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386 CACHE MAINBOARD

UNIDENTIFIED

386 CACHE MAINBOARD

Processor

80386DX

Processor Speed

33/40MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

External battery

J20

Speaker

J18

Turbo switch

J21

Reset switch

J19

Turbo LED

J22

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP3

Open

 

Monitor type select color

JP3

Closed

CMOS memory normal operation

JP5

pins 1 & 2 closed

 

CMOS memory clear

JP5

pins 2 & 3 closed

Factory configured - do not alter

JP6

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J2

J3

J4

J5

J6

64KB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

128KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP24

JP25

JP26

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed