AST RESEARCH, INC.

BRAVO 286/386SX SYSTEM BOARD (202382-001, 002, 005)

Processor               80386SX
Processor Speed         20MHz
Chip Set                AST
Max. Onboard DRAM       16MB
Cache                   None
BIOS                    AST
Dimensions              355mm x 251mm
I/O Options             16-bit external CPU/NPU card slot, bus mouse port,
                        floppy interface, IDE interface, parallel port,
                        serial ports (2), VGA port
NPU Options             80387SX

[Image]

                                CONNECTIONS

  Purpose               Location     Purpose                   Location

  Bus mouse port          J12        Floppy drive interface       J24

  Parallel port           J13        External battery             J26

  Primary serial          J14        Speaker                      J27
  port

  VGA port                J18        Fan connector                J28

  VGA pass-thru           J19        Front panel                  J29
                                     switch/display

  Secondary serial        J20        16-bit external CPU/NPU      J34
  port header                        card

  IDE interface           J22        Drive active LED             J35
                                     connector

                        USER CONFIGURABLE SETTINGS

                 Function                     Switch         Position

  »   VGA interface enabled                    SW1/1            On

      VGA interface disabled                   SW1/1            Off

  »   Password check normal operation          SW1/2            Off

      Password clear                           SW1/2            On

  »   Factory configured - do not alter        SW1/3            Off

  »   Factory configured - do not alter        SW1/4            Off

  »   Factory configured - do not alter        SW1/5            On

  »   Factory configured - do not alter        SW1/6            On

  »   PS/2 mode enabled (AT mode               SW1/7            On
      disabled)

      PS/2 mode disabled (AT mode              SW1/7            Off
      enabled)

  »   Monitor type select fixed                SW1/8            Off
      frequency

      Monitor type select                      SW1/8            On
      multi-frequency

  »   Factory configured - do not alter        SW1/9            Off

  »   Factory configured - do not alter       SW1/10            Off

                      DRAM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

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

     1.5MB       (2) 256K x 9    (2) 256K x 9    (2) 256K x 9

      2MB         (2) 1M x 9         NONE            NONE

      3MB        (2) 256K x 9    (2) 256K x 9     (2) 1M x 9

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

     4.5MB        (2) 1M x 9      (2) 1M x 9     (2) 256K x 9

      6MB         (2) 1M x 9      (2) 1M x 9      (2) 1M x 9

      8MB         (2) 4M x 9         NONE            NONE

      9MB        (2) 256K x 9    (2) 256K x 9     (2) 4M x 9

      12MB        (2) 1M x 9      (2) 1M x 9      (2) 4M x 9

      16MB        (2) 4M x 9      (2) 4M x 9         NONE