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80486 CACHE SYSTEM

UNIDENTIFIED

80486 CACHE SYSTEM

Processor

80486SX/80487SX/80486DX

Processor Speed

25/33/40/50MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit system card

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Turbo switch

J5

Power LED & keylock

J2

External battery

J6

Reset switch

J3

32-bit system card

SL1

Turbo LED

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

NPU wait state select 0 wait states

JP1

Open

 

NPU wait state select 1 wait state

JP1

Closed

Monitor type select color

JP2

Open

 

Monitor type select monochrome

JP2

Closed

Factory configured - do not alter

JP17

Open

Factory configured - do not alter

JPA

Open

Factory configured - do not alter

JPB

pins 1 & 2 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

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE 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

CACHE CONFIGURATION (TAG)

Size

U15

U16

U17

U18

64KB

NONE

NONE

(1) 16K x 4

(1) 8K x 8

128KB

NONE

NONE

(1) 16K x 4

(1) 8K x 8

256KB

(1) 16K x 4

(1) 16K x 4

(1) 16K x 4

NONE

CACHE JUMPER CONFIGURATION

Size

JP6

JP7

JP8

JP9

64KB

Open

Open

Open

Open

128KB

Closed

Open

Closed

pins 2 & 3 closed

256KB

Closed

Closed

Closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP3

JP4

JP5

80486SX

Open

pins 1 & 2 closed

Open

80487SX

Closed

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

Closed

pins 2 & 3 closed

pins 2 & 3 closed

CLOCK SELECT CONFIGURATION

Clock

JP10

JP11

JP12

CLK/3

pins 1 & 2 closed

Closed

Open

CLK/4

pins 1 & 2 closed

Open

Closed

ECLK/5

pins 1 & 2 closed

Open

Open

CLK/6

pins 1 & 2 closed

Closed

Closed