303 (one pair in block in leftish center, by U2004 PROM)
          16MHz clock enable.                                   JUMPED

        J0304 (single jumper in leftish center, by U2003 PROM)
          VME clock enable.                                     JUMPED

        J0401 (block in far left)
          1-2   unused
          3-4   VME interrupt level 1                           JUMPED
          5-6   VME interrupt level 2                           JUMPED
          7-8   VME interrupt level 3                           JUMPED
          9-10  VME interrupt level 4                           JUMPED
          11-12 VME interrupt level 5                           JUMPED
          13-14 VME interrupt level 6                           JUMPED
          15-16 VME interrupt level 7                           JUMPED

        J2001 (farthest pair in block in far left, by U2001 PROM)
          Select 27512 PROMs.                                   JUMPED

        J2002 (middle pair in block in far left, by U2001 PROM)
          Select 27256 PROMs.                                   UNJUMPED

        J2003 (single jumper in near left)
          Connect 3V battery.                                   JUMPED

        J2201 (single jumper in near left, by battery)
          SCC (UART) clock enable.                              JUMPED

        J2401 (nearest pair in block in far left, by U2001 PROM)
          CPU is VME requester only                             UNJUMPED

        J2402 (rightmost pair in block in far center)
          CPU is arbiter/requester                              JUMPED

        J2403 (middle pair in block in far center)
          CPU is reset slave                                    UNJUMPED

        J2404 (leftmost pair in block in far center)
          CPU is reset master                                   JUMPED

        J2701 (single jumper in near middle, by LEDs)
          Debug jumper.                                         UNJUMPED

        J2801 (single jumper in far left)
          Enable system DVMA.                                   JUMPED

        J2902 (single jumper in leftish nearish middle)
          Jump for type-1 Ethernet transceiver, unjump for type-2.

        J2904 (location unknown, does not appear on diagram)
          "Null."                                               UNJUMPED

        Additional features of interest: the four boot PROMs form a line
        in the middle of the left half of the board, U2001-U2004
        (1507-1504, farthest to nearest, respectively). The IDPROM is
        near the U2004 PROM, at location U1901. The 3V battery is along
        the near edge near serial port B. The Ethernet fuse is in the
        near right, near the Weitek chips, at grid C29. The keyboard
        fuse is near the keyboard connector at grid A26.

        Note that 501-1274 boards must be 501-1274-12 or later to use a
        type-4 keyboard. Also, they must be 501-1274-13 or later to use
        a Xylogics 7053 SMD disk controller.

        The boot ROM version must be 1.7 or later to boot from an SMD
        disk connected to a Xylogics 7053 SMD disk controller. Also, the
        boot ROM version must be 3.0 or later when more than two 16M
        memory boards are used.

        Power requirements are +5V @ 17.2A, -5V @ 1.3A, and +12V @ 0.4A.

501-1299        3/4xx CPU VME
        33MHz 68030 and 68882, 68030 on-board MMU. VME bus interface.

        From left to right, with component side up and connector edge
        toward you (normal top edge at left), the rear edge of the board
        has: eight LEDs (bit 0 at the top/left); a reset button; a
        switch to toggle between Normal and Diagnostic modes; a female
        DB15 AUI Ethernet connector; two female DB25 serial ports (A and
        B from left to right (top/bottom)); and a female DB15
        keyboard/mouse connector.

        The user reset button invokes a watchdog reset. The result
        depends on the value at address 0x17 of the EEPROM. (?)

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM". If you want extended diagnostics when you
        power up the system, set the switch to the "DIAG" position. If
        the switch is set to "DIAG", power-on self-test messages are
        sent to serial port A at 9600 bps or serial port B at 1200 bps.

        Jumper J2501 affects Ethernet. The pinout of the AUI Ethernet
        connector is:

            1   chassis ground      6   GND
            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            4   chassis ground      12  E.RxD-
            5   E.RxD+              13  +12V

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The pinout of the serial ports is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  -5V

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        There are a variety of jumper blocks. Locations below are given
        with component side up and connector edge toward you.

        J100 (block along right edge toward far end)
         1-2    Enable 68030 cache                              UNJUMPED
         3-4    Enable 68030 MMU                                UNJUMPED

        J200 (block in middle just to left of divider, pin 1 nearest)
         1-2    Enable 68030 clock                              JUMPED
         3-4    unused
         5-6    unused
         7-8    Enable 50ns clock                               JUMPED

        J400 (block in middle right, pin 1 to left)
         1-2    Enable VME interrupt 1                          JUMPED
         3-4    Enable VME interrupt 2                          JUMPED
         5-6    Enable VME interrupt 3                          JUMPED
         7-8    Enable VME interrupt 4                          JUMPED
         9-10   Enable VME interrupt 5                          JUMPED
         11-12  Enable VME interrupt 6                          JUMPED
         13-14  Enable VME interrupt 7                          JUMPED
         15-16  unused

        J2000 (block in far middle, pin 1 nearest)
         1-2    Enable VME requester                            UNJUMPED
         3-4    Enable VME arbiter                              JUMPED
         5-6    VME-generated VME reset                         UNJUMPED
         7-8    CPU-generated VME reset                         JUMPED

        J2100 (block in far middle, by battery, pin 1 nearest)
         1-2    Enable VME system clock                         JUMPED
         3-4    Enable round-robin arbiter                      JUMPED

        J2501 (block in near middle, pin 1 to left)
         1-2    Enable Ethernet clock                           JUMPED
         3-4    unused
         5-6    Jump to select type-1 Ethernet transceiver, unjump for
                 type-2
         7-8    unused

        Additional features of interest: the IDPROM is in the near right
        at location U1701 (grid D33). The boot PROMs are at locations
        U1712 and U1713 (grid B34 and C34). The 3V battery is in the far
        middle. The P4 connector is in the middle right. The Ethernet
        fuse F2500 is by the Ethernet connector and the keyboard fuse
        F1800 is near serial port A.

        Note that any 501-1102 8M memory boards used with this CPU must
        be 501-1102-11 or later to use with the FPA or the FPA+.
        Additionally, the 501-1254 32M memory boards are not compatible.

        The CPU must be 501-1550-10 or later to work with the SunLink
        Channel Adapter.

        Power requirements are +5V @ 24.5A and +12V @ 0.3A.

501-1316        4/3xx CPU VME 8M
        25MHz CY7C601, TI8847, Sun-4 MMU with 16 hardware contexts. VME
        bus interface. P4 connector.

        From left to right, with component side up and connector edge
        toward you (normal top edge at left), the rear edge of the board
        has: a SCSI-2 connector; an Ethernet connector; four serial
        ports (D, C, B, and A from left to right (top/bottom)), of which
        A seems to be DB25 and B-D DB9; a keyboard connector; eight LEDs
        (bit 0 to the left/top); and a switch to toggle between
        Diagnostic and Normal modes.

        There are a variety of jumper blocks. Locations below are given
        with component side up and connector edge toward you.

        J0200 (block in near middle, pin 1 to left)
          1-2   FPC normally low                                JUMPED
          3-4   FPC normally low                                JUMPED
          5-6   FPC normally high                               UNJUMPED

        J0900 (single jumper in center, by crystal)
          Jump to enable sysclock.                              JUMPED

        J1900 (single jumper in farish center, near SIMMs)
          Jump for 4M SIMMs, unjump for 1M SIMMs.

        J2100 (single jumper in nearish left, near PROMs)
          Jump for 27512 PROMs.                                 JUMPED

        J2100 (single jumper in nearish left, near PROMs)
          Jump for 27256 PROMs.                                 UNJUMPED

        J2302 (three-pin jumper in near middle, pin 1 to left)
          1-2   Ports A/B RS-232 (+12V)                         JUMPED
          2-3   Ports A/B RS-423 (+5V)                          UNJUMPED

        J2303 (three-pin jumper in near middle, pin 1 to left)
          1-2   Ports A/B RS-232 (-12V)                         JUMPED
          2-3   Ports A/B RS-423 (-5V)                          UNJUMPED

        J2400 (single jumper in near right)
          Jump to enable serial port clock.                     JUMPED

        J2402 (three-pin jumper in near right corner)
          1-2   Mouse TD enabled                                UNJUMPED
          2-3   Mouse TD grounded                               JUMPED

        J2502 (three-pin jumper in near middle, pin 1 to left)
          1-2   Ports C/D RS-232 (+12V)                         JUMPED
          2-3   Ports C/D RS-423 (+5V)                          UNJUMPED

        J2503 (three-pin jumper in near middle, pin 1 to left)
          1-2   Ports C/D RS-232 (-12V)                         JUMPED
          2-3   Ports C/D RS-232 (-5V)                          UNJUMPED

        J2701 (single jumper in far left corner)
          "Disable VME loopback."                               UNJUMPED

        J2800 (single jumper in far left corner)
          Enable VME reset out                                  JUMPED

        J2801 (single jumper in far left)
          Enable VME arbiter                                    JUMPED

        J2803 (single jumper in far left corner)
          Enable VME reset in                                   UNJUMPED

        J2900 (single jumper in far left corner)
          Enable 16MHz VME clock                                JUMPED

        J3001 (block in far left)
          1-2   unused
          3-4   Enable VME interrupt level 1                    JUMPED
          5-6   Enable VME interrupt level 2                    JUMPED
          7-8   Enable VME interrupt level 3                    JUMPED
          9-10  Enable VME interrupt level 4                    JUMPED
          11-12 Enable VME interrupt level 5                    JUMPED
          13-14 Enable VME interrupt level 6                    JUMPED
          15-16 Enable VME interrupt level 7                    JUMPED

        J3100 (single jumper in middlish left edge)
          Jump to enable 32MHz clock.                           JUMPED

        J3101 (single jumper in far left edge)
          Jump to enable 48MHz clock.                           JUMPED

        Memory is in the form of up to eight 1M or 4M x 9 30-pin SIMMs
        in two banks in the far right, U1300-U1307 from nearest to
        farthest. The nearer four are bank 0, bytes 0-3, and the farther
        four are bank 1, bytes 0-3. Nearby jumper J1900 controls whether
        the SIMMs are 1M or 4M. The 1M SIMMs are 501-1408, 501-1466
        (same as 4/1xx), 501-1544, 501-1565, and 501-1697. The 4M SIMMs
        are 501-1682 and 501-1739. 4M SIMMs are "not supported on the
        Sun-4/330 CPU" and require boot PROM version 3.0.3 or later.

        Additional features of interest: the boot PROMs are in a group
        in the near left, with U2101, U2103, U2102, and U2100 in that
        order clockwise from the far left. The IDPROM is in the near
        right corner at location U2202. The time-of-day/NVRAM chip is in
        the middle of the left edge, at location U2200. There is a large
        jumper bock J2000 in the far left (internal SCSI connector?).
        The P4 connector is by the SIMMs, just nearer. The SCSI fuse
        F3200 and Ethernet fuse F3100 are by the SCSI and Ethernet
        connectors respectively. The keyboard fuse F0300 is by the LEDs.
        All three fuses are 150-1174, 2A.

        Note that the CPU is permanently set for type-2 Ethernet
        transceivers.

        Note that 501-1316-04 and later is required to use the ISP-80 or
        FDDI controllers, and to run LISP software. Also, 501-1316-03 or
        later is required to use the cg5 framebuffer.

