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MB-3A(MB-333SXA)

JETPRO INFOTECH COMPANY, LTD.

MB-3A(MB-333SXA)

Processor

80386SX/CX486SLC

Processor Speed

16/20/25/33MHz

Chip Set

ALI

Max. Onboard DRAM

16MB

SRAM Cache

None

BIOS

AMI/MR

Dimensions

178mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J4

Turbo LED & Turbo switch

J8 pins 1 & 2

Reset switch

J6

Power LED & keylock

J8 pins 4 & 5

Speaker

J7

Power LED & keylock

J9

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

ADS delay enabled

J5

pins 1 & 2 closed

 

ADS delay disabled

J5

pins 2 & 3 closed

NPU mode select synchronous with CPU

JP2

pins 1 & 2 closed

 

NPU mode select asynchronous with CPU

JP2

pins 2 & 3 closed

RTC type select 146818

JP3

open

 

RTC type select 1287

JP3

closed

Monitor type select color

JP4

pins 2 & 3 closed

 

Monitor type select monochrome

JP4

pins 1 & 2 closed

Parity check disabled

JP6

open

 

Parity check enabled

JP6

closed

CPU SPEED CONFIGURATION

CPU Speed

JP1

JP5

16MHz

pins 1 & 2 closed

pins 1 & 2 closed

20MHz

pins 2 & 3 closed

pins 1 & 2 closed

25MHz

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

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

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9