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PREMIUM II 386/25 & 386/33

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)

CONNECTIONS

Purpose

Location

Purpose

Location

SVGA port

CN1

Front panel switches & LEDs

P5

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 CPU/Memory module

S1

Floppy drive interface

P3

32-bit external Memory module slot

S2

Third floppy drive interface

P4

32-bit external Memory module slot

S3

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 alter

SW1/switch 3

Open

Factory configured - do not alter

SW1/switch 4

Open

Factory configured - do not alter

SW1/switch 5

Closed

Factory configured - do not alter

SW1/switch 6

Closed

Monitor type select PS/2 style

SW1/switch 7

Closed

 

Monitor type select AT style

SW1/switch 7

Open

Monitor type select VGA or fixed-frequency

SW1/switch 8

Open

 

Monitor type select multi-frequency

SW1/switch 8

Closed

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.