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80486 DX CACHE

UNIDENTIFIED

80486 DX CACHE

Processor

80486SX/80487SX/80486DX

Processor Speed

16/20/25/33MHz

Chip Set

Symphony

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI/DTK

Dimensions

330.2mm x 218.4mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Reset switch

J5

Turbo switch

J3

Speaker

J6

Turbo LED

J4

Power LED & keylock

J7

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 1 & 2 closed

 

CMOS memory clear

JP1

pins 2 & 3 closed

Monitor type select monochrome

JP2

open

 

Monitor type select color

JP2

closed

CPU CONFIGURATION

CPU

JP8

JP9

JP10

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

SRAM JUMPER CONFIGURATION

Jumper

64KB

128KB

256KB

JP3

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

JP4

pins 1 & 2 closed

open

pins 2 & 3 closed

JP5

pins 2 & 3 closed

open

pins 2 & 3 closed

JP6

open

closed

open

JP7

open

closed

open

JP11

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

JP12

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

JP13

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

JP14

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

JP15

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

JP16

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

JP17

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

JP18

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

SRAM CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8