...because we can't all be on the bleeding edge...





80486DX-33/50MHz CONTAQ MAIN BOARD

FUJIKAMA USA, INC.

80486DX-33/50MHz CONTAQ MAIN BOARD

Processor

80486SX/80487SX/80486DX

Processor Speed

16/20/25/33/50MHz

Chip Set

CONTAQ

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

Auxiliary keyboard connector

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Keylock

J3 pins 1 & 2

Turbo switch

J3 pins 15 - 17

Power LED

J3 pins 3 - 5

Reset switch

J3 pins 19 & 20

Speaker

J3 pins 7 - 10

Auxiliary keyboard

J4

Turbo LED

J3 pins 12 & 13

External battery

JP2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

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

TAG

64KB

(8) 8K x 8

(1) 8K x 8

256KB

(8) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

64KB

pins 1A & 2A, 3A & 4A, 1C & 2C, 3C & 4C closed.

256KB

pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed.

CPU TYPE CONFIGURATION

Type

JP7

80486SX

pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed.

80487SX

pins 4A & 4B, 4C & 4D, 2A & 2B, 2C & 2D closed.

80486DX

pins 4A & 4B, 4C & 4D, 1A & 1B, 1C & 1D closed.

CPU SPEED CONFIGURATION

Speed

Crystal OSC1

JP3

JP5

JP6

JP9

16MHz

32MHz

2 & 3

Open

Open

1 & 2

20MHz

40MHz

1 & 2

Open

Open

1 & 2

25MHz

25MHz

1 & 2

Closed

Open

2 & 3

33MHz

33MHz

1 & 2

Open

Closed

2 & 3

50MHz

50MHz

1 & 2

Closed

Closed

2 & 3

Note: Pins designated should be in the closed position.