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





MB-1420C-CH/1433C-CH

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1420C-CH/1433C-CH

Processor

80486SX/80486DX

Processor Speed

20/33MHz

Chip Set

C & T

Max. Onboard DRAM

32MB

Cache

64/128KB

BIOS

AMI

Dimensions

327mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Turbo LED

J4

Power LED & keylock

J2

Turbo switch

J5

Reset switch

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

W4

pins 2 & 3 closed

 

CMOS memory clear

W4

pins 1 & 2 closed

Monitor type select color

W5

Closed

 

Monitor type select monochrome

W5

Open

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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U21)

TAG (U22)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

NONE

Note:Bank 0 = U8, U10, U12, & U14. With 16MB or more of DRAM, 128KB of cache must be installed.

CACHE JUMPER CONFIGURATION

Size

W1

64KB

pins 2 & 3 closed

128KB

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

W2

W3

80486SX-20

Open

Closed

80487SX-20

Closed

Open

80486DX-33

Open

Open

POWER GOOD CONFIGURATION

Type

W6

W7

Signal detect from power supply

pins 1 & 2 closed

pins 1 & 2 closed

Signal detect from board

pins 2 & 3 closed

pins 2 & 3 closed