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A-B 333SX

UNIDENTIFIED

A-B 333SX

Processor

AM386SX/80386SX

Processor Speed

25/33MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB

Cache

16/32/64/128KB

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

80387SX (exact location unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J10

Turbo switch

JP9

Power LED & keylock

J15

Turbo LED

JP12

Speaker

J18

Reset switch

JP13

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation (internal battery)

JP8

pins 2 & 3 closed

 

CMOS memory normal operation (external battery)

JP8

Open

 

CMOS memory clear

JP8

pins 1 & 2 closed

Monitor type select color

JP10

Closed

 

Monitor type select monochrome

JP10

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(2) 256K x 9

NONE

1MB

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

2.5MB

(2) 1M x 9

(2) 256K x 9

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

16KB

(2) 8K x 8

NONE

32KB

(2) 8K x 8

(2) 8K x 8

64KB

(2) 32K x 8

NONE

128KB

(2) 32K x 8

(2) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

16KB

pins 2 & 3 closed

Open

Open

pins 2 & 3 closed

32KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

64KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

Note: Jumper location is approximated, check board for actual location.