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





MB-1425AEA-V, MB-1433AEA-V, MB-1440AEA-V, MB-1450AEA-V

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425AEA-V, MB-1433AEA-V, MB-1440AEA-V, MB-1450AEA-V

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

Advanced

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP8

Turbo switch

JP15E

Speaker

JP15A

5V ground connector

JP15F

Power LED & keylock

JP15B

32-bit VESA Local bus slot

S1

Turbo LED

JP15C

32-bit VESA Local bus slot

S2

Reset switch

JP15D

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J01

N/A

Factory configured - do not alter

JP4

pins 2 & 3 closed

 

7 Bit TAG RAM installed

JP6

pins 1 & 2 closed

 

8 Bit TAG RAM installed

JP6

pins 2 & 3 closed

 

Dallas Real time clock 1287 installed

JP11

Closed

 

Battery & Real time clock 146818 installed

JP11

Open

Monitor type select color

JP14

pins 2 & 3 closed

 

Monitor type select monochrome

JP14

pins 1 & 2 closed

CMOS memory normal operation

JP16

pins 2 & 3 closed

 

CMOS memory clear

JP16

pins 1 & 2 closed

CPU PQFP installed

JP22

pins 1 & 2 closed

 

CPU PGA installed

JP22

pins 2 & 3 closed

VESA bus clock asynchronous mode

JP26

pins 1 & 2 closed

 

VESA bus clock synchronous mode

JP26

pins 2 & 3 closed

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) 1M 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

Max Cachable

Bank 0

Bank 1

TAG

64KB

8MB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

16MB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

32MB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP12

JP19

64KB

Open

pins 1 & 2 closed

128KB

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

256KB

Closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP13

JP20

80486SX

Open

pins 1 & 2 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

ODP486SX

pins 1 & 2 closed

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JP5

JP10

JP23

JP24

25MHz

pins 2 & 3 closed

Open

Open

Open

33MHz

pins 2 & 3 closed

Open

Closed

Open

40MHz

pins 1 & 2 closed

Closed

Open

Closed

50i MHz

pins 2 & 3 closed

Open

Open

Open

50MHz

pins 1 & 2 closed

Closed

Open

Open

66i MHz

pins 2 & 3 closed

Open

Closed

Open

VESA WAIT STATE CONFIGURATION

Wait states

J02

0 wait states

pins 1 & 2 closed

1 wait state

pins 2 & 3 closed