        Note that boot PROM version 3.0 or later is required to boot
        from the 60M quarter-inch tape drive in the Mass Storage
        Subsystem. Also, boot PROM version 3.0.1 or later is required to
        boot from a tape drive on a secpmd SCSI controller. Boot PROM
        version 3.0.3 or later is required to use 4M SIMMs.

        To provide circuit protection to the M+ and M- (+-12V) inputs on
        the UC5170 serial port liner driver, install fused shunts
        150-1669 at locations J2302, J2303, J2502, and J2503.

        Power requirements are +5V @ 17.5A, +12V @ 0.2A, and -12V @
        0.2A.

501-1322        3/60 motherboard 4M w/o mono
        See 501-1205.

501-1324        386i/250 motherboard
        25MHz 80386 and 80387, 80386 on-board MMU. Four 32-bit
        proprietary slots, four ISA bus slots (three 16-bit/AT, one
        8-bit/XT).

        From left to right, with component side up and connectors AWAY
        from you, the connector edge has: a male DB25 serial connector;
        a parallel port connector; eight LEDs (bit 0 to the left); and a
        female DB15 AUI Ethernet connector.

        There is a set of three jumpers near to 80387 in the near right,
        with jumper 0 farthest away:

                0       1       2        mode
               ----    ----    ----     --------------------------------
                UN      UN      UN      Normal. Self-test is executed.
                                         Memory tested is determined by
                                         the NVRAM setting.
                JU      UN      UN      Diagnostic. Self-test is
                                         executed. All memory is tested.
                                         Status sent to the serial port
                                         until all video hardware tests
                                         OK.
                UN      UN      JU      Manufacturing. Diagnostic mode
                                         continuous loop.
                JU      UN      JU      Bypass. Bypasses most of normal
                                         self-test.

        Additional features of interest: in the far left beyond the ISA
        slots are five voltage test points (+5, GND, +12, -12, and -5
        from left to right). In the far center are the boot PROM at
        location U602, the time-of-day/NVRAM chip at U603, and the
        IDPROM at U601. Next to the IDPROM is the SCSI connector, with
        pin 1 in the far left. In line but nearer is the floppy
        data/control connector, with pin 1 in the near right. The power
        supply connector is along the right edge just beyond the jag in
        the edge. Along the jag is the floppy/disk power connector (four
        pins, pin 1 at right), and somewhat nearer are the fan power
        connector (two pins, pin 1 at left) and the front panel LED
        power connector (three pins, pin 1 farthest). In the near left
        corner is the speaker connector (three pins, pin 1 farthest).
        The Ethernet fuse is near the serial and parallel connectors,
        and the SCSI fuse is near the SCSI connector. Both fuses are 1A
        subminiature fuses, P/N 140-1027.

        Note that boot PROM version 4.4 is required to use monochrome
        framebuffer 501-1433.

        Note that the Ethernet is permanently set for type-2
        (transformer-coupled) transceivers.

        Power requirements are +5V @ 5.8A.

501-1334        3/60 motherboard 0M with mono
        See 501-1205.

501-1345        3/60 motherboard 0M w/o mono
        See 501-1205.

501-1378        3/60LE motherboard
        20MHz 68020, 20MHz 68881 floating point chip, Sun-3 MMU with
        eight hardware contexts, up to 12M on-board SIMM memory. No bus
        interface, but a P4 connector for a color video board or other
        option -- not the same as the P4 in the 3/80 or any SPARC model.

        From left to right, the back edge of the board has: a female
        DB15 keyboard/mouse connector; eight LEDs (bit 0 to the right);
        a switch to toggle between Normal and Diagnostics modes; a BNC
        thin Ethernet connector; a female DB15 AUI Ethernet connector;
        two female DB25 serial port connectors (ports B and A from left
        to right); and a female D50 SCSI port connector. Above these are
        an upper row of cutouts or connectors for color video and other
        options.

        Pin 1 is usually in the upper right corner of all connectors.
        Unconnected pins are not listed.

        The pinout of the keyboard/mouse connector is:

            1   RxD0 (keyboard)     8   GND
            2   GND                 9   GND
            3   TxD0 (keyboard)     10  VCC
            4   GND                 11  VCC
            5   RxD1 (mouse)        12  VCC
            6   GND                 14  VCC
            7   TxD1 (mouse)        15  VCC

        The eight LEDs are used for diagnostic purposes. In the chart
        below, a "1" indicates a lit LED, and a "0" indicates an unlit
        LED. The pattern is shown right to left, as it appears on the
        LEDs.

            Pattern     Status
            --------    ------
            11111111    Resetting
            00000001    PROM checksum test
            00000011    Context register test
            00000100    Segment map read/write test
            00000101    Segment map address test
            00000110    Page map test
            00000111    Memory path data test
            00001000    Nonexistent memory bus error test
            00001001    Interrupt test
            00001010    Time-Of-Day clock interrupt test
            00001011    MMU protection/status tests
            00001110    Parity error test #1
            00001111    Parity error test #2
            00010000    Memory test
            10000000    Self-tests have found an error
            01000000    An exception class error occurred

        "Marching ones" (cycling through 10000000, 01000000, 00100000,
        etc.) indicates that Unix is running OK. On power up, it cycles
        through the tests in the chart above, then boots Unix. If LED 7
        (10000000) lights up while the tests are being performed, it
        indicates that the test failed. If LED 6 (01000000) lights up
        with the tests are being performed, it indicates that an
        unexpected error (bus error, address error, unexpected
        interrupt, etc.) occurred during the test. When all tests are
        finished, LED 5 (00100000) starts blinking to indicate that the
        ROM monitor is running and/or Unix is booting.

        If you want the machine to boot normally, set the diagnostics
        switch to "NORM". If you want extended diagnostics when you
        power up the system, set the switch to the "DIAG" position. If
        the switch is set to "DIAG", power-on self-test messages are
        sent to serial port A at 9600 bps, 8 data bits, one stop bit, no
        parity, and XON/XOFF flow control.

        Whether the BNC or AUI Ethernet connector is use is controller
        by part of J800. The pinout of the AUI Ethernet connector is:

            1   chassis ground      7   VCC
            2   E.COL+              9   E.COL-
            3   E.TxD+              10  E.TxD-
            4   chassis ground      12  E.RxD-
            5   E.RxD+              13  +12V
            6   GND

        The serial ports conform to both RS-232-C and RS-423 and are
        wired DTE. The pinout of the serial ports is:

            2   TxD (transmit data)     8   DCD   (Data Carrier Detect)
            3   RxD (receive data)      15  DB    (transmit clock from DCE)
            4   RTS (Request To Send)   17  DD    (receive clock from DCE)
            5   CTS (Clear To Send)     20  DTR   (Data Terminal Ready)
            6   DSR (Data Set Ready)    24  DA    (transmit clock from DTE)
            7   GND                     25  VERR  (-5V)

        The DB, DD, and DA signals are not used with ordinary
        asynchronous equipment such as most modems and terminals,
        printers, etc.).

        The pinout of the SCSI connector is:

            1   GND         17  GND         34  GND
            2   data bus 0  18  data parity 35  GND
            3   GND         19  GND         36  busy
            4   data bus 1  20  GND         37  GND
            5   GND         21  GND         38  acknowledge
            6   data bus 2  22  GND         39  GND
            7   GND         23  GND         40  reset
            8   data bus 3  24  GND         41  GND
            9   GND         25  GND???      42  message
            10  data bus 4  26  TERMPWR     43  GND
            11  GND         27  GND         44  select
            12  data bus 5  28  GND         45  GND
            13  GND         29  GND         46  command/data
            14  data bus 6  30  GND         47  GND
            15  GND         31  GND         48  request
            16  data bus 7  32  attention   49  GND
                            33  GND         50  input/output

        and the pattern of the pins is:

            49    46    43  ....  19    16    13    10    7    4    1
               48    45    42  ....  18    15    12    9    6    3
            50    47    44    41  ....  17    14    11    8    5    2

        Memory is in the form of up to 16 256K SIMMs (501-1349),
        installed in groups of four starting with the SIMM slots nearest
        the back of the motherboard and moving forward, followed by up
        to 8 1M SIMMs (501-1346). The amount of memory seen is
        controlled by part of J800.

        There is one jumper block and various points of interest. All
        locations are given with component side up and connector side
        toward you.

        J800 (toward far left corner, pin 1 at left)
         1-2    jump for 8M RAM (or less?) installed
         3-4    jump for more than 8M RAM installed
         5-6    unused
         7-8    unused
         9-10   unused
         11-12  unused
         13-14  jump for AUI Ethernet, unjump for thin
                 Ethernet/autoselect
         15-16  unused

        Additional features of interest: the Ethernet fuse is in the far
        left corner by the 3V battery. The IDPROM is at location U224
        (grid I20) in the leftish middle. The boot PROM is at location
        U300 (grid K8) on the left side in the middle. The 8530 UARTs
        are also on the left side, toward the near end from the boot
        PROM. The keyboard fuse is in the near left corner by the
        keyboard connectorat grid K1. The P4A connector is on the right
        side near the middle bar.

        Note that boot ROM version 1.6 is required to boot from a QIC-24
        tape (?).

501-1381        4/4xx CPU VME
        33MHz CY7C601, TI8847 (?), MMU with 64 hardware contexts. VME
        bus interface. P4 connector.

        From left to right, with component side up and connector edge
        toward you (normal top edge at left), the rear edge of the board
        has: two serial connectors (ports A and B from left to right
        (top/bottom)); a keyboard connector; an Ethernet connector; a
        switch to toggle between Normal and Diagnostic modes; eight LEDs
        (bit 0 to th left/top); and a reset switch.

        There are a variety of jumper blocks. Locations below are given
        with component side up and connector edge toward you.

        J0100 (10-pin block in nearish center)
          Used for debug. All unjumped.

        J0101 (single jumper in rightish center)
          Used for ATE.                                         JUMPED

        J0201 (single jumper in middle near edge)
          Used for ATE.                                         JUMPED

        J0300 (block in near right corner, pin 1 nearest)
          1-2   jump if FPC is present                          JUMPED
          3-4   unjumped if FPC is present                      UNJUMPED
          5-6   avoid a trap when I-flush instruction executed  JUMPED
          7-8   FPC chaining (only if FPC present)              UNJUMPED

        J0705 (10-pin block in far right)
          Used for debug. All unjumped.

        J1901 (36-pin block in nearish right)
          Used for debug. All unjumped.

        J2301 (single jumper in middle far edge)
          Enable 33MHz system clock.                            JUMPED

        J2600 (single jumper in rightish far edge)
          Used for debug.                                       UNJUMPED

        J2801 (single jumper in farish left edge)
          Disable VME arbiter.                                  UNJUMPED

        J2802 (single jumper in farish left edge)
          Enable VME arbiter.                                   JUMPED

        J2803 (single jumper in farish left edge)
          Allow VME to reset CPU.                               UNJUMPED

        J2804 (single jumper in farish left edge)
          Allow CPU to reset VME.                               JUMPED

        J3100 (single jumper in left far edge)
          Enable VME loopback.                                  UNJUMPED

        J3200 (single jumper in middle left edge)
          Enable 16MHz Ethernet clock.                          JUMPED

        J3201 (single jumper in leftish center)
          Jump for type-1 Ethernet transceiver, unjump for type-2.

