Abit 386 AT3

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ABIT COMPUTER CORPORATION

386 AT3

Processor

AMD386DX/80386DX/CX486DLC/Ti486DLC/Ti486SXL2

Processor Speed

33/40MHz

Chip Set

ALI

Max. Onboard DRAM

192MB

Cache

32/128KB

BIOS

AMI/AWARD

Dimensions

230mm x 218mm

I/O Options

Green PC feature connector

NPU Options

80387DX

File:35067-1.png

CONNECTIONS
Purpose Location Purpose Location

External battery

JP3

Speaker

JP11

Turbo switch

JP8

Power LED & keylock

JP12

Turbo LED

JP9

Green PC feature connector

JP15

Reset switch

JP10

USER CONFIGURABLE SETTINGS
Function Jumper/Switch Position

�

CMOS normal operation

JP2

pins 1 & 2

CMOS memory clear

JP2

pins 2 & 3

�

CPU clock select 33MHz

JP13

pins 1 & 2, 3 & 4

CPU clock select 40MHz

JP13

pins 5 & 6

�

128KB cache enabled

JP16

Closed

32KB cache enabled

JP16

Open

Note:Pins designated are in the closed position.

DRAM CONFIGURATION
Size Bank 0 Bank 1/2

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(1) 256K x 36

4MB

(4) 1M x 9

NONE

5MB

(4) 1M x 9

(1) 256K x 36

8MB

(4) 1M x 9

(1) 1M x 36

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(1) 256K x 36

20MB

(4) 4M x 9

(1) 1M x 36

32MB

(4) 4M x 9

(1) 4M x 36

64MB

(4) 16M x 9

NONE

192MB

(4) 16M x 9

(1) 32M x 36

CACHE CONFIGURATION
Size Bank 0 TAG

32KB

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

(1) 16K x 8

CPU TYPE CONFIGURATION
CPU Type JP1 JP5

80386DX

pins 1 & 2 closed

pins 1 & 2 closed

80486DLC

pins 2 & 3 closed

pins 2 & 3 closed

GREEN FEATURE CONNECTOR CONFIGURATION
Pin Function

1

HSYNC

2

Ground

3

VSYNC

4

Ground

5

ENVEDIO

6

Ground

7

Monitor AC power

8

Ground