PREMIUM II 386/25 & 386/33

AST RESEARCH, INC.

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.

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.