        J3203 (single jumper in far left)
          Provide VME clock.                                    JUMPED

        J3603 (three-pin jumper in near left corner, pin 1 nearest)
          1-2   RS-423 (-5V)                                    UNJUMPED
          2-3   RS-232 (-12V)                                   JUMPED

        J3604 (three-pin jumper in near left corner, pin 1 at right)
          1-2   RS-423 (+5V)                                    UNJUMPED
          2-3   RS-232 (+12V)                                   JUMPED

        J3701 (single jumper in near left)
          Jump to provide 4.9152MHz SCC clock.                  JUMPED

        J3703 (three pin jumper in middle near edge, pin 1 in middle?)
          1-2   Mouse TD enabled                                UNJUMPED
          2-3   Mouse TD grounded                               JUMPED

        J4000 (block in far left, pin 1 nearest)
          1-2   VME IRQ 1                                       JUMPED
          3-4   VME IRQ 2                                       JUMPED
          5-6   VME IRQ 3                                       JUMPED
          7-8   VME IRQ 4                                       JUMPED
          9-10  VME IRQ 5                                       JUMPED
          11-12 VME IRQ 6                                       JUMPED
          13-14 VME IRQ 7                                       JUMPED
          15-16 unused

        J4600 (single jumper in near left)
          Used for ATE.                                         JUMPED

        J4602 (single jumper in leftish center)
          Used for ATE.                                         JUMPED

        J4604 (single jumper in center)
          Used for ATE.                                         JUMPED

        J4605 (single jumper in left farish)
          Used for ATE.                                         JUMPED

        J4606 (single jumper in far right)
          Used for ATE.                                         JUMPED

        J4607 (single jumper in far leftish)
          Used for ATE.                                         JUMPED

        J4609 (single jumper in middle left edge)
          Used for ATE.                                         JUMPED

        Additional features of interest: the boot PROMs are in a
        row in the far right, U3501-U3504 from left to right (3-0
        respectively). The IDPROM is in the near right at location
        U1404. The P4 connector is nearer than the boot PROMs. The NVRAM
        chip is in the near left, by the divider. The keyboard fuse
        F3701 is in the near left and the Ethernet fuse F3200 in the
        near middle.

        Note that pin 25 of the serial ports on the 501-1381 is -5V out.
        Pin 25 of the serial ports on the 501-1899 is not connected.

        Note that the 501-1381 is not supported in the 4/470 serial
        numbers 136Kxxxx and greater. This chassis has two 50-pin SCSI-2
        connectors on the rear EMI cover.

        Note that SNC 1.2 for Solaris 1.1 requires 501-1381-01 or
        501-1899-01.

        To provide circuit protection to the M+ and M- (+-12V) inputs on
        the UC5170 serial port liner driver, install fused shunts
        150-1669 at locations J3603 and J3604.

        Power requirements are +5V @ 28.7A, +12V @ 0.1A, and -12V @
        0.1A.

501-1382        4/60 (SPARCstation 1) motherboard
        <= 501-1382-12  4M w/o FPU
        >= 501-1382-13  8M w/FPU
        >= 501-1382-14  8M w/FPU FCC-B

        20MHz MB86901A or LSI L64801, Weitek 3170, Sun-4c MMU with 8
        hardware contexts. 20MHz SBus, slot 3 is slave-only.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports A and B from left to right); an 8-pin-DIN
        keyboard/mouse connector; an audio connector; and a headphone
        connector.

        Connector pinouts and form factors are not known.

        Memory consists of up to sixteen 1M (501-1408) or 4M (501-1625
        or 501-1739) x 9 30-pin 80 or 100ns SIMMs, in four banks. Banks
        must be filled in the order 0, 2, 1, 3, and SIMM types may not
        be mixed within banks.

                Nearest disk connectors
                 _______     _______
                |       |   |       |
                |   0   |   |   1   |
                |       |   |       |
                |_______|   |_______|

                 _______     _______
                |       |   |       |
                |   2   |   |   3   |
                |       |   |       |
                |_______|   |_______|

                Nearest SBus connectors

        The only jumper is J4, a block along the near right edge,
        described only as "SAX" and apparently all pins jumped by
        default.

        Additional features of interest: the boot PROM is in the near
        middle at location U0837. The NVRAM/TOD/ID chip is to the left
        of the boot PROM at location U089. At the far edge, more or less
        from left to right, are the power, floppy power, floppy,
        LED/speaker, and two pairs of internal SCSI and disk power
        connectors. In the near left corner are the SCSI (U2) and
        Ethernet (F071) fuses, and the keyboard fuse (F082) is in the
        rightish near edge. All fuses are 2A, P/N 150-1174.

        Note that the SPARCstation 1 was first supported in SunOS
        4.0.3c.

        Note that boards 501-1382-08 or later, or 501-1629-10 or later,
        and SPARC IU 100-1808-02 or later, are required for use with Sun
        Common LISP, AutoCAD, Cobol, and SunOS 4.1.

        Note that bug 1047696 in the installation of SunOS 4.1.1 and
        4.1.1 Rev B causes trouble when mixing 1M and 4M SIMMs.
        "Install the 4MB SIMMs in bank 0 when installing miniunix."

        Note that the 501-1667 Load Board should be installed in systems
        without disk drives or SBus cards.

        Note that boot PROM version 2.4 requires at least SunOS 4.1.1.

        Power requirements with eight 1M SIMMs are +5V @ 2.5A.

501-1401        3/80 motherboard
        20MHz 68030 and 68882, 68030 on-chip MMU. P4 connector for
        video.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports B and A from left to right, port B appears to
        be DB9 while A is DB25); a parallel port; and an 8-pin-DIN
        keyboard/mouse connector.

        Connector pinouts and form factors are not known.

        The sixteen SIMM slots are arranged in four groups of four.
        Electrically, there are four "banks," each of which is composed
        of one slot from each group:

                Back of machine (nearest SBus connectors)

         bits   -------U0606------ 0   0 --------U0604------- bits 8-15
          16-23 -------U0806------ 2   2 --------U0804-------
                -------U0703------ 1   1 --------U0701-------
                -------U0903------ 3   3 --------U0901-------

         bits   -------U0605------ 0   0 --------U0603------- bits 0-7
          24-31 -------U0805------ 2   2 --------U0803-------
                -------U0702------ 1   1 --------U0700-------
                -------U0902------ 3   3 --------U0900-------

                Front of machine (nearest disk connectors)

        Banks must be filled in order (0 through 3), and SIMM sizes (1M
        or 4M) must not be mixed with in a bank. Only 1M SIMMs
        (501-1408) are officially documented; 4M SIMMs can be used with
        boot PROM version 3.0.2 and later.

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        J020 (3-pin jumper in middle right edge, pin 1 to left)
         1-2    20MHz FPU clock                                 JUMPED
         2-3    40MHz FPU clock                                 UNJUMPED

        J043 (3-pin jumper in near middle, by serial port A, pin 1 nearest)
         1-2    RS-423 (-5V)                                    UNJUMPED
         2-3    RS-232 (-12V)                                   JUMPED

        J044 (3-pin jumper in near middle, by serial port A, pin 1 farthest)
         1-2    RS-232 (+12V)                                   JUMPED
         2-3    RS-423 (+5V)                                    UNJUMPED

        J045 (3-pin jumper in near right corner, pin 1 farthest)
         1-2    Mouse TD enabled                                UNJUMPED
         2-3    Mouse TD grounded                               JUMPED

        J1000 (single jumper in middle, near SIMMs)
         Jump to enable watchdog reset (test only)              UNJUMPED

        J1804 (block in near left corner, pin 1 to left)
         Unknown.

        Additional features of interest: the boot PROM is in the near
        right, at location U0204 (grid J3 C0). The NVRAM is also in the
        near right, at location U0205 (grid J7 B3). The SCSI fuse F1400
        (see below) is in the near left corner, beside the Ethernet fuse
        F1500. The keyboard fuse F0400 is in the near right corner. The
        power supply connector, the floppy control/data connector, and
        the floppy power connector are in the far left corner. Near the
        far edge are (from left to right) the LED/speaker connector, and
        two pairs of disk control/data (SCSI) and disk power connectors.
        The P4 connector is in the far right.

        Note that pin 38 of the SCSI port is fused (F1400) with a 1.5A
        fuse, P/N 150-1383. The Ethernet and keyboard fuses (F1500 and
        F0400) are 2A, P/N 150-1174.

        Note that 501-1401-07 and earlier boards do not meet the P4 bus
        specification. CPU boards 501-1401-10 and later and 501-1650
        have FCC-A approval.

        "Use SCSI terminator 150-1537."

        Power requirements are +5V @ 4.6A.

501-1413        386i/250 motherboard
        See 501-1324.

501-1414        386i/150 motherboard
        See 501-1241.

501-1462        4/1xx CPU VME 16M w/o FPU
501-1463        4/1xx CPU VME 16M with FPU
501-1464        4/1xx CPU VME 32M w/o FPU
501-1465        4/1xx CPU VME 32M with FPU
        See 501-1199.

501-1491        4/2xx CPU VME with FPU-2 2-hi backpanel
        See 501-1274.

501-1512        4/1xx CPU VME 8M w/o FPU
501-1513        4/1xx CPU VME 8M with FPU
501-1514        4/1xx CPU VME 16M w/o FPU
501-1515        4/1xx CPU VME 16M with FPU
501-1516        4/1xx CPU VME 32M w/o FPU
501-1517        4/1xx CPU VME 32M with FPU
        See 501-1199.

501-1522        4/2xx CPU VME with FPC-6/4 2-hi backpanel
        See 501-1274.

501-1550        3/4xx CPU VME
        See 501-1299.

501-1627        4/20 (SPARCstation SLC) motherboard
        20MHz MB86901A or LSI L64801.

        This board is an unusual shape because it is intended to slip
        into the vertical slot in the monitor case behind the tube. It
        slides in from the top, I believe with the component side facing
        toward the front of the machine (all left/right orientations
        below assume you are looking down on the board from the rear of
        the machine). There are six diagnostic LEDs on the top edge (bit
        0 away from the SIMMs, to the right). On the bottom edge is an
        edge connector which supplies power and connects the CPU to the
        external signal connectors.

        There are no jumpers.

        Memory consists of up to four 4M x 33 72-pin SIMMs (501-1676 or
        501-1698) in SIMM slots U0502, U0602, U0501, and U0601 in that
        order.

        Additional features of interest: the boot PROM is along the
        upper edge, toward the right, at location U1001. The NVRAM is to
        the left of the boot PROM at location U1011. SCSI fuse F0901 and
        Ethernet fuse F1101 are toward the right bottom, near the edge
        connector, and are both non-replaceable PTC devices.

        Note that the SLC was first supported in SunOS 4.0.3c.
        Additionally, CPU boards with the 53C90A SCSI controller require
        a patch to operate under 4.0.3c.

501-1629        4/60 (SPARCstation 1) motherboard
        <= 501-1629-12  4M w/o FPU
        >= 501-1629-13  8M w/FPU
        >= 501-1629-14  8M w/FPU FCC-B

        See 501-1382.

