AST RESEARCH, INC.

PREMIUM II 386/25 & 386/33

MODELS 202373-001 & 202373-002

Processor               80386DX (on external CPU/Memory module)
Processor Speed         25/33MHz
Chip Set                AST
Max. Onboard DRAM       None (16MB on external CPU/Memory module)
Cache                   None (16KB on external CPU/Memory module)
BIOS                    AST
Dimensions              344mm x 250mm
I/O Options             32-bit external CPU/Memory module slot, 32-bit
                        external Memory module slot (2),

                        bus mouse port, floppy drive interface, IDE
                        interface, parallel port, serial port (2), SVGA
                        port
NPU Options             80387/3167(on external CPU/Memory module)

[Image]

                                CONNECTIONS

  Purpose                    Location   Purpose                  Location

  SVGA port                    CN1      Front panel switches       P5
                                        & LEDs

  Bus mouse port               CN2      Speaker                    P6

  Serial port 1                CN3      External battery           P8

  Parallel port                CN4      IDE interface              P11

  Serial port 2                J15      Fan power                 P101

  VGA pass-through             J18      32-bit external            S1
                                        CPU/Memory module

  Floppy drive interface       P3       32-bit external            S2
                                        Memory module slot

  Third floppy drive           P4       32-bit external            S3
  interface                             Memory module slot

                        USER CONFIGURABLE SETTINGS

                Function                     Switch           Position

  »   VGA port enabled                    SW1/switch 1         Closed

      VGA port disabled                   SW1/switch 1          Open

  »   Password check enabled              SW1/switch 2          Open

      Password check disabled             SW1/switch 2         Closed

  »   Factory configured - do not         SW1/switch 3          Open
      alter

  »   Factory configured - do not         SW1/switch 4          Open
      alter

  »   Factory configured - do not         SW1/switch 5         Closed
      alter

  »   Factory configured - do not         SW1/switch 6         Closed
      alter

  »   Monitor type select PS/2 style      SW1/switch 7         Closed

      Monitor type select AT style        SW1/switch 7          Open

  »   Monitor type select VGA or          SW1/switch 8          Open
      fixed-frequency

      Monitor type select                 SW1/switch 8         Closed
      multi-frequency

[Image]

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   Parity check enabled                    E1              Closed

      Parity check disabled                   E1               Open

  Note:AST CPU/Memory module part number is 202403-001 or 202403-004.

                            DRAM CONFIGURATION

          Size                    Bank 0                   Bank 1

           2MB                  (2) 1M x 9                  NONE

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

           8MB                  (2) 4M x 9                  NONE

          10MB                  (2) 1M x 9               (2) 4M x 9

          16MB                  (2) 4M x 9               (2) 4M x 9

  Notes:16KB of SRAM Cache is on the CPU/Memory module. 128KB of DRAM is
  reserved for System

  and VGA BIOS shadowing and cannot be disabled. Up to two of the
  following memory boards

  may be installed in addition to the CPU/Memory module: AST part numbers
  202275-004,

  202275-006, 202387-001, or 202387-005.