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MST 486A GENERATION STANDARD Motherboard Settings and Configuration






UNIDENTIFIED

MST 486A GENERATION STANDARD

Processor

80486DX

Processor Speed

25MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

SRAM Cache

128KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J4

Speaker

J2

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

Monitor type select Color

JP1

pins 1 & 2 closed

 

Monitor type select Monochrome

JP1

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

Bank Type

1MB

(4) 256K x 9

NONE

NONE

NONE

A

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

A

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

A

4MB

NONE

NONE

NONE

(36) 411000

B

4MB

(4) 1M x 9

NONE

NONE

NONE

A

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

A

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

A

7MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(36) 411000

B

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

A

9MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

NONE

A

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(36) 411000

B

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

A

13MB

(4) 256k x 9

(4) 1M x 9

(4) 1M x 9

(36) 411000

B

16MB

(4) 1 M x 9

(4) 1M x 9

(4) 1M x 9

(36) 411000

B

Note: pins are shown in the closed position

CACHE CONFIGURATION

Size

Cache

128KB

(16) 8K x 8








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