501-1632        4/65 (SPARCstation 1+) motherboard
        25MHz LSI L64801, Weitek 3172, Sun-4c MMU with 8 hardware
        contexts. 25MHz SBus, slot 3 is slave-only.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports A and B from left to right); an 8-pin-DIN
        keyboard/mouse connector; and an audio connector.

        Connector pinouts and form factors are not known.

        Memory consists of up to sixteen 1M (501-1408) or 4M (501-1625
        or 501-1739) x 9 30-pin 80 or 100ns SIMMs, in four banks. Banks
        must be filled in the order 0, 2, 1, 3, and SIMM types may not
        be mixed within banks.

                Nearest disk connectors
                 _______     _______
                |       |   |       |
                |   0   |   |   1   |
                |       |   |       |
                |_______|   |_______|

                 _______     _______
                |       |   |       |
                |   2   |   |   3   |
                |       |   |       |
                |_______|   |_______|

                Nearest SBus connectors

        The only jumper is J4, a block along the near right edge,
        described only as "SAX" and apparently all pins jumped by
        default.

        Additional features of interest: the boot PROM is in the near
        middle at location U0837. The NVRAM/TOD/ID chip is to the left
        of the boot PROM at location U089. At the far edge, more or less
        from left to right, are the power, floppy power, floppy,
        LED/speaker, and two pairs of internal SCSI and disk power
        connectors. In the near left corner are the SCSI (U2) and
        Ethernet (F071) fuses, and the keyboard fuse (F082) is in the
        rightish near edge. All fuses are 2A, P/N 150-1174.

        Note that the SPARCstation 1+ was first supported in SunOS
        4.0.3c.

        Note that bug 1047696 in the installation of SunOS 4.1.1 and
        4.1.1 Rev B causes trouble when mixing 1M and 4M SIMMs.
        "Install the 4MB SIMMs in bank 0 when installing miniunix."

        Note that the 501-1667 Load Board should be installed in systems
        without disk drives or SBus cards.

        Note that boot PROM version 2.4 requires at least SunOS 4.1.1.

        Power requirements with eight 1M SIMMs are +5V @ 3A.

501-1638        4/75 (SPARCstation 2) motherboard 16M FCC-A
        50MHz CY7C601 @ 40MHz, TI TMS390C601A (602A ?), Sun-4c MMU with
        16 hardware contexts. 20MHz SBus.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports A and B from left to right); an 8-pin-DIN
        keyboard/mouse connector; and an audio connector.

        Connector pinouts and form factors are not known.

        Memory consists of up to sixteen 4M x 9 80ns 30-pin SIMMs. The
        SIMM slots are arranged in four groups of four. Electrically,
        there are four "banks," each of which is composed of one slot
        from each group:

                Back of machine (nearest SBus connectors)

                -------U0311------ 0   0 -------U0322--------
        bits    -------U0312------ 1   1 -------U0321-------- bits
         24-31  -------U0313------ 2   2 -------U0320--------  0-7
                -------U0319------ 3   3 -------U0316--------

                -------U0309------ 0   0 -------U0307--------
        bits    -------U0310------ 1   1 -------U0308-------- bits
         16-23  -------U0314------ 2   2 -------U0315--------  8-15
                -------U0318------ 3   3 -------U0317--------

                Front of machine (nearest disk connectors)

        Banks must be filled in order (0 through 3).

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        J0705 (block along the near right edge)
         Described only as "SAX" and apparently all pins jumped by
         default.

        GND1 (single jumper in middle right edge)
         Unknown.

        GND2 (single jumper in nearish leftish)
         Unknown.

        GND3 (single jumper in near rightish)
         Unknown.

        (pair of horizontal three-pin jumpers in near left)
         Jump left two pins for RS232 serial ports, right two pins for
         RS423 serial ports.

        Additional features of interest: the boot PROM is in the near
        middle at location U0501. The NVRAM/TOD/ID chip is to the left
        of the boot PROM at location U0512. At the far left edge and the
        far edge, from left to right, are the floppy power, power,
        floppy, LED/speaker, and two pairs of internal SCSI and disk
        power connectors.

        Note that the SPARCstation 2 was first supported in SunOS
        4.1.1.

        Note that the 501-1667 Load Board should be installed in systems
        without disk drives or SBus cards.

        Power requirements with 16M of 4M SIMMs are +5V @ 3.6A.

501-1650        3/80 motherboard
        See 501-1401.

501-1656        4/1xx CPU 8M w/o FPU
        14.28MHz MB86900, Weitek 1164/1165 (if installed), Sun-4 MMU
        with 16 hardware contexts. VME bus interface (although busmaster
        cards are not supported). P4 connector for framebuffer.

        From left to right, with the component side up and the connector
        side toward you (normal top edge at the left), the rear edge of
        the board has: a keyboard connector; eight LEDs (bit 0 to the
        right/bottom); a switch to toggle between Normal and Diagnostic
        modes; an Ethernet connector; two serial ports (B and A from
        left to right (top/bottom)); a SCSI connector; and a reset (?)
        button.

        Memory consists of four banks of eight static-column 120ns
        SIMMs, either 256K (501-1314) or 1M (501-1466). Valid memory
        combinations are 8M (all banks 256K), 16M (two banks of 1M), 20M
        (two banks of 1M and two banks of 1M), or 32M (all banks 1M).

            Nearest VME connectors
             _______     _______
            |       |   |       |
            |   3   |   |   4   |             Banks have eight SIMM slots
            | U1516 |   | U1616 |             each.
            |_______|   |_______|   J400

             _______     _______              Note: when using mixed SIMMs
            |       |   |       | J1400       to get 20M, the 1M SIMMs must
            |   1   |   |   2   |             go in banks 2 and 4 or the
            | U1500 |   | U1600 | J1300       machine won't boot.
            |_______|   |_______|

             J100 1-2
                  3-4

        Total memory:           8M      16M     20M     32M
        SIMM size:              256K    1M      256K/1M 1M

        J100    Cache line
          1-2                   JU      UN      JU      UN
          3-4                   UN      JU      UN      JU

        J400    Memory strobe configuration (pin 1 farthest)
          1-2                   UN      JU      UN      JU
          3-4                   JU      UN      UN      JU
          5-6                   JU      JU      JU      UN

        J1300   SIMM addressing mode (pin 1 farthest)
          1-2   same            JU      UN      UN      JU
          3-4   different       UN      JU      JU      UN
          5-6   256K            JU      UN      JU      UN
          7-8   1M              UN      JU      UN      JU
          9-10  2M              UN      UN      UN      UN
          11-12 <32M            JU      JU      JU      UN
          13-14 32M             UN      UN      UN      JU
          15-16 unused          UN      UN      UN      UN

        J1400   SIMM addressing mode (pin 1 farthest)
          1-2   same            JU      UN      UN      JU
          3-4   different       UN      JU      JU      UN
          5-6   256K            JU      UN      UN      UN
          7-8   1M              UN      JU      JU      JU
          9-10  2M              UN      UN      UN      UN
          11-12 <32M            JU      JU      JU      UN
          13-14 32M             UN      UN      UN      JU
          15-16 unused          UN      UN      UN      UN

        There are a variety of other jumper blocks. Locations below are
        given with component side up and connector edge toward you.

        J101 (single jumper in center)
          Jump to enable 57.1MHz clock                          JUMPED

        J600 (block toward far right, pin 1 farthest)
          1-2   27512 boot PROMs                                JUMPED
          3-4   27256 boot PROMs                                UNJUMPED

        J700 (block in center, pin 1 farthest)
          1-2   VME interrupt level 1                           JUMPED
          3-4   VME interrupt level 2                           JUMPED
          5-6   VME interrupt level 3                           JUMPED
          7-8   VME interrupt level 4                           JUMPED
          9-10  VME interrupt level 5                           JUMPED
          11-12 VME interrupt level 6                           JUMPED
          13-14 VME interrupt level 7                           JUMPED
          15-16 unused

        J800 (single jumper in middle right, near P4 connector)
          Force reset.

        J900 (single jumper toward far right, by battery)
          Short 3V battery. (Erase EEPROM?)                     UNJUMPED

        J1000 (single jumper in middle right)
          Enable UART clock.                                    JUMPED

        J1700 (single jumper toward near right)
          Enable Ethernet clock.                                JUMPED

        J1701 (single jumper in near middle)
          Jump for type-1 Ethernet transceiver, unjump for type-2.

        J1800 (single jumper in near middle)
          Jump for AUI Ethernet, unjump for thin Ethernet/autosense.
          (? -- no BNC connector shown on diagram!)

        J1900 (block in center, pin 1 farthest)
          1-2   CPU is VME requester only                       UNJUMPED
          3-4   CPU is VME requester                            JUMPED

        J1901 (block in center, pin 1 farthest)
          1-2   CPU is VME reset slave                          UNJUMPED
          3-4   CPU is VME reset master                         JUMPED

        P2101 (single jumper toward far right)
          Jump to enable VME system clock.                      JUMPED

        Additional features of interest: the boot PROMs are in the far
        right corner at locations U601-U604 (1651-1654 respectively).
        Nearby, along the right edge, is a 3V battery. The P4 connector
        is in the middle right, by the divider. The IDPROM is nearer, at
        location U805. The keyboard fuse F1000 is near the keyboard
        connector at grid B2 and the Ethernet fuse F1800 is near the
        Ethernet connector at grid G2.

        Note that for the Ethernet autosense to operate, more than 30mA
        must be present on the +12V return.

        Power requirements (with FPU) are +5V @ 13.8A and -5V @ 0.1A.

501-1657        4/1xx CPU 8M with FPU
501-1658        4/1xx CPU 16M w/o FPU
501-1659        4/1xx CPU 16M with FPU
501-1660        4/1xx CPU 32M w/o FPU
501-1661        4/1xx CPU 32M with FPU
        See 501-1656.

501-1680        4/20 (SPARCstation SLC) motherboard
        See 501-1627.

501-1686        4/6xx motherboard VME 0M
        Up to two Mbus modules. 20MHz SBus.

        From left to right, with the component side up and the connector
        side toward you (normal top edge at the left), the rear edge of
        the board has: eleven LEDs (bit 0 to the right/bottom); a switch
        to toggle between Normal and Diagnostic modes; a "scan" button;
        two serial ports (A and B from left to right (top/bottom)); a
        keyboard/mouse connector; an audio connector; an Ethernet
        connector; and a 50-pin SCSI-2 connector.

        Memory consists of up to thirty-two 4M (501-1739) or 16M
        (501-2060) x 9 80ns 30-pin SIMMs in two banks of 16 each. Bank 0
        is on the left (starts with U1107, ends with U1401), bank 1 is
        on the right (starts with U1108, ends with U1402). Banks cannot
        be partially filled. The chart in the FE manual looks like this,
        for whatever it's worth:

                    Bank 0          Bank 1
                U????  LO/HI    U????  LO/HI            bits
        near    -----  -----    -----  -----            ----
         VME    U1401   7L1     U1402   7H1             56-63
                U1201   7L0     U1202   7H0             56-63
                U1403   6L1     U1404   6H1             48-55
                U1203   6L0     U1204   6H0             48-55
                U1405   5L1     U1406   5H1             40-47
                U1205   5L0     U1206   5H0             40-47
                U1407   4L1     U1408   4H1             32-39
                U1207   4L0     U1208   4H0             32-39

                U1301   3L1     U1302   3H1             24-31
                U1101   3L0     U1102   3H0             24-31
                U1303   2L1     U1304   2H1             16-23
                U1103   2L0     U1104   2H0             16-23
                U1305   1L1     U1306   1H1             8-15
                U1105   1L0     U1106   1H0             8-15
        near    U1307   0L1     U1308   0H1             0-7
         SBus   U1107   0L0     U1108   0H0             0-7
                          ^
                          | xx0 = LO byte, xx1 = HI byte

        There are a variety of jumpers. Locations below are given with
        component side up and connector edge toward you.

