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MB-8500TAC-A (VER. 4)

PIONEX TECHNOLOGIES, INC.

MB-8500TAC-A (VER. 4)

Processor

CX M1/AM K5/Pentium

Processor Speed

66/75/90/100/120/133/150/166/180/200MHz

Chip Set

Unidentified

Video Chip Set

None

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, PS/2 mouse interface, serial ports (2), IR connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Green PC connector

J8 pins 17 & 18

Parallel port

CN2

IDE interface LED

J8 pins 20 & 21

Serial port 2

CN3

VCC ground connector

J8 pins 25 & 26

Floppy drive interface

CN4

PS/2 mouse port

J11

IDE interface 2

CN5

IR connector

J12

IDE interface 1

CN6

IR connector

J12A

Speaker

J8 pins 1 - 4

PS/2 mouse interface

J13

Power LED & keylock

J8 pins 5 - 9

Chassis fan power

JP19

Turbo LED

J8 pins 10 & 11

32-bit PCI slots

PC1 - PC3

Reset switch

J8 pins 12 & 13

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

JP2

Unidentified

»

CMOS memory normal operation

JP4

Open

 

CMOS memory clear

JP4

Closed

 

Flash BIOS voltage select 12v

JP5

Pins 2 & 3 closed

 

Flash BIOS voltage select 5v

JP5

Pins 1 & 2 closed

 

BIOS type select EPROM

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

»

Factory configured - do not alter

JP12

Unidentified

»

Factory configured - do not alter

JP13

Unidentified

»

Factory configured - do not alter

JP22

Pins 2 & 3 closed

»

Factory configured - do not alter

JP30

Pins 1 & 2 closed

»

Factory configured - do not alter

JP32

Unidentified

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) 1M x 36

(2) 2M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 1M x 36

(2) 4M 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

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 2M x 36

(2) 8M 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 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 (CYRIX)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP15

JP16

JP21

120MHz

50MHz

2x

Open

Open

Open

Closed

1 & 2

133MHz

55MHz

2x

Open

Closed

Open

Closed

1 & 2

150MHz

60MHz

2x

Closed

Closed

Open

Closed

2 & 3

166MHz

66MHz

2x

Closed

Open

Open

Closed

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP15

JP16

JP21

75MHz

66MHz

1x

Closed

Open

Open

Closed

2 & 3

75MHz

50MHz

1.5x

Open

Open

Open

Open

1 & 2

90MHz

55MHz

1.5x

Open

Closed

Open

Open

2 & 3

90MHz

60MHz

1.5x

Closed

Closed

Open

Open

2 & 3

100MHz

66MHz

1.5x

Closed

Open

Open

Open

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP15

JP16

JP21

75MHz

50MHz

1.5x

Open

Open

Open

Open

1 & 2

90MHz

60MHz

1.5x

Closed

Closed

Open

Open

2 & 3

100MHz

66MHz

1.5x

Closed

Open

Open

Open

2 & 3

120MHz

60MHz

2x

Closed

Closed

Open

Closed

2 & 3

133MHz

66MHz

2x

Closed

Open

Open

Closed

2 & 3

150MHz

60MHz

2.5x

Closed

Closed

Closed

Closed

2 & 3

166MHz

66MHz

2.5x

Closed

Open

Closed

Closed

2 & 3

180MHz

60MHz

3x

Closed

Closed

Closed

Open

2 & 3

200MHz

66MHz

3x

Closed

Open

Closed

Open

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP20

JP23

JP24

CX M1

Open

Pins 1 & 2, 4 & 5 closed

Pins 2 & 3, 4 & 5, 7 & 8, 9 & 10 closed

AM K5

Open

Pins 1 & 2, 4 & 5 closed

Pins 2 & 3, 4 & 5, 7 & 8, 9 & 10 closed

P54C/CQS/CT

Open

Pins 1 & 2, 4 & 5 closed

Pins 2 & 3, 4 & 5, 7 & 8, 9 & 10 closed

P55C/CT

Closed

Pins 2 & 3, 5 & 6 closed

Pins 1 & 2, 3 & 4, 6 & 7, 8 & 9 closed

CPU VOLTAGE SELECTION

Voltage

JP27

3.4v

Closed

3.5v

Open

SERIAL PORT 2 SELECTION

Setting

JP35

JP36

Used as COM2

Pins 1 & 2 closed

Pins 1 & 2 closed

Used as IR connector

Pins 2 & 3 closed

Pins 2 & 3 closed