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





486 CONTAQ CACHE

ATLANTIC COMPUTER PRODUCTS, INC.

486 CONTAQ CACHE

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)/50/66(internal)MHz

Chip Set

Contaq

Max. onboard DRAM

32MB

SRAM Cache

64/256KB

BIOS

AMI

Dimensions

238mm x 220mm

I/O Options

32-bit VESA local bus slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP5

Speaker

JP33

Turbo switch

JP30

Power LED & keylock

JP34

Turbo LED

JP31

32-bit VESA local bus slot

S1

Reset switch

JP32

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

CMOS memory normal operation

JP6

pins 1 & 2 closed

 

CMOS memory clear

JP6

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) 256K x 9

(4) 1M x 9

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

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP11

JP12

JP13

JP41

64KB

Open

Open

Open

pins 2 & 3 closed

256KB

Closed

Closed

pins 1 & 2 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

CPU Type

JP2

JP3

JP7

JP8

80486SX

Open

pins 1 & 2 closed

Open

Open

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

Closed

Closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed

CPU SPEED CONFIGURATION

CPU

OSC1

JP15 Type A

JP15 Type B

JP22

JP23

 

20MHz

40MHz

pins 3 & 4

pins 2 & 3

Open

Open

 

25MHz

25MHz

pins 2 & 4

pins 2 & 4

Closed

Open

 

33MHz

33MHz

pins 2 & 4

pins 2 & 4

Open

Closed

 

50i MHz

25MHz

pins 2 & 4

pins 2 & 4

Closed

Open

 

50MHz

50MHz

pins 2 & 4

pins 2 & 4

Closed

Closed

 

66i MHz

33MHz

pins 2 & 4

pins 2 & 4

Open

Closed

 

Note: Check the system board to determine if JP15 is type A or type B.

Pins designated should be in the closed position.

 

CHIPSET CONFIGURATION

Chipset

Mode

LJ4

LJ5

LJ6

82C591

Synchronous mode

pins 2 & 3 closed

Closed

Open

82C591

Asynchronous mode

pins 1 & 2 closed

Open

Open

82C591A

Synchronous mode

pins 2 & 3 closed

Open

Closed

82C591A

Asynchronous mode

pins 1 & 2 closed

Open

Open

VESA WAIT STATE (ID2) CONFIGURATION

Wait states

CPU speed

LJ1 (ID2)

0 wait states

£ 33MHz

Open

1 wait state

> 33MHz

Closed

VESA BUS SPEED (ID3) CONFIGURATION

CPU speed

LJ2 (ID3)

£ 33MHz

Open

> 33MHz

Closed

VESA ID4 CONFIGURATION

Setting

LJ3 (ID4)

Reserved for future use

Closed