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386 LOCAL-BUS CACHE MAINBOARD

UNIDENTIFIED

386 LOCAL-BUS CACHE MAINBOARD

Processor

AM386DX/80386DX/AM486DXL/CX486DLC

Processor Speed

33/40MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

240mm x 221mm

I/O Options

32-bit VESA local bus slot

NPU Options

80387DX/CX487DLC

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo switch

JP12

Power LED & keylock

J18

32-bit VESA local bus slot

SL1

Speaker

J19

Reset switch

SW1

Turbo LED

JP11

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP3

pins 2 & 3 closed

 

CMOS memory clear

JP3

pins 1 & 2 closed

Monitor type select color

JP4

Closed

 

Monitor type select monochrome

JP4

Open

Factory configured - do not alter

JP7

N/A

Factory configured - do not alter

JP14

N/A

Factory configured - do not alter

JP15

N/A

Factory configured - do not alter

JP16

N/A

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

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

JP6

JP8

JP9

JP10

JP17

JP18

64KB

Open

Open

Open

2 & 3

Open

Open

128KB

Closed

Closed

Open

1 & 2

Open

Closed

256KB

Closed

Closed

Closed

2 & 3

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP1

JP5

JP13

AM486DX

Open

Open

Open

80386DX

Open

Open

Open

AM386DXL

Open

Open

Open

CX486DLC

Closed

Closed

Closed

CPU SPEED CONFIGURATION

Speed

JP2

33MHz

Closed

40MHz

Open