ABC COMPUTER COMPANY, LTD.

A3889

Processor

80386SX

Processor Speed

25MHz

Chip Set

Headland

Max. Onboard DRAM

8MB

Cache

None

BIOS

AMI

Dimensions

225mm x 220mm

I/O Options

Auxiliary keyboard connector

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Turbo switch

JP10

Auxiliary keyboard connector

JP2

Speaker

JP11

Turbo LED

JP8

Power LED & keylock

JP12

Reset switch

JP9

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

BIOS type select 27256

JP3

pins 1 & 2 closed

 

BIOS type select 27128

JP3

pins 2 & 3 closed

Pipeline mode enabled

JP4

pins 1 & 2 closed

 

Pipeline mode disabled

JP4

pins 2 & 3 closed

Monitor type select monochrome

JP5

Open

 

Monitor type select color

JP5

Closed

CMOS memory normal operation

JP6

Open

 

CMOS memory clear

JP6

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

NONE

NONE

NONE

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

1.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

NONE

NONE

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

4.5MB

(2) 1M x 9

(2) 1M x 9

(2) 256K x 9

NONE

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9