• Specifications

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.

  

   Last modified: 2000.10.28.11.30.28 CDT
     Server time: 2008.05.17.23.42.51 GMT