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





CONTAQ SINGLE CHIP 486 (MS-4123 Ver. 1.1)

COMPUTREND SYSTEMS, INC.

CONTAQ SINGLE CHIP 486 (MS-4123 Ver. 1.1)

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

CONTAQ

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

250mm x 220mm

I/O Options

32-bit VESA card slots (2), auxiliary keyboard connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard

J2

Turbo switch

J5/15 - 17

Power LED & keylock

J5/1 - 5

Turbo LED

J5/12 &13

Speaker

J5/7 - 10

External battery

J4

Reset switch

J5/19 & 20

32-bit VESA card

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP1

Open

 

Monitor type select color

JP1

Closed

 

CPU speed select 20/25MHz

JP3

JP13

pins 2 & 3 closed

open

 

CPU speed select 33MHz

JP3

JP13

pins 1 & 2 closed

open

 

CPU speed select > 33MHz

JP3

JP13

pins 1 & 2 closed

closed

Battery select internal

J4

pins 2 & 3 closed

 

Battery select external

J4

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

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) 256K x 9

(4) 4M x 9

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU JUMPER CONFIGURATION

CPU

JP6

80486DX2

pins 1 & 2, 4 & 5, 8 & 9, 11 & 12

ODP486SX

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11

80486DX

pins 1 & 2, 4 & 5, 8 & 9, 11 & 12

80487SX

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11

80486SX

pins 2 & 5, 3 & 6, 8 & 11, 9 & 12

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG

JP2

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

pins 1 & 2, 4 & 5, 7 & 8, and 10 & 11

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

pins 1 & 2, 4 & 5, 8 & 9, and 11 & 12

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

pins 2 & 3, 5 & 6, 8 & 9, and 11 & 12