ABC COMPUTER COMPANY, LTD.

A3889

Processor         80386SX
Processor Speed   25MHz
Chip Set          Headland
Max. Onboard DRAM 8MB
Cache             None
BIOS              AMI
Dimensions        225mm x 220mm
I/O Options       Auxiliary keyboard connector
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  External battery            JP1       Turbo switch             JP10

  Auxiliary keyboard          JP2       Speaker                  JP11
  connector

  Turbo LED                   JP8       Power LED & keylock      JP12

  Reset switch                JP9

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   BIOS type select 27256                   JP3           pins 1 & 2
                                                              closed

      BIOS type select 27128                   JP3           pins 2 & 3
                                                              closed

  »   Pipeline mode enabled                    JP4           pins 1 & 2
                                                              closed

      Pipeline mode disabled                   JP4           pins 2 & 3
                                                              closed

  »   Monitor type select monochrome           JP5             Open

      Monitor type select color                JP5            Closed

  »   CMOS memory normal operation             JP6             Open

      CMOS memory clear                        JP6            Closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     512KB      (2) 256K x 9      NONE           NONE           NONE

      1MB       (2) 256K x 9   (2) 256K x 9      NONE           NONE

     1.5MB      (2) 256K x 9   (2) 256K x 9   (2) 256K x 9      NONE

      2MB       (2) 256K x 9   (2) 256K x 9   (2) 256K x 9  (2) 256K x 9

      2MB        (2) 1M x 9       NONE           NONE           NONE

      3MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9        NONE

      4MB        (2) 1M x 9    (2) 1M x 9        NONE           NONE

     4.5MB       (2) 1M x 9    (2) 1M x 9     (2) 256K x 9      NONE

      5MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9     (2) 1M x 9

      6MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9        NONE

      8MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9     (2) 1M x 9