        J1701 (single jumper in far left)
         Jump to enable internal VME arbiter                            JUMPED

        J1702 (single jumper in far leftish)
         Jump to enable internal VME arbiter                            JUMPED

        J1703 (single jumper in far middle)
         Jump to enable internal VME arbiter                            JUMPED

        J1704 (single jumper in far rightish)
         Jump to enable internal VME arbiter                            JUMPED

        J1705 (single jumper in middle)
         Jump to disable internal VME arbiter                           UNJUMPED

        J1706 (3-pin jumper in leftish far edge, pin 1 nearest)
         1-2    Connect P1.SYSRST to VME.RST.IN
         2-3    Connect VME.RST.OUT to P1.SYSRST                        JUMPED

        J1801 (block in far right corner, pin 1 to left)
         1-2    Enable VME IRQ7                                         JUMPED
         3-4    Enable VME IRQ6                                         JUMPED
         5-6    Enable VME IRQ5                                         JUMPED
         7-8    Enable VME IRQ4                                         JUMPED
         9-10   Enable VME IRQ3                                         JUMPED
         11-12  Enable VME IRQ2                                         JUMPED
         13-14  Enable VME IRQ1                                         JUMPED
         15-16  unused

        J1802 (single jumper in rightish far edge)
         Jump to enable 16MHz clock                                     JUMPED

        J1803 (single jumper in far left corner)
         Jump to enable VME slot-1 functionality                        JUMPED

        J2202 (single jumper in near right corner)
         Jump to enable 25MHz ESP-236 clock                             JUMPED

        J2602 (3-pin jumper in middle near edge, pin 1 nearest)
         1-2    mouse TD grounded                                       JUMPED
         2-3    mouse TD enabled

        J2603 (single jumper in nearish middle)
         Jump to enable 19MHz SCC clock                                 JUMPED

        J2803 (3-pin jumper in nearish middle, pin 1 nearest)
         1-2    RS-232 (-12V)                                           JUMPED
         2-3    RS-423

        J2804 (3-pin jumper in nearish middle, pin 1 nearest)
         1-2    RS-232 (+12V)                                           JUMPED
         2-3    RS-423

        J3201 (single jumper in middle)
         Jump to enable 80MHz clock                                     JUMPED

        Additional features of interest: the boot PROMs are in the near
        left corner at locations U3001, U3002, U3004, and U3003
        (clockwise from far right). The NVRAM chip is in the middle, at
        location U2701. The serial ports A and B fuses (F2801/F2802) are
        along the near edge by serial port B. The keyboard fuse F2601 is
        by the keyboard connector, the Ethernet fuse F2301 is by the
        Ethernet connector, and the SCSI fuse F2201 is by the SCSI
        connector.

        Note that boot PROM version 2.8v2 or later is required to use
        SM41 modules. Boot PROM version 2.10 or later is required to use
        SM51, SM520, or SM521 modules.

        Power requirements (with 0M and no Mbus modules) are +5V @
        14.27A.

501-1689        4/40 (SPARCstation IPC) motherboard 8M FCC-A
        25MHz MB86901A or LSI L64801. 25MHz SBus.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports B and A from left to right, apparently DB9);
        a 13W3 video connector; an 8-pin-DIN keyboard/mouse connector;
        and an audio connector.

        Connector pinouts and form factors are not known.

        Video output is analog monochrome with the following resolutions
        and sync frequencies: 1152 x 900 @ 61.8KHz horizontal, 66Hz
        vertical; 1152 x 900 @ 71.7HKz horizontal, 76Hz vertical; 1024 x
        800 @ 71.7KHz horizontal, 85Hz vertical; and 1022 x 1000 @
        81.8KHz horizontal, 76Hz vertical.

        Memory is in the form of 1M (501-1697) or 4M (501-1625 or
        501-1739) x 9 30-pin 80ns SIMMs in three banks:

                Nearest disk connectors
                         _______     _______
                        |       |   |       |
                        |   0   |   |   1   |
                        |       |   |       |
                        |_______|   |_______|

                                     _______
                                    |       |
                                    |   2   |
                                    |       |
                                    |_______|

                Nearest SBus connectors

        SIMMs must be identical within banks. If 4M SIMMs are used at
        all, fill bank 0 with them first.

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        J0710 (3-pin jumper by SBus slot 1, pin 1 to left)
         1-2    JUMPED by default
         2-3    Jump to bypass the S4_Video ASIC

        J0960 (3-pin jumper in near middle, pin 1 farthest)
         1-2    Jump for RS423 serial ports
         2-3    Jump for RS232 serial ports

        J0961 (3-pin jumper in near middle, pin 1 farthest)
         1-2    Jump for RS423 serial ports
         2-3    Jump for RS232 serial ports

        J1004 (block along right edge)
         Described only as "SAX". Apparently all pins jumped by default.

        Additional features of interest: the boot PROM is in the middle
        left edge at location U0902. The NVRAM/TOD/ID chip is nearer
        than the boot PROM, at location U0901. At the far edge, from
        left to right, are the power, floppy, speaker, and internal SCSI
        connectors. The Ethernet (F0802) and SCSI (F0801) fuses are in
        the near left corner, P/N 150-1174. (150-1974 and 150-1162
        repsectively may also work?) The keyboard fuse F0901 is by
        serial port B, P/N 150-1174 (150-1162?).

        Note that the IPC was first supported in SunOS 4.0.3c.
        Additionally, CPU boards with the 53C90A SCSI controller require
        a patch to operate under 4.0.3c.

        Note that bug 1047696 in the installation of SunOS 4.1.1 and
        4.1.1 Rev B causes trouble when mixing 1M and 4M SIMMs.
        "Install the 4MB SIMMs in bank 0 when installing miniunix."

        Note that SCSI bus errors may occur when multiple SCSI devices
        are used with boards below 501-1689-06.

        Note that boards below 501-1689-07 fail SunDiag floppy drive
        testing.

        Note that the 2.4, 2.6, and 2.9 boot PROM modes do not support
        SunOS 4.0.3c or 4.1. Set the NVRAM parameter "version2?" to
        FALSE to enable the 1.7 boot PROM mode.

        Power requirements (with a full 48M of 4M SIMMs) are +5V @ 3.7A.

501-1720        4/20 (SPARCstation SLC) motherboard 8M
        See 501-1627.

501-1733        SPARCstation 10 motherboard
        Up to two Mbus modules. 16.6/20MHz (model 20) or 18/20MHz SBus.

        SPARCstation 10 motherboards come in three fab versions,
        270-1733-12 and 270-1733-13 (501-1733/2259/2274), and
        270-1733-14 (501-2365), each with minor layout differences from
        the others. Additionally, the 501-2274 part for the model 20 is
        clocked at a different speed.

        From left to right, the rear edge of the board has: ISDN NT and
        TE connectors; a parallel/audio/AUI Ethernet connector; a
        keyboard connector; a serial port connector (ports A and B in
        the same connector); a 10BaseT Ethernet connector; and a 50-pin
        SCSI-2 connector.

        Connector pinouts and form factors are not known.

        Memory is in the form of up to eight 16M (501-1785 or 501-2273)
        or 64M (501-1930) 70ns SIMMs. They must be installed in the
        order shown:

            Nearest SBus connectors

                J201   ---------------------   (1)
                J202   ---------------------   (8)
                J203   ---------------------   (3)
                J301   ---------------------   (6)
                J302   ---------------------   (4)
                J303   ---------------------   (5)
                J304   ---------------------   (2)
                J305   ---------------------   (7)

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        J0801 (3-pin jumper in near center, pin 1 to left)
         1-2    RS-232 (+12V)
         2-3    RS-423

        J0802 (3-pin jumper in near center, pin 1 to left)
         1-2    RS-232 (-12V)
         2-3    RS-423

        J1101 (single jumper in near left corner)
         Jump to enable 100-ohm ISDN TE termination                     JUMPED

        J1102 (single jumper in near left corner)
         Jump to enable 100-ohm ISDN TE termination                     JUMPED

        J1401
         270-1733-12: (single jumper in near left)
          Jump to select 66MHz (model 20)/72 MHz clock                  JUMPED
         270-1733-13: (3-pin jumper in near left, pin 1 to right)
          1-2   Select 80MHz clock
          2-3   Select 66MHz (model 20)/72MHz clock                     JUMPED

        J1402 (8-pin block in rightish center)
         JTAG test point                                                UNJUMPED

        J1403 (3-pin jumper in near center, pin 1 to left)(270-1733-12 only)
         1-2    Select 66MHz (model 20)/72MHz clock                     JUMPED
         2-3    Select 80MHz clock

        J1404 (3-pin jumper in near center, pin 1 nearest)(270-1733-12 only)
         1-2    Select 66MHz (model 20)/72MHz clock                     JUMPED
         2-3    Select 80MHz clock

        J1601 (single jumper in middle right edge)
         GND test point

        J1602 (single jumper in farish right edge)
         GND test point

        J1603 (single jumper in near right)
         GND test point

        J1604 (single jumper in  middle near edge)
         GND test point

        J1703 (block in rightish near edge)
         1-2    manufacturing jumper - mousei                           UNJUMPED
         3-4    manufacturing jumper - kbdi                             UNJUMPED
         5-6    manufacturing jumper - kbdo                             UNJUMPED
         7-8    manufacturing jumper - edgeon                           UNJUMPED
         9-10   manufacturing jumper - ptxdb                            UNJUMPED
         11-12  manufacturing jumper - prxdb                            UNJUMPED
         13-14  manufacturing jumper - ptxda                            UNJUMPED
         15-16  manufacturing jumper - prxda                            UNJUMPED
         17-18  manufacturing jumper - tpe<0>                           UNJUMPED
         19-20  manufacturing jumper - tpe<1>                           UNJUMPED
         21-22  manufacturing jumper - tpe<2>                           UNJUMPED
         23-24  manufacturing jumper - tpe<3>                           UNJUMPED

        Additional features of interest: the boot PROM is in the near
        right at location U1005. The NVRAM/TOD/ID chip is beyond the
        boot PROM, at location U1004. The power connector is in the far
        left corner and the floppy and internal SCSI connector is in the
        far right corner. The speaker fuse F1302, Ethernet fuse F1301,
        and keyboard fuse F0801 are in a row along the middle near edge.
        The SCSI fuse F1502 is in the far right corner near the SCSI
        connector. The +12V fuse F1501 is in the middle left edge. All
        fuses are nonreplaceable PTC devices. In the nearish left is a
        large square chip, the MSI. For 270-1733-12 and -13, it may be
        either 100-2905-02 (L1A6396) or 100-2905-03 (L1B7596). For
        270-1733-14, it is always 100-2905-03 (L1B7596).

