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• Specifications

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.

  

   Last modified: 2000.12.07.21.41.28 CST
     Server time: 2008.12.06.05.28.30 GMT