
ICL

CS486S

Processor             80487SX/80486DX
Processor Speed       20/33MHz
Chip Set              Unidentified
Max. Onboard DRAM     26MB
Cache                 None
BIOS                  ICL
Dimensions            330mm x 218mm
I/O Options           PS/2 mouse port, parallel port, serial ports (2),
                      VGA port, floppy drive interface, IDE interface
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Parallel port               CN1      Floppy drive interface      CN7

  Serial port 1               CN2      PS/2 mouse connector        CN8

  Serial port 2               CN3      Keyboard connector          CN9

  VGA port                    CN4      Front panel connector      CN10

  External battery            CN5      Riser slot                  SL1

  IDE interface               CN6

                        USER CONFIGURABLE SETTINGS

               Function                  Jumper/Switch        Position

     On board VGA enabled                     J1             pins 1 & 2
                                                               closed

      On board VGA disabled                    J1             pins 2 & 3
                                                               closed

     Factory configured - do not              J2             pins 1 & 2
      alter                                                    closed

     Factory configured - do not              J3             pins 1 & 2
      alter                                                    closed

     Factory configured - do not              J4              Closed
      alter

     Factory configured - do not              J5             pins 1 & 2
      alter                                                    closed

     Factory configured - do not              J6             pins 1 & 2
      alter                                                    closed

     Factory configured - do not              J7             pins 2 & 3
      alter                                                    closed

     BIOS type select 27512                  J15             pins 1 & 2
                                                               closed

      BIOS type select 27256                  J15             pins 2 & 3
                                                               closed

     CMOS memory normal operation            J18               Open

      CMOS memory clear                       J18              Closed

     VGA uses 0 wait states                  J22             pins 2 & 3
                                                               closed

      VGA uses IRQ9                           J22             pins 1 & 2
                                                               closed

     ATREF# enabled                          J23             pins 1 & 2
                                                               closed

      ATREF# disabled                         J23             pins 2 & 3
                                                               closed

     BIOS bit select 8-bit BIOS              J71             pins 2 & 3
                                                               closed

      BIOS bit select 16-bit BIOS             J71             pins 1 & 2
                                                               closed

     Floppy drive interface enabled         SW1/1               On

      Floppy drive interface                 SW1/1               Off
      disabled

     IDE interface enabled                  SW1/2               On

      IDE interface disabled                 SW1/2               Off

     Serial port 1 enabled                  SW1/3               On

      Serial port 1 disabled                 SW1/3               Off

     Serial port 2 enabled                  SW1/4               On

      Serial port 2 disabled                 SW1/4               Off

     Parallel port enabled                  SW1/5               On

      Parallel port disabled                 SW1/5               Off

     Memory 0F0000H-0FFFFFFH                SW1/6               Off
      available for expansion

      Memory 0F0000H-0FFFFFFH                SW1/6               On
      reserved for system board

     Reset disabled                         SW1/7               Off

      Reset enabled                          SW1/7               On

     Password disabled                      SW1/8               On

      Password enabled                       SW1/8               Off

  Note: The location of jumpers J2, J4, J5, J6, &J7 and SW1 are
  unidentified.

                            DRAM CONFIGURATION

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     2MB           2MB           NONE           NONE            NONE

     4MB           2MB         (1) 512K x       NONE            NONE
                                  36

     6MB           2MB         (1) 512K x     (1) 512K x        NONE
                                  36             36

     6MB           2MB        (1) 1M x 36       NONE            NONE

     8MB           2MB         (1) 512K x     (1) 512K x    (1) 512K x 36
                                  36             36

     8MB           2MB         (1) 512K x    (1) 1M x 36        NONE
                                  36

     10MB          2MB         (1) 512K x     (1) 512K x     (1) 1M x 36
                                  36             36

     10MB          2MB        (1) 2M x 36       NONE            NONE

     12MB          2MB         (1) 512K x    (1) 2M x 36        NONE
                                  36

     14MB          2MB         (1) 512K x     (1) 512K x     (1) 2M x 36
                                  36             36

     14MB          2MB        (1) 1M x 36    (1) 2M x 36        NONE

     16MB          2MB         (1) 512K x    (1) 1M x 36     (1) 2M x 36
                                  36

     18MB          2MB        (1) 2M x 36    (1) 2M x 36        NONE

     20MB          2MB         (1) 512K x    (1) 2M x 36     (1) 2M x 36
                                  36

     22MB          2MB        (1) 1M x 36    (1) 2M x 36     (1) 2M x 36

     26MB          2MB        (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

  Note: Bank 0 is factory installed and is not configurable.

  CPU SPEED CONFIGURATION

    Speed         JP102

    20MHz         Closed

    33MHz          Open