        Note that the 270-1733-14 fab has BABT approval for ISDN and
        X.25 use in the UK.

        Note that boot PROM version 2.12 is required to install two
        501-2358 SM40 Mbus modules.

        Note that when adding a second Mbus module, any internal disk
        drives with PTC protection should have the TERMPWR option
        disabled. Otherwise, the power supply overcurrent protection may
        be tripped when powering up.

        Note that the GT and ZX options are not supported on boards with
        MSI 100-2905-02 (LSI Logic L1A6396). They are only supported on
        board with MSI 100-2905-03 (LSI Logic L1B7596).

        When installing internal SCSI disk drives, disable the TERMPWR
        option. SCSI bus TERMPWR is grounded on internal cable
        530-1874-02. If TERMPWR is not disabled on drives with PTC
        protection, the power supply overcurrent protection may be
        tripped when powering up. If TERMPWR is not disabled on drives
        with fuse protection, the fuses will blow. TERMPWR on the
        internal SCSI bus is not connected to TERMPWR on the external
        SCSI bus. Additionally, the inner surface of the SS10 chassis is
        conductive, so drives must be mounted with insulating hardware.

501-1742        4/3xx CPU VME 32M
        See 501-1316.

501-1744        4/75 (SPARCstation 2) motherboard 0M FCC-A
        See 501-1638.

501-1748        4/20 (SPARCstation SLC) motherboard 0M
        See 501-1627.

501-1780        4/50 (SPARCstation IPX) motherboard 16M
        40MHz Fujitsu MB86903 or Weitek W8701, Sun-4c MMU with 8
        hardware contexts. 20MHz SBus.

        From left to right, the rear edge of the board has: a 50-pin
        SCSI-2 connector; an Ethernet connector; two serial port
        connectors (ports B and A from left to right, apparently DB9);
        a 13W3 video connector; an 8-pin-DIN keyboard/mouse connector;
        and an audio connector.

        Connector pinouts and form factors are not known.

        Video output is analog 8-bit color with the following
        resolutions and sync frequencies: 1152 x 900 @ 61.8KHz
        horizontal, 66Hz vertical; 1152 x 900 @ 71.7HKz horizontal, 76Hz
        vertical; 1024 x 800 @ 71.7KHz horizontal, 85Hz vertical; and
        1022 x 1000 @ 81.8KHz horizontal, 76Hz vertical.

        Memory consists of up to four 4M or 16M x 33 72-pin SIMMs
        (501-1812 (4M), and 501-1822 or 501-1915 (16M)). SIMM types may
        be mixed, and should be installed according to this table:

             total RAM         U0310   U0309   U0308   U0307
             ---------         -----   -----   -----   -----
                8M              4M              4M
                12M             4M      4M      4M
                16M             4M      4M      4M      4M
                 or             16M
                20M             16M             4M
                24M             16M     4M              4M
                28M             16M     4M      4M      4M
                32M             16M             16M
                36M             16M     16M     4M
                40M             16M     16M     4M      4M
                48M             16M     16M     16M
                52M             16M     16M     16M     4M
                64M             16M     16M     16M     16M

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        J0502 (3-pin jumper in near left, pin 1 farthest)
         1-2    Jump for RS423 serial ports
         2-3    Jump for RS232 serial ports

        J0503 (3-pin jumper in near left, pin 1 farthest)
         1-2    Jump for RS423 serial ports
         2-3    Jump for RS232 serial ports

        J0705 (block in near left)
         Described only as "SAX". Apparently all pins jumped by default.

        Additional features of interest: the boot PROM is along the
        middle left edge at location U0501. The NVRAM/TOD/ID chip is
        beyond the boot PROM at location U0512. At the far edge, from
        left to right, are the power, floppy, speaker, and internal SCSI
        connectors. In the far left corner are the keyboard (F0602) and
        Ethernet (F0404) fuses, and the SCSI fuse (F0403) is in the
        middle far edge. The fuses are not field-replaceable.

        Note that the IPX was first supported in SunOS 4.1.1.
        Additionally, CPU boards with the 100-2770-02 LSC L1A6341 ASIC
        are subject to bugs 1055265, 1057110, and 1057243 under SunOS
        4.1.1 and 4.1.1 Rev B. The IPX supplement fixes these bugs, and
        was rolled into SunOS 4.1.2.

        Note that bug 1047696 in the installation of SunOS 4.1.1 and
        4.1.1 Rev B causes trouble when mixing 4M and 16M SIMMs.
        "Install the 16MB SIMM in U0310 when installing miniunix."

        Power requirements are +5V @ 4.4A with 64M, and +5V @ 3.8A with
        16M (of 4M SIMMs); and +12V @ 0.4A.

501-1810        4/50 (SPARCstation IPX) motherboard 0M
        See 501-1780.

501-1835        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        See 501-1689.

501-1858        4/75 (SPARCstation 2) motherboard 16M FCC-B
        See 501-1638.

501-1859        4/75 (SPARCstation 2) motherboard 0M FCC-B
        See 501-1638.

501-1861        4/25 (SPARCstation ELC) motherboard
        33MHz Fujitsu MB86903 or Weitek W8701, Sun-4c MMU with 8
        hardware contexts.

        This board is an unusual shape because it is intended to slip
        into the vertical slot in the monitor case behind the tube. It
        slides in from the top, I believe with the component side facing
        toward the front of the machine (all left/right orientations
        below assume you are looking down on the board from the rear of
        the machine). On the bottom edge is an edge connector which
        supplies power and connects the CPU to the external signal
        connectors.

        There are no jumpers.

        Memory consists of up to four 4M or 16M x 33 72-pin SIMMs
        (501-1812 or 501-1698 (4M), and 501-1822 (16M)). SIMM types may
        be mixed, and should be installed according to this table:

             total RAM         U0407   U0408   U0409   U0410
             ---------         -----   -----   -----   -----
                8M              4M              4M
                12M             4M      4M      4M
                16M             4M      4M      4M      4M
                 or             16M
                20M             16M             4M
                24M             16M     4M              4M
                28M             16M     4M      4M      4M
                32M             16M             16M
                36M             16M     16M     4M
                40M             16M     16M     4M      4M
                48M             16M     16M     16M
                52M             16M     16M     16M     4M
                64M             16M     16M     16M     16M

        Additional features of interest: the boot PROM is a PLCC toward
        the upper right corner, at location U0806. The NVRAM is to the
        right of the boot PROM at location U0813. Ethernet fuse F0901
        and SCSI fuse F0701 are toward the right bottom, near the edge
        connector, and are both non-replaceable PTC devices.

        Note that the ELC was first supported in SunOS 4.1.1c.
        Additionally, bug 1047696 in the installation of SunOS 4.1.1 and
        4.1.1 Rev B causes trouble when mixing 4M and 16M SIMMs.
        "Install the 16MB SIMM in U0407 when installing miniunix."

501-1866        SPARCcenter 2000 motherboard XDBus 0M
        Twin XDBuses. Up to two Mbus modules. 20MHz SBus.

        With component side up, external connector edge toward you, from
        left to right, the rear edge of the board has: nine LEDs (PA,
        PB, and bits 7-0 from left to right); a serial port connector
        (port A); a keyboard/mouse connector; and a serial port
        connector (port B).

        Memory is in the form of up to sixteen 8M (501-1817) or 32M
        (501-2196) 70ns SIMMs, in interleaved groups of eight, with half
        of each group attached to each XDBus. The minimum memory
        configuration is eight SIMMs in group 0.

                Back of machine (nearest SBus connectors)

                     -------U4800------ 0  XDBus: 1
                     -------U4400------ 1         1
                     -------U5000------ 0         1
                     -------U4600------ 1         1
                     -------U4900------ 0         1
                     -------U4500------ 1         1
                     -------U5100------ 0         1
                     -------U4700------ 1         1
                     -------U4000------ 0         0
                     -------U3600------ 1         0
                     -------U4200------ 0         0
                     -------U3800------ 1         0
                     -------U4100------ 0         0
                     -------U3700------ 1         0
                     -------U4300------ 0         0
                     -------U3900------ 1         0

                Front of machine (nearest XDBus connector)

        There are three jumpers.

        J1400 (3-pin jumper in near left, pin 1 nearest)
         1-2    RS-423
         2-3    RS-232 (+12V)

        J1401 (3-pin jumper in near left, pin 1 nearest)
         1-2    RS-423
         2-3    RS-232 (-12V)

        J1501 (3-pin jumper in center near edge, pin 1 to right)
         2-3    JUMPED always.

        Additional features of interest: the boot PROM is four chips
        along the near left edge, at locations U1206, U1204, U1201, and
        U1200 (farthest to nearest). The NVRAM chip is to the right of
        the boot PROM, at location U1205. The keyboard fuse (a PTC
        device) is by the keyboard/mouse connector at F1500.

        Note that guide pins were added to the SPARCcenter 2000
        backplane starting in November 1993. Remove the screws on the
        inside ends of the motherboard XDBus connectors before
        installing it in a backplane with guide pins.

        Note that the highest-revision boot PROM should be installed in
        system board 0.

        Note that the 501-1866 can only access 1M of cache; the 501-2334
        and 501-2362 do not have this limitation.

        Note that FAB 270-1866-03 uses fuses at F0200 and F0300; FAB
        270-1866-04 uses PTCs.

        Note that the SPARCcenter 1000 was first supported by Solaris
        2.2 (SunOS 5.2). Solaris 2.2 supports up to five system boards,
        or eight Mbus modules on four system boards. Solaris 2.3
        supports up to twenty Mbus modules on ten system boards.

501-1870        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        See 501-1689.

501-1899        4/4xx CPU VME
        See 501-1381.

501-1912        4/75 (SPARCstation 2) motherboard 32M FCC-B
        See 501-1638.

501-1926        4/75 (SPARCstation 2) motherboard 32M FCC-B
        See 501-1638 (minor layout differences).

501-1959        4/50 (SPARCstation IPX) motherboard 16M
        See 501-1780.

501-1974        4/40 (SPARCstation IPC) motherboard 8M FCC-B
        See 501-1689.

501-1989        4/75 (SPARCstation 2) motherboard 16M FCC-B
        See 501-1638 (minor layout differences).

501-1995        4/75 (SPARCstation 2) motherboard 0M FCC-B
        See 501-1638 (minor layout differences).

501-2031        4/30 (SPARCstation LX/ZX) motherboard 32M
        50 MHz microSPARC. 20MHz SBus.

        This board is an unusual shape. On one edge are edge connectors.
        All directions below are given assuming the component side up
        and the edge connectors toward you.

        There are two jumpers.

        J1801 (3-pin jumper in near right corner)
         1-2    100-ohm ISDN TE termination enabled                     JUMPED
         2-3    disabled

        J1802 (3-pin jumper in near right corner)
         1-2    100-ohm ISDN TE termination enabled                     JUMPED
         2-3    disabled

        The onboard video produces analog color output at the following
        resolution and sync frequencies: 1152 x 900 @ 61.8KHz
        horizontal, 66Hz vertical; 1152 x 900 @ 71.7KHz horizontal, 76Hz
        vertical; 1024 x 768 @ 61.8KHz horizontal, 77Hz vertical; and
        1600 x 1280 @ 71.7KHz horizontal, 76Hz vertical. Onboard VRAM is
        1M; a 501-2061 1M VSIMM may be installed in U1301 (on right) to
        achieve 2M VRAM.

