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





A4872

ABC COMPUTER COMPANY, LTD.

A4872

Processor

80486DX

Processor Speed

33MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J9

Turbo LED

J7

Speaker

J10

Turbo switch

J8

Power LED & keylock

J11

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J4

Closed

 

Monitor type select monochrome

J4

Open

Factory configured - do not alter

J5

Open

CMOS memory normal operation

J6

pins 1 & 2 closed

 

CMOS memory clear

J6

pins 2 & 3 closed

Factory configured - do not alter

W1

pins 1 & 2 closed

Factory configured - do not alter

W2

pins 1 & 2 closed

Factory configured - do not alter

W3

pins 1 & 2 closed

Factory configured - do not alter

W4

pins 1 & 2 closed

Factory configured - do not alter

W5

pins 2 & 3 closed

Factory configured - do not alter

W10

Open

Factory configured - do not alter

W11

Open

Factory configured - do not alter

W15

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) 256K x 9

(4) 1 M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

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

(4) 16K x 4

128KB

(4) 32K x 8

NONE

(4) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(4) 16K x 4

CACHE JUMPER CONFIGURATION

Size

W6

W7

W8

W9

64KB

pins 1 & 2 closed

pins 1 & 2 closed

Open

pins 1 & 2 closed

128KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

W12

W13

W14

80486SX

Open

pins 2 & 3 closed

Open

80487SX

Closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed