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Processor

80486SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

J4

Speaker

J2

Turbo switch

J5

Reset switch

J3

Power LED & keylock

J7

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Keyboard clock select fixed at 7.159MHz

JP2

pins 2 & 3 closed

Keyboard clock select programmable via BIOS setup

JP2

pins 1 & 2 closed

CMOS memory normal operation

JP3

pins 1 & 2 closed

CMOS memory clear

JP3

pins 2 & 3 closed

Monitor type select color

J6

Closed

Monitor type select monochrome

J6

Open

Power good signal detect from board

JP8

pins 1 & 2 closed

Power good signal detect from power supply

JP8

pins 2 & 3 closed

CPU clock speed select ³

JP16

pins 1 & 2 closed

CPU clock speed select < 25Mz

JP16

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

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

Dirty bit U22

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 16K x 4

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 16K x 4

CACHE JUMPER CONFIGURATION

Size

JP9

JP10

JP11

JP12

JP13

JP14

JP15

64KB

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP5

JP6

JP7

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

Open

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

Closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed