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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. There is a terminator resistor
  pack at U1411.

 Note that if memory boards are installed on both sides of the CPU, the
  terminator pack at U1411 should be removed.

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

 Note that this board can use P4 cgeight framebuffer 501-1371-04 or later only.

 Note that jumpers P10, P11, P12, and P13 should be removed from the 501-1598
  and 501-1832 backplanes when this CPU is installed.

 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.


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