486 CACHE VER. 1 Motherboard Settings and Configuration

Processor

80486DX

Processor Speed

25/33MHz

Chip Set

Hawk

Max. Onboard DRAM

8MB

Cache

64/128/256/512KB (on external cache card)

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot, 32-bit external cache card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

J91

Turbo switch

J25

External cache card

S2

Speaker

J26

External memory card

S8

Power LED & keylock

J27

Reset switch

SW1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

JP1

pins 2 & 3 closed

»

Monitor type select color

JP2

Closed

Monitor type select monochrome

JP2

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

NONE

10MB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

Jumpers 1 - 8 on card should each have pins 2 & 3 closed at all times.

CACHE JUMPER CONFIGURATION

Setting

JP5

JP6

Enabled

Open

Open

Disabled

Closed

Closed

EXTERNAL CACHE CARD JUMPER CONFIGURATION

Size

J1

J2

J3

J4

J5

J6

64KB

Open

1 & 2

Closed

Closed

1 & 2

Closed

128KB

Open

2 & 3

Closed

Open

1 & 2

Closed

256KB

Closed

2 & 3

Open

Closed

2 & 3

Closed

512KB

Closed

2 & 3

Open

Open

2 & 3

Open

Note: Proprietary external cache card fits in expansion slot S2 only. Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Size

JP3

JP4

25MHz

pins 1 & 2 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 2 & 3 closed