        Memory consists of up to six SIMMs, in three pairs of 4M
        (501-1991) or 16M (501-2059) SIMMs. SIMM types may be mixed, and
        should be installed according to this table:

                       bank1   bank2   bank3   bank1   bank2   bank3
          total RAM    U0304   U0301   U0402   U0303   U0302   U0401
          ---------    -----   -----   -----   -----   -----   -----
             16M        4M      4M              4M      4M
             24M        4M      4M      4M      4M      4M      4M
             32M        16M                     16M
             40M     *  4M      16M             4M      16M
             48M     *  4M      4M      16M     4M      4M      16M
              or        16M     4M      4M      16M     4M      4M
             64M        16M     16M             16M     16M
             72M     *  4M      16M     16M     4M      16M     16M
             96M        16M     16M     16M     16M     16M     16M

        Rows marked with '*' do not work under SunOS 4.1.3c. "Put 16MB
        SIMMs in Bank 1."

        Additional features of interest: the boot PROM is a PLCC in the
        near left corner, at location U0701. The NVRAM is beyond the
        boot PROM at location U0707. Ethernet fuse F2001 and SCSI
        TERMPWR fuse F0601 are in the near left corner. Keyboard fuse
        F2001 and audio fuse F2003 are in the middle near edge. Along
        the far edge, more or less from left to right, are the
        speaker/LED, power, floppy, and internal SCSI connectors.

        Note that the SPARCstation LX/ZX was first supported in SunOS
        4.1.3c.

        Note that when the 501-2061 VSIMM is installed, (one of?) the
        following commands should be issued at the ROM monitor prompt:

            setenv output-device screen:r1280x1024x67
            setenv output-device screen:r1280x1024x76
            setenv output-device screen:r1600x1280x76

        Note that when the '16" Mid-Range Color Monitor' is installed,
        (one of?) the following commands should be issued at the ROM
        monitor prompt:

            setenv output-device screen:r1152x900x66
            setenv output-device screen:r1024x768x77

501-2032        4/30 (SPARCstation LX/ZX) motherboard 16M
        See 501-2031.

501-2044        4/50 (SPARCstation IPX) motherboard 0M
        See 501-1780.

501-2055        4/6xx motherboard VME 0M
        See 501-1686.

501-2079        4/10 (SPARCclassic X) motherboard 4M
        See 501-2262.

501-2200        4/15 (SPARCclassic) motherboard 16M
        See 501-2262.

501-2233        4/30 (SPARCstation LX/ZX) motherboard 0M
        See 501-2031.

501-2259        SPARCstation 10 motherboard
        See 501-1733. Fabs 270-1733-12 and -13.

501-2262        4/10/15 (SPARCclassic X/SPARCclassic) motherboard 0M
        50 MHz microSPARC. 20MHz SBus.

        This board is an unusual shape. On one edge are edge connectors.
        All directions below are given assuming the component side up
        and the edge connectors toward you.

        There are no jumpers.

        The onboard video produces analog color output at the following
        resolution and sync frequencies: 1152 x 900 @ 61.8KHz
        horizontal, 66Hz vertical; 1152 x 900 @ 71.7KHz horizontal, 76Hz
        vertical; and 1024 x 768 @ 61.8KHz horizontal, 77Hz vertical.

        Memory consists of up to six SIMMs, in three pairs. 1M
        (501-2289), 2M (501-2433), 4M (501-1991), and 16M (501-2059)
        60ns SIMMs are documented for SPARCclassic X models; only 4M and
        16M SIMMs are documented for the SPARCclassic proper. SIMM types
        may be mixed, and should be installed according to this table:

                       bank1   bank2   bank3   bank1   bank2   bank3
          total RAM    U0304   U0301   U0402   U0303   U0302   U0401
          ---------    -----   -----   -----   -----   -----   -----
             8M     X   1M      1M      2M      1M      1M      2M
              or    X   2M      2M              2M      2M
              or    X   4M                      4M
             12M    X   1M      1M      4M      1M      1M      4M
              or    X   2M      4M              2M      4M
              or    X   2M      2M      2M      2M      2M      2M
             16M        4M      4M              4M      4M
              or    X   2M      2M      4M      2M      2M      4M
             20M    X   2M      4M      4M      2M      4M      4M
             24M        4M      4M      4M      4M      4M      4M
             32M        16M                     16M
             36M    X   1M      1M      16M     1M      1M      16M
              or    X   2M      16M             2M      16M
             40M    X   2M      2M      16M     2M      2M      16M
              or     *  4M      16M             4M      16M
             44M    X   2M      4M      16M     2M      4M      16M
             48M     *  4M      4M      16M     4M      4M      16M
              or    C   16M     4M      4M      16M     4M      4M
             64M        16M     16M             16M     16M
             72M     *  4M      16M     16M     4M      16M     16M
             96M        16M     16M     16M     16M     16M     16M

        Rows marked with 'X' are documented for the SPARCclassic X only.
        Rows marked with 'C' are documented for the SPARCclassic proper
        only. Rows marked with '*' do not work under SunOS 4.1.3c. "Put
        16MB SIMMs in Bank 1."

        Additional features of interest: the boot PROM is a PLCC toward
        the middle left edge, at location U0701. The NVRAM is to the
        left of the boot PROM at location U0707. Ethernet fuse F1703 and
        keyboard fuse F1701 are in the near left corner. The SCSI
        TERMPWR fuse F0601 is toward the near right corner. All fuses
        are non-replaceable PTC devices. Along the far edge, from left
        to right, are the power, speaker/LED, floppy, and internal SCSI
        connectors.

        Note that the SPARCclassic/SPARCclassic X was first supported in
        SunOS 4.1.3c.

501-2274        SPARCstation 10 motherboard (model 20 only)
        See 501-1733. Fabs 270-1733-12 and -13.

501-2313        4/10 (SPARCclassic X) motherboard 8M
        See 501-2262.

501-2326        4/15 (SPARCclassic) motherboard 32M
        See 501-2262.

501-2334        SPARCcenter 2000 motherboard XDBus 0M
        See 501-1866.

501-2336        SPARCserver 1000 motherboard XDBus 0M
        Up to two Mbus modules. 20MHz SBus.

        With component side up, external connector edge toward you, from
        left to right, the rear edge of the board has: nine LEDs (PA,
        PB, and bits 7-0 from left to right); a serial port connector
        (port A); a keyboard/mouse connector; a serial port connector
        (port B); a 50-pin SCSI-2 connector; and a 10baseT Ethernet
        connector.

        Memory is in the form of up to sixteen 8M (501-1817) or 32M
        (501-2196) 70ns SIMMs, in staggered groups of four. The minimum
        memory configuration is four SIMMs in group 0.

                Back of machine (nearest SBus connectors)

                -------J2800------ 0   0 -------J3000--------
                -------J3200------ 1   1 -------J3400--------
                -------J3600------ 2   2 -------J3800--------
                -------J4000------ 3   3 -------J4200--------
                -------J2900------ 0   0 -------J3100--------
                -------J3300------ 1   1 -------J3500--------
                -------J3700------ 2   2 -------J3900--------
                -------J4100------ 3   3 -------J4300--------

                Front of machine (nearest XDBus connector)

        There are two jumpers.

        J1200 (3-pin jumper in near middle, pin 1 to left)
         1-2    RS-423
         2-3    RS-232 (+12V)

        J1201 (3-pin jumper in near middle, pin 1 to left)
         1-2    RS-423
         2-3    RS-232 (-12V)

        Additional features of interest: the boot PROM is four chips in
        the near left corner, at locations U1000-U1004 (from right to
        left). The TOD chip is just to the right of the boot PROM, at
        location U1007.

        Note that guide pins were added to the SPARCserver 1000
        backplane starting in December 1993. Remove the screws on either
        end of the motherboard XDBus connector before installing it in a
        backplane with guide pins.

        Note that the highest-revision boot PROM should be installed in
        system board 0.

        Note that the SPARCserver 1000 was first supported by Solaris
        2.2 (SunOS 5.2).

501-2362        SPARCcenter 2000 motherbard XDBus 0M
        See 501-1866.

501-2365        SPARCstation 10 motherboard
        See 501-1733. Fab 270-1733-14.

501-2377        SPARCstation 10SX/BSX motherboard 0M
        Up to two Mbus modules. 18/20MHz SBus.

        From left to right, the rear edge of the board has: headphone,
        microphone, audio in, and audio out connectors; a parallel/AUI
        Ethernet connector; a keyboard connector; a serial port
        connector (ports A and B in the same connector); a 10BaseT
        Ethernet connector; a 50-pin SCSI-2 connector; and a 13W3 video
        connector.

        Connector pinouts and form factors are not known.

        Memory is in the form of up to eight 16M (501-1785 or 501-2273)
        or 64M (501-1930) 70ns SIMMs. They must be installed in the
        order shown:

            Nearest SBus connectors

                J201   ---------------------   (1)
                J202   ---------------------   (8)
                J203   ---------------------   (3)
                J301   ---------------------   (6)
                J302   ---------------------   (4)
                J303   ---------------------   (5)
                J304   ---------------------   (2)
                J305   ---------------------   (7)

        There are a variety of jumpers. All locations are given with
        component side up and connector side toward you.

        A single 4M (501-2306) or 8M (501-2342) VSIMM may be installed
        (at J0405?).

        J0801 (3-pin jumper in near center, pin 1 to left)
         1-2    RS-232 (+12V)
         2-3    RS-423

        J0802 (3-pin jumper in near center, pin 1 to left)
         1-2    RS-232 (-12V)
         2-3    RS-423

        J1402 (8-pin block in rightish center)
         JTAG test point                                                UNJUMPED

        J1601 (single jumper in middle right edge)
         GND test point

        J1602 (single jumper in farish right edge)
         GND test point

        Additional features of interest: the boot PROM is in the near
        right at location U1005. The NVRAM/TOD/ID chip is beyond the
        boot PROM, at location U1004. The power connector is in the far
        left corner and the floppy and internal SCSI connector is in the
        far right corner. The Ethernet fuse F1301, and keyboard fuse
        F0801 are along the middle near edge. The SCSI fuse F1502 is in
        the far right corner near the SCSI connector. The +12V fuse
        F1501 is in the middle left edge. All fuses are nonreplaceable
        PTC devices. Audio daughterboard 501-2395 is always installed in
        the near left corner.

        Note that audio sampling at 37.8KHz is not supported.

        Note that when adding a second Mbus module, any internal disk
        drives with PTC protection should have the TERMPWR option
        disabled. Otherwise, the power supply overcurrent protection may
        be tripped when powering up.

        Note that the GT and ZX options are not supported on boards with
        MSI 100-2905-02 (LSI Logic L1A6396). They are only supported on
        board with MSI 100-2905-03 (LSI Logic L1B7596).

