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MB-1433/1440/1450 UCV-A

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1433/1440/1450 UCV-A

Processor

CX486S/80486SX/80487SX/AMD80486DX/80486DX/ODP486SX/80486DX2/ Pentium Overdrive

Processor Speed

20/25/33/40(internal)/50(internal)/50/66(internal)MHz

Chip Set

VLSI

Max. Onboard DRAM

64MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Turbo switch

J5

Power LED & keylock

J2

5v DC ground

J6

Turbo LED

J3

External battery

JP8

Reset switch

J4

32-bit VESA Local bus slots

SL1, SL2, SL3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP8

pins 2 & 3 closed

 

CMOS memory clear

JP8

pins 3 & 4 closed

Power good signal detect from power supply

JP11

pins 1 & 2 closed

 

Power good signal detect from board

JP11

pins 2 & 3 closed

CPU type select PGA or PQFP on board

JP12

pins 2 & 3 closed

 

CPU type select PQFP and PGA on board - disables PQFP

JP12

pins 1 & 2 closed

Monitor type select monochrome

JP14

pins 1 & 2 closed

 

Monitor type select color

JP14

pins 2 & 3 closed

Weitek Power 9000 VGA card not installed

JP28

pins 1 & 2 closed

 

Weitek Power 9000 VGA card installed

JP28

pins 2 & 3 closed

Note: External battery and CMOS memory configuration share the same jumper. Pins 2 & 3 on JP8 must be closed in order for system to function This is done with either a jumper or external battery installed.

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) 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

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP9

JP10

32KB

2 & 3

Open

Open

Open

Open

64KB

1 & 2

Open

Open

Closed

Open

128KB

2 & 3

2 & 3

Closed

Closed

Open

256KB

1 & 2

1 & 2

Closed

Closed

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP16

JP17

80486SX/CX486S

pins 1 & 2 closed

pins 2 & 3 closed

80487SX/ODP80486SX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX/DX2

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

Pentium Overdrive

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

CPU SPEED CONFIGURATION

Speed

JP21

JP22

JP23

JP27

25MHz

Closed

Open

Closed

Open

33MHz

Closed

Closed

Open

Open

40MHz

Open

Open

Closed

Closed

50MHz

Open

Closed

Open

Closed

50iMHz

Closed

Open

Closed

Open

66iMHz

Closed

Closed

Open

Open

VESA CLOCK CONFIGURATION

Mode

JP25 (SL2)

JP26 (SL1)

JP29 (SL3)

JP30 (SL2 & SL3)

Synchronous

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Asynchronous

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Note: If pins 1 & 2 are closed on JP30, JP25 must remain open.

VESA BUS SPEED CONFIGURATION

Mode

JP19

JP20

Synchronous

pins 2 & 3 closed

pins 1 & 2 closed

Asynchronous

pins 1 & 2 closed (40MHz/50MHz only)

pins 2 & 3 closed (50MHz only)

VESA BUS CONFIGURATION (CIRRUS LOGIC VER. AB)

Mode

JP19

JP20

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

pins 1 & 2 closed

Note: These settings are used only if a Cirrus Logic version AB video card is installed.

VESA BUS CONFIGURATION (CIRRUS LOGIC VER. AC)

Mode

JP19

JP20

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

pins 1 & 2 closed

Note: These settings are used only if a Cirrus Logic version AC video card is installed.