
AST RESEARCH, INC.

Mid-Size Bravo 386SX (Model 202382-005)

Processor               80386SX
Processor Speed         20/25MHz
Chip Set                AST
Max. Onboard DRAM       16MB
SRAM Cache              None
BIOS                    AST
Dimensions              340mm x 245mm
I/O Options             16-bit external CPU card slot, bus mouse port,
                        floppy drive interface, IDE interface, parallel
                        port, serial port (2), SVGA port
NPU Options             80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location     Purpose                Location

  SVGA port                    CN1       Floppy drive             J24
                                         interface

  Bus mouse port               CN2       External battery         J26

  Serial port 1 (COM1)         CN3       Speaker                  J27

  Parallel port                CN4       Fan power                J28

  VGA pass-through             J19       IDE interface LED        J35

  Serial port 2 (COM2)         J20       Front panel              P29
                                         switches & LEDs

  IDE interface                J22       16-bit external CPU       S1
                                         card

                        USER CONFIGURABLE SETTINGS

                 Function                   Switch SW1       Position

     VGA port enabled                       switch 1         closed

      VGA port disabled                      switch 1          open

     Password check enabled                 switch 2          open

      Password check disabled                switch 2         closed

     Factory configured - do not alter      switch 3          open

     Factory configured - do not alter      switch 4          open

     Factory configured - do not alter      switch 5         closed

     Factory configured - do not alter      switch 6         closed

     Monitor type select PS/2 style         switch 7         closed

      Monitor type select AT style           switch 7          open

     Monitor type select VGA or             switch 8          open
      fixed-frequency

      Monitor type select                    switch 8         closed
      multi-frequency

     Factory configured - do not alter      switch 9          open

     Factory configured - do not alter      switch 10         open

  Note:Board uses an 80386SX 20/25MHz CPU card. (AST part numbers
  202401-001 and -002)

                      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      (2) 1M x 9         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

    VRAM CONFIGURATION

    Size         VRAM

    256KB        NONE

    512KB     (2) 44256

