ABC COMPUTER COMPANY, LTD.

COMPACT 286 VER. 2

Processor         80286
Processor Speed   20MHz
Chip Set          C & T
Max. Onboard DRAM 8MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Reset switch                E5       Speaker                     J19

  MIPS counter                E7       Power LED & keylock         J21

  External battery            J17

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   NPU speed select 10MHz                 E1 & E2         pins 1 & 2
                                                              closed

      NPU speed select slow                  E1 & E2         pins 2 & 3
                                                              closed

  »   BIOS type select 27128                   E3            pins 1 & 2
                                                              closed

      BIOS type select 27256                   E3            pins 2 & 3
                                                              closed

  »   CMOS memory normal operation             E4            pins 1 & 2
                                                              closed

      CMOS memory clear                        E4            pins 2 & 3
                                                              closed

  »   Reset enabled through hardware           E6            pins 1 & 2
      only                                                    closed

      Reset enabled through hardware           E6            pins 2 & 3
      and keyboard                                            closed

  »   Monitor type select monochrome           SW1           pins 1 & 2
                                                              closed

      Monitor type select color                SW1           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

   Size        Bank 0          Bank 1          Bank 2          Bank 3

  512KB      (18) 41256         NONE            NONE            NONE

  640KB      (18) 41256      (18) 4164          NONE            NONE

   1MB       (18) 41256      (18) 41256         NONE            NONE

  1.5MB      (18) 41256      (18) 41256      (18) 41256         NONE

  1.64MB     (18) 41256      (18) 4164       (18) 41256      (18) 41256

   2MB       (18) 41256      (18) 41256      (18) 41256      (18) 41256

   2MB      (18) 411000         NONE            NONE            NONE

   3MB       (18) 41256      (18) 41256      (18) 411000        NONE

   4MB      (18) 411000     (18) 411000         NONE            NONE

  4.64MB     (18) 41256      (18) 4164       (18) 411000    (18) 411000

   5MB       (18) 41256      (18) 41256      (18) 411000    (18) 411000

   6MB      (18) 411000     (18) 411000      (18) 411000        NONE

   8MB      (18) 411000     (18) 411000      (18) 411000    (18) 411000

  Note:Locations of banks within the DRAM area are unknown.