
UNIDENTIFIED

640K SYSTEM BOARD

Processor         8088
Processor Speed   10MHz
Chip Set          Unidentified
Max. Onboard DRAM 640KB
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       8087

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Turbo switch                JP1       Speaker                   JP2C

  Turbo LED                   JP2A      Reset switch              JP2D

  Power LED & keylock         JP2B

                        USER CONFIGURABLE SETTINGS

                Function                     Switch          Position

     Factory configured - do not            SW1/1             Off
      alter

     NPU disabled                           SW1/2              On

      NPU enabled                            SW1/2             Off

     Factory configured - do not            SW1/3             Off
      alter

     Factory configured - do not            SW1/4             Off
      alter

                            DRAM CONFIGURATION

   Size      Bank 0     Bank 1     Bank 2    Bank 2A   Bank 3    Bank 3A

  256KB        (9)       NONE       NONE      NONE      NONE       NONE
             41256

  512KB        (9)        (9)       NONE      NONE      NONE       NONE
             41256      41256

  576KB        (9)        (9)        (2)       (1)      NONE       NONE
             41256      41256       4464      4164

  640KB        (9)        (9)        (2)       (1)       (2)     (1) 4164
             41256      41256       4464      4164      4464

          DISPLAY ADAPTER SWITCH CONFIGURATION

       Size              SW1/5              SW1/6

  None installed           On                 On

  Color (40 x 20)         Off                 On

  Color (80 x 25)          On                Off

    Monochrome            Off                Off

             FLOPPY DRIVE SWITCH CONFIGURATION

  Drives installed         SW1/7               SW1/8

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off

