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CS486S

ICL

CS486S

Processor

80487SX/80486DX

Processor Speed

20/33MHz

Chip Set

Unidentified

Max. Onboard DRAM

26MB

Cache

None

BIOS

ICL

Dimensions

330mm x 218mm

I/O Options

PS/2 mouse port, parallel port, serial ports (2), VGA port, floppy drive interface, IDE interface

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

Floppy drive interface

CN7

Serial port 1

CN2

PS/2 mouse connector

CN8

Serial port 2

CN3

Keyboard connector

CN9

VGA port

CN4

Front panel connector

CN10

External battery

CN5

Riser slot

SL1

IDE interface

CN6

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

On board VGA enabled

J1

pins 1 & 2 closed

 

On board VGA disabled

J1

pins 2 & 3 closed

Factory configured - do not alter

J2

pins 1 & 2 closed

Factory configured - do not alter

J3

pins 1 & 2 closed

Factory configured - do not alter

J4

Closed

Factory configured - do not alter

J5

pins 1 & 2 closed

Factory configured - do not alter

J6

pins 1 & 2 closed

Factory configured - do not alter

J7

pins 2 & 3 closed

BIOS type select 27512

J15

pins 1 & 2 closed

 

BIOS type select 27256

J15

pins 2 & 3 closed

CMOS memory normal operation

J18

Open

 

CMOS memory clear

J18

Closed

VGA uses 0 wait states

J22

pins 2 & 3 closed

 

VGA uses IRQ9

J22

pins 1 & 2 closed

ATREF# enabled

J23

pins 1 & 2 closed

 

ATREF# disabled

J23

pins 2 & 3 closed

BIOS bit select 8-bit BIOS

J71

pins 2 & 3 closed

 

BIOS bit select 16-bit BIOS

J71

pins 1 & 2 closed

Floppy drive interface enabled

SW1/1

On

 

Floppy drive interface disabled

SW1/1

Off

IDE interface enabled

SW1/2

On

 

IDE interface disabled

SW1/2

Off

Serial port 1 enabled

SW1/3

On

 

Serial port 1 disabled

SW1/3

Off

Serial port 2 enabled

SW1/4

On

 

Serial port 2 disabled

SW1/4

Off

Parallel port enabled

SW1/5

On

 

Parallel port disabled

SW1/5

Off

Memory 0F0000H-0FFFFFFH available for expansion

SW1/6

Off

 

Memory 0F0000H-0FFFFFFH reserved for system board

SW1/6

On

Reset disabled

SW1/7

Off

 

Reset enabled

SW1/7

On

Password disabled

SW1/8

On

 

Password enabled

SW1/8

Off

Note: The location of jumpers J2, J4, J5, J6, &J7 and SW1 are unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

2MB

NONE

NONE

NONE

4MB

2MB

(1) 512K x 36

NONE

NONE

6MB

2MB

(1) 512K x 36

(1) 512K x 36

NONE

6MB

2MB

(1) 1M x 36

NONE

NONE

8MB

2MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

8MB

2MB

(1) 512K x 36

(1) 1M x 36

NONE

10MB

2MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

10MB

2MB

(1) 2M x 36

NONE

NONE

12MB

2MB

(1) 512K x 36

(1) 2M x 36

NONE

14MB

2MB

(1) 512K x 36

(1) 512K x 36

(1) 2M x 36

14MB

2MB

(1) 1M x 36

(1) 2M x 36

NONE

16MB

2MB

(1) 512K x 36

(1) 1M x 36

(1) 2M x 36

18MB

2MB

(1) 2M x 36

(1) 2M x 36

NONE

20MB

2MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

22MB

2MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

26MB

2MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

Note: Bank 0 is factory installed and is not configurable.

CPU SPEED CONFIGURATION

Speed

JP102

20MHz

Closed

33MHz

Open