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J-656HXA Motherboard Settings and Configuration






J-MARK COMPUTER CORPORATION

J-656HXA

Processor

Pentium

Processor Speed

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

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

384MB

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

280mm x 220mm

I/O Options

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

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Reset switch

J5

Serial port 2

CN2

IDE interface LED

J6

Floppy drive interface

CN3

Power LED & keylock

J7

Parallel port

CN4

Turbo LED

J8

IDE interface 2

CN5

Green PC connector

JP16

IDE interface 1

CN6

Chassis fan power

JP36

PS/2 mouse interface

J2

IR connector

JP37

Speaker

J4

32-bit PCI slots

PC1 – PC3

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

CMOS memory normal operation

J12

Pins 2 & 3 closed

 

CMOS memory clear

J12

Pins 3 & 4 closed

 

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

 

PS/2 mouse IRQ12 enabled

JPS1

Closed

 

PS/2 mouse IRQ12 disabled

JPS1

Open

 

Flash BIOS voltage select 12v

JP17

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP17

Pins 2 & 3 closed

»

Factory configured - do not alter

JP26

Unidentified

»

Factory configured - do not alter

JP30

Unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

8MB

(2) 1M x 36

None

None

16MB

(2) 2M x 36

None

None

16MB

(2) 1M x 36

(2) 1M x 36

None

24MB

(2) 1M x 36

(2) 2M x 36

None

24MB

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

24MB

(2) 2M x 36

(2) 1M x 36

None

32MB

(2) 4M x 36

None

None

32MB

(2) 1M x 36

(2) 1M x 36

(2) 2M x 36

32MB

(2) 2M x 36

(2) 2M x 36

None

40MB

(2) 1M x 36

(2) 4M x 36

None

48MB

(2) 1M x 36

(2) 1M x 36

(2) 4M x 36

48MB

(2) 2M x 36

(2) 4M x 36

None

48MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

None

64MB

(2) 2M x 36

(2) 2M x 36

(2) 4M x 36

64MB

(2) 4M x 36

(2) 4M x 36

None

72MB

(2) 1M x 36

(2) 8M x 36

None

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

72MB

(2) 4M x 36

(2) 4M x 36

(2) 1M x 36

80MB

(2) 1M x 36

(2) 1M x 36

(2) 8M x 36

80MB

(2) 2M x 36

(2) 8M x 36

None

80MB

(2) 4M x 36

(2) 4M x 36

(2) 2M x 36

96MB

(2) 2M x 36

(2) 2M x 36

(2) 8M x 36

96MB

(2) 4M x 36

(2) 8M x 36

None

96MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

128MB

(2) 16M x 36

None

None

128MB

(2) 4M x 36

(2) 4M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

None

136MB

(2) 1M x 36

(2) 16M x 36

None

136MB

(2) 8M x 36

(2) 8M x 36

(2) 1M x 36

144MB

(2) 1M x 36

(2) 1M x 36

(2) 16M x 36

144MB

(2) 2M x 36

(2) 16M x 36

None

144MB

(2) 8M x 36

(2) 8M x 36

(2) 2M x 36

160MB

(2) 2M x 36

(2) 2M x 36

(2) 16M x 36

160MB

(2) 4M x 36

(2) 16M x 36

None

160MB

(2) 8M x 36

(2) 8M x 36

(2) 4M x 36

192MB

(2) 4M x 36

(2) 4M x 36

(2) 16M x 36

192MB

(2) 8M x 36

(2) 16M x 36

None

192MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

256MB

(2) 8M x 36

(2) 8M x 36

(2) 16M x 36

264MB

(2) 16M x 36

(2) 16M x 36

(2) 1M x 36

272MB

(2) 16M x 36

(2) 16M x 36

(2) 2M x 36

288MB

(2) 16M x 36

(2) 16M x 36

(2) 4M x 36

320MB

(2) 16M x 36

(2) 16M x 36

(2) 8M x 36

384MB

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

SL1

TAG

256KB (A)

(2) 32K x 32

Not installed

(1) 32K x 8

256KB (B)

None

256KB module installed

(1) 32K x 8

512KB (A)

(2) 32K x 32

256KB module installed

(1) 32K x 8

512KB (B)

(2) 64K x 32

Not installed

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP19

JP20

JP35

256KB (A)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

256KB (B)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

512KB (A)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

512KB (B)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

CPU speed

Clock speed

Multiplier

JP22

JP23

JP41

75MHz

50MHz

1.5x

Open

Open

1 & 2, 3 & 4

90MHz

60MHz

1.5x

Open

Open

1 & 2

100MHz

66MHz

1.5x

Open

Open

3 & 4

120MHz

60MHz

2x

Closed

Open

1 & 2

133MHz

66MHz

2x

Closed

Open

3 & 4

150MHz

60MHz

2.5x

Closed

Closed

1 & 2

166MHz

66MHz

2.5x

Closed

Closed

3 & 4

200MHz

66MHz

3x

Open

Closed

3 & 4

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

JP32

JP33

JP34

3.3v

Closed

Open

Open

3.45v

Open

Closed

Open

3.52v

Open

Open

Closed








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