HwMuseum | Index

DYNA MICRO, INC.

MBA-386B-25

Processor

80386DX

Processor Speed

25MHz

Chip Set

UMC

Max. Onboard DRAM

12MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Speed display

J1

Speaker

J5

Auxiliary keyboard

J2

Power LED & keylock

J6

Reset switch

J3 & J14

Turbo LED

J7

Turbo switch

J4 & J13

External battery

J11

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome

J8

open

 

Monitor type select color

J8

closed

»

NPU type select 3167 or none

J9

closed

 

NPU type select 80387

J9

open

»

Battery select internal

J12

pins 2 & 3 closed

 

Battery select external

J12

pins 1 & 2 closed

»

Factory configured - do not alter

JP6

pins 1 & 2 closed

»

Factory configured - do not alter

JP7

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

1MB

On

On

On

2MB

On

Off

On

3MB

On

Off

Off

4MB

Off

On

On

8MB

Off

Off

On

12MB

Off

Off

Off

DRAM SPEED CONFIGURATION

Speed

SW1/1

SW1/2

SW1/3

80ns

On

On

On

100ns

On

Off

On