DIGITAL EQUIPMENT CORPORATION

STARION 400, 500

Device Type                Mainboard
Processor                  Pentium
Processor Speed            60/66MHz
Chip Set                   Unidentified
Video Chip Set             C & T
Maximum Onboard Memory     128MB
Maximum Video Memory       2MB
Cache                      256/512KB
BIOS                       Unidentified
Dimensions                 254mm x 218mm
I/O Options                Floppy drive interface, IDE interface, parallel
                           port, PS/2 mouse port, serial ports (2), VGA
                           port, riser slot
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                  Location

  VGA port                 CN1        PS/2 mouse port            CN5

  Parallel port            CN2        Floppy drive               CN6
                                      interface

  Serial port              CN3        IDE interface              CN7

  Serial port              CN4        Riser slot                 SL1

  Note: VGA & serial ports are shown for informational purposes only. The
  location may not be exact.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not           C1           Unidentified
      alter

  »   Factory configured - do not           C2           Unidentified
      alter

  »   Factory configured - do not           C3           Unidentified
      alter

  »   CMOS memory normal operation          JP2        Pins 1 & 2 closed

      CMOS memory clear                     JP2        Pins 2 & 3 closed

  »   Monitor type select color             JP6        Pins 1 & 2 closed

      Monitor type select monochrome        JP6        Pins 2 & 3 closed

  »   ISA to IDE IRQ select IRQ14           JP9        Pins 1 & 2 closed

      ISA to IDE IRQ select IRQ15           JP9        Pins 2 & 3 closed

  »   On board video enabled               JP13        Pins 1 & 2 closed

      On board video disabled              JP13        Pins 2 & 3 closed

  »   Factory configured - do not           S1           Unidentified
      alter

  »   Factory configured - do not           S2           Unidentified
      alter

                SIMM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 512K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

      12MB        (2) 512K x 36     (2) 1M x 36

            SIMM CONFIGURATION (CON’T)

      Size            Bank 0           Bank 1

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      18MB        (2) 256K x 36     (2) 2M x 36

      20MB        (2) 512K x 36     (2) 2M x 36

      24MB         (2) 1M x 36      (2) 2M x 36

      32MB         (2) 4M x 36          None

      32MB         (2) 2M x 36      (2) 2M x 36

      34MB        (2) 256K x 36     (2) 4M x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      66MB        (2) 256K x 36     (2) 8M x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 4M x 36      (2) 8M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

                            CACHE CONFIGURATION

            Note: The location of the cache is unidentified. The Starion
            400 is upgradable to 256KB of cache and the Starion 500 is
            upgradable to 512KB of cache.

                  VIDEO MEMORY CONFIGURATION

        Size               Bank 0               Bank 1

        1MB                  1MB                 None

        2MB                  1MB                 1MB

  Note: The size of the video memory chips is unidentified.

                            CPU SPEED SELECTION

      Speed             JP10               JP11               JP12

      60MHz           Pins 2 & 3        Pins 2 & 3      Pins 2 & 3 closed
                       closed             closed

      66MHz           Pins 1 & 2        Pins 1 & 2      Pins 1 & 2 closed
                       closed             closed

                     SERIAL PORT 1 INTERRUPT SELECTION

                 IRQ                                  JP3

  »                 4                          Pins 1 & 2 closed

                    10                         Pins 3 & 4 closed

                     SERIAL PORT 2 INTERRUPT SELECTION

                 IRQ                                  JP3

  »                 3                          Pins 5 & 6 closed

                    11                         Pins 7 & 8 closed

                     PARALLEL PORT INTERRUPT SELECTION

                 IRQ                                  JP3

  »                 7                         Pins 9 & 10 closed

                    5                         Pins 11 & 12 closed