AST RESEARCH, INC.

Power Premium 386/25 (Model 202441-001)

Processor

80386DX (on external CPU/Memory module)

Processor Speed

25MHz

Chip Set

AST

Max. Onboard DRAM

None (16MB on external CPU/Memory module)

SRAM 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

Third floppy drive interface

J25

Bus mouse port

CN2

External battery

J26

Serial port 1 (COM1)

CN3

Speaker

J27

Serial port 2 (COM2)

CN4

Fan power

J28

Parallel port

J13

Front panel switches & LEDs

J29

VGA pass-through

J19

IDE interface LED

J40

IDE interface

J22

32-bit external CPU/Memory module

S1

Floppy drive interface

J24

32-bit external Memory module slots

S2 & S3

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

CMOS memory normal operation

SW1/switch 1

open

 

CMOS memory clear

SW1/switch 1

closed

»

Password check enabled

SW1/switch 2

open

 

Password check disabled

SW1/switch 2

closed

»

Flash BIOS write disabled

SW1/switch 3

open

 

Flash BIOS write enabled

SW1/switch 3

closed

»

VGA port enabled

SW1/switch 4

closed

 

VGA port disabled

SW1/switch 4

open

»

Factory configured - do not alter

E1

closed

»

Factory configured - do not alter

E2

pins 1 & 2 closed

»

Factory configured - do not alter

E3

closed

»

Factory configured - do not alter

E4

open

»

Factory configured - do not alter

E5

open

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.