        When installing internal SCSI disk drives, disable the TERMPWR
        option. SCSI bus TERMPWR is grounded on internal cable
        530-1874-02. If TERMPWR is not disabled on drives with PTC
        protection, the power supply overcurrent protection may be
        tripped when powering up. If TERMPWR is not disabled on drives
        with fuse protection, the fuses will blow. TERMPWR on the
        internal SCSI bus is not connected to TERMPWR on the external
        SCSI bus. Additionally, the inner surface of the chassis is
        conductive, so drives must be mounted with insulating hardware.

        Note that the SPARCstation 10SX/10BSX was first supported by
        Solaris 2.3.

501-2474        4/30 (SPARCstation LX/ZX) motherboard 0M
        See 501-2031.

501-2495        4/75 (SPARCstation 2) motherboard 0M (270-1926) w/SPARC POWER uP
        Same as 501-1926, but with SPARC POWER uP processor upgrade.

501-2496        4/50 (SPARCstation IPX) motherboard 0M (270-1780) w/SPARC POWER uP
        Same as 501-1780, but with SPARC POWER uP processor upgrade.

501-2505        4/75 (SPARCstation 2) motherboard 0M (270-1638) w/SPARC POWER uP
        Same as 501-1638, but with SPARC POWER uP processor upgrade.

501-2506        4/75 (SPARCstation 2) motherboard 0M (270-1858) w/SPARC POWER uP
        Same as 501-1858, but with SPARC POWER uP processor upgrade.

501-2507        4/50 (SPARCstation IPX) motherboard 0M (270-1959) w/SPARC POWER uP
        Same as 501-1959, but with SPARC POWER uP processor upgrade

501-8028        3/E CPU 6U VME
        68020, 68881, Sun-3 MMU with eight hardware contexts. VME bus
        interface, 6U form factor.

        From left to right with component side up and connector side
        nearest you (normal top edge at left), the rear edge of the
        board has: eight LEDs (bit 0 to the right/bottom), a keyboard
        connector, two serial port connectors (B and A from left to
        right (top/bottom)), a switch to toggle between Diagnostic and
        Normal modes, and a reset switch.

        Connector pinouts and form factors are unknown, but are probably
        similar to other Sun-3 systems.

        There are a variety of jumper blocks. All locations are given
        with component side up and connector side toward you.

        J100 (single jumper between VME connectors, to right)
          Unused.

        J300 (block in center between VME connectors, pin 1 to left)
          1-2   Enable VME interrupt level 1                    JUMPED
          3-4   Enable VME interrupt level 2                    JUMPED
          5-6   Enable VME interrupt level 3                    JUMPED
          7-8   Enable VME interrupt level 4                    JUMPED
          9-10  Enable VME interrupt level 5                    JUMPED
          11-12 Enable VME interrupt level 6                    JUMPED
          13-14 Enable VME interrupt level 7                    JUMPED

        J500 (three-pin jumper between VME connectors, to left)
          1-2   CPU can reset other VME boards                  JUMPED
          2-3   Other VME boards can reset CPU                  UNJUMPED

        J501 (three-pin jumper between VME connectors, to left)
          1-2   CPU is the daisy chain driver                   JUMPED
          2-3   CPU is not the daisy chain driver               UNJUMPED

        J800 (block near serial port B, pin 1 nearest)
          1-2   unused
          3-4   VME arbiter                                     JUMPED
          5-6   enable video board interrupt                    JUMPED
          7-8   respond as VME slave                            JUMPED

        J801 *single jumper between VME connectors, to right)
          Jump to enable VME system clock.                      JUMPED

        Additional features of interest: the boot PROM is along the left
        edge, at location U300, by the battery. The IDPROM is in the
        near center, near J800 and the keyboard connector. There is a
        fuse by the keyboard connector and LEDs, documented as not field
        replacable.

        Power requirements are +5V @ 8.1A, +12V @ 0.25A, and -12V @
        0.12A.

501-8035        4/E (SPARCengine 1) CPU VME 4M w/Weitek
501-8058        4/E (SPARCengine 1) CPU VME 4M w/o Weitek
501-8064        4/E (SPARCengine 1) CPU VME 16M w/Weitek
        VME bus interface, 6U form factor. One SBus slot.

        From left to right with component side up and connector side
        nearest you (normal top edge at left), the rear edge of the
        board has: a 50-pin SCSI-2 connector; an Ethernet connector; a
        keyboard/mouse connector; a serial port connector (port B,
        apparently DB9); eight LEDs (bit 0 to the left/top); a reset
        switch; and another serial port connector (port A, apparently
        DB9).

        Connector pinouts and form factors are unknown.

        There are a variety of jumper blocks. All locations are given
        with component side up and connector side toward you.

        J0301 (single jumper in middle)
         Jump to enable 20MHz clock.                            JUMPED

        J0801 (3-pin jumper in far middle)
         1-2    Use 4M parity memory                            JUMPED
         2-3    Disable 4M parity memory

        J1701 (single jumper in middle far edge)
         Jump if CPU is installed in VME slot 1.                JUMPED

        Additional features of interest: the boot PROM is on a
        daughtercard in the near left. The keyboard fuse F1101 and
        Ethernet fuse F0901 are near the keyboard connector and are not
        field replaceable. The SBus connector is along the far edge, by
        one of the VME connectors.

        Note that boot PROM version 1.4 does not support SunOS 4.1e, but
        versions 1.5 and 1.6 do.

        Note that boot PROM version 1.6 and daughtercard 500-8013-05 are
        installed on CPU 501-8035-12. This daughtercard is required if a
        customer-supplied PROM is used with the 1.6 boot PROM;
        customer-supplied PROMs will not function on daughter cards
        500-8013-04 or below, even if 1.6 boot PROMs are installed.

        Power requirements are +5V @ 5A, +12V @ 0.1A, and -12V @
        0.1A.


    SPARC modules
    -------------

370-1388        SM100 SPARC module Mbus
        Dual ROSS CPUs, 40MHz. For use in 4/6xx. "Option 1160".

        Install the first SM100 in the first Mbus slot.

        Solaris 2.1 (SunOS 5.1 requires 370-1388-08 or later.

        Power requirements are +5V @ 2.5A.

501-1889        SM30 SPARC module Mbus
        33MHz SuperSPARC. For use in SPARCstation 10, model 20 only
        (requires the 66MHz clock speed only available on the model 20).

        SunOS 4.1.3 is required.

        The SPARCstation 10 270-1733-08, -09, and -10 FABs require a
        crystal change to support this module.

        Power requirements are +5V @ 1.04A.

501-2218        SM20 SPARC module Mbus
        33MHz SuperSPARC. For use in SPARCstation 10, model 20 only
        (requires the 66MHz clock speed only available on the model 20).

        SunOS 4.1.3 is required.

        The SPARCstation 10 270-1733-08, -09, and -10 FABs require a
        crystal change to support this module.

        At location F0401 is a 5A fuse, P/N 150-2085.

        Power requirements are +5V @ 2.55A.

501-2219        SM40 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20).

        SunOS 4.1.3 is required. Only one of these modules is supported
        in a system.

        The SPARCstation 10 clock should be set to 80MHz.

        At location F0401 is a 5A fuse, P/N 150-2085.

        Power requirements are +5V @ 2.86A.

501-2239        SM30 SPARC module Mbus
        36MHz SuperSPARC. For use in SPARCstation 10 (but not model 20).

        SunOS 4.1.3 is required.

        The SPARCstation 10 clock should be set to 72MHz.

        The SPARCstation 10 270-1733-08, -09, and -10 FABs require a
        crystal change to support this module.

        At location F0401 is a 5A fuse, P/N 150-2085.

        Power requirements are +5V @ 2.62A.

501-2258        SM41 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx. "Option 1161".

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

        Power requirements are +5V @ 4.28A.

501-2270        SM41 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx. The 501-2270-04 and later are also supported in the
        SPARCserver 1000 and SPARCcenter 2000. "Option 1161".

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

        Power requirements are +5V @ 4.28A.

501-2318        SM41 SPARC module Mbus
        33MHz SuperSPARC. For use in SPARCcenter 2000; used in early
        production systems only.

        The 66MHz control board 501-1671-04 is required; this module is
        not compatible with system control boards 501-1671-05, 501-2335,
        or 501-2406.

        Surface mounted fuse F0801 is not field-replaceable.

501-2352        SM51 SPARC module Mbus
        50MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx. "Option 1163".

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed. The 4/6xx also requires boot
        ROM version 2.10 or later.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

501-2351        SM51-2 SPARC module Mbus
        50MHz SuperSPARC. For use in SPARCcenter 2000.

        Solaris 2.2 (SunOS 5.2) is required. The SPARCcenter 2000
        requires boot ROM version 2.11 or later.

        Surface mounted fuse F0801 is not field-replaceable.

501-2358        SM40 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20).

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) and boot PROM
        version 2.12 or later is required if two of these modules are
        installed.

        The SPARCstation 10 clock should be set to 80MHz.

        At location F0401 is a 5A fuse, P/N 150-2085.

        Power requirements are +5V @ 2.86A.

501-2359        SM41 SPARC module Mbus
        40MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx, SPARCcenter 2000. "Option 1161".

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

        Power requirements are +5V @ 4.28A.

501-2360        SM51 SPARC module Mbus
        50MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx, SPARCserver 1000. "Option 1166".

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed. The 4/6xx also requires boot
        ROM version 2.10 or later; the SPARCserver 1000 requires boot
        ROM version 2.11 or later.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

501-2361        SM51 SPARC module Mbus
        50MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx. The 501-2361-01 is for Sun internal use only and is only
        tested for operation at room temperature.

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed. The 4/6xx also requires boot
        ROM version 2.10 or later.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

501-2387        SM51 SPARC module Mbus
        50MHz SuperSPARC. For use in SPARCstation 10 (but not model 20),
        4/6xx, SPARCserver 1000. The 501-2387-01 is for Sun internal use
        only and is only tested for operation at room temperature.

        SunOS 4.1.3 is required. Solaris 2.2 (SunOS 5.2) is required if
        two of these modules are installed. The 4/6xx also requires boot
        ROM version 2.10 or later; the SPARCserver 1000 requires boot
        ROM version 2.11 or later.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuse F0801 is not field-replaceable.

501-2431        SM52X dual SPARC module Mbus
        50MHz dual SuperSPARC. For use in SPARCstation 10 (but not model
        20).

        Solaris 2.3, with the Solaris 2.3 Supplement CD (704-4195-10),
        is required.

        The SPARCstation 10 clock should be set to 80MHz.

        Surface mounted fuses F1301 and F1401 are not field-replaceable.

        This module covers SBus slots 0 and 1.

501-2444        SM520 dual SPARC module Mbus
        50MHz dual SuperSPARC. For use as first dual processor in 4/6xx.

        Solaris 2.3, with the Solaris 2.3 Supplement CD (704-4195-10),
        is required. The 4/6xx also requires boot ROM version 2.10 or
        later.

        Install this module in the first Mbus slot.

501-2445        SM521 dual SPARC module Mbus
        50MHz dual SuperSPARC. For use as second dual processor in 4/6xx.

        Solaris 2.3, with the Solaris 2.3 Supplement CD (704-4195-10),
        is required. The 4/6xx also requires boot ROM version 2.10 or
        later.

        Install this module in the second Mbus slot. It covers Sbus
        slots 2 and 3.

             END OF PART III OF THE SUN HARDWARE REFERENCE



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