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MB-8500TAC

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-8500TAC

Processor

Pentium

Processor Speed

75/90/100/120/133/150/166/180MHz

Chip Set

Unidentified

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

AMI

Dimensions

275mm x 220mm

I/O Options

32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VRM connector

NPU Options

None

CONNECTIONS

Function

Label

Function

Label

Serial port 1

CN1

Reset switch

J8 pins 12 & 13

Parallel port

CN2

Green PC connector

J8 pins 17 & 18

Serial port 2

CN3

IDE interface LED

J8 pins 20 & 21

Floppy drive interface

CN4

VCC ground connector

J8 pins 25 & 26

IDE interface 2

CN5

PS/2 mouse port

J11

IDE interface 1

CN6

Chassis fan power

JP19

Speaker

J8 pins 1 - 4

32-bit PCI slots

PC1 - PC3

Power LED & keylock

J8 pins 5 - 9

VRM connector

VRM

Turbo LED

J8 pins 10 & 11

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

Jumper information unavailable

J12

N/A

»

Jumper information unavailable

J13

N/A

»

Jumper information unavailable

J21A

N/A

»

Jumper information unavailable

JP2

N/A

»

CMOS memory normal operation

JP4

Open

 

CMOS memory clear

JP4

Closed

 

Flash BIOS voltage select 5v

JP5

Pins 1 & 2 closed

 

Flash BIOS voltage select 12v

JP5

Pins 2 & 3 closed

 

EPROM installed

JP5

Open

 

Secondary IDE IRQ select IRQ15

JP8

Pins 1 & 2 closed

 

Secondary IDE IRQ select IRQ through PCI

JP8

Pins 2 & 3 closed

»

Primary IDE IRQ14 enabled

JP9

Closed

 

Primary IDE IRQ14 disabled

JP9

Open

»

Jumper information unavailable

JP12

N/A

»

Jumper information unavailable

JP13

N/A

»

Factory configured - do not alter

JP22

Pins 2 & 3 closed

»

Jumper information unavailable

JP30

N/A

»

Jumper information unavailable

JP31

N/A

»

Jumper information unavailable

JP32

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

None

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

24MB

(2) 2M x 36

(2) 1M x 36

24MB

(2) 1M x 36

(2) 2M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

40MB

(2) 4M x 36

(2) 1M x 36

40MB

(2) 1M x 36

(2) 4M x 36

48MB

(2) 4M x 36

(2) 2M x 36

48MB

(2) 2M x 36

(2) 4M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

66MB

(2) 8M x 36

(2) 256K x 36

66MB

(2) 256K x 36

(2) 8M x 36

68MB

(2) 8M x 36

(2) 512K x 36

68MB

(2) 512K x 36

(2) 8M x 36

72MB

(2) 8M x 36

(2) 1M x 36

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 8M x 36

(2) 2M x 36

80MB

(2) 2M x 36

(2) 8M x 36

96MB

(2) 8M x 36

(2) 4M x 36

96MB

(2) 4M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

256KB (A)

None

(2) 32K x 32

None

256KB (B)

(8) 32K x 8

None

(1) 8K/16K/32K x 8

512KB (A)

(8) 64K x 8

None

(1) 16K/32K x 8

512KB (B)

(8) 64K x 8

None

(1) 16K x 8

Note: Board will either have asynchronous or synchronous cache installed.

CACHE JUMPER CONFIGURATION

Size

JP10

None

Open

256KB (B) (STD/Aster TAG)

Open

512KB (A) (STD TAG)

Pins 1 & 2 closed

512KB (B) (Aster TAG)

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

JP6

JP7

JP15

JP16

JP21

75MHz

Open

Open

Open

Open

1 & 2

90MHz

Open

Closed

Open

Open

2 & 3

100MHz

Closed

Closed

Open

Open

2 & 3

120MHz

Open

Closed

Closed

Open

2 & 3

133MHz

Closed

Closed

Closed

Open

2 & 3

150MHz

Open

Closed

Closed

Closed

2 & 3

166MHz

Closed

Closed

Closed

Closed

2 & 3

180MHz

Open

Closed

Open

Closed

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP20

P54C/CS/CQS/CT

Pins 1 & 2, 3 & 4 closed

P55C

Open

CPU VOLTAGE SELECTION

Voltage

JP27

3.4v

Pins 1 & 2 closed

3.5v

Pins 2 & 3 closed

SERIAL PORT 2 SELECTION

Setting

JP35

JP36

Used as COM2/4

Pins 1 & 2 closed

Pins 1 & 2 closed

Used as IR connector

Pins 2 & 3 closed

Pins 2 & 3 closed