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J-648AP Motherboard Settings and Configuration






J-MARK COMPUTER CORPORATION

J-648AP

Processor

CX M1/IBM 6X86/AM K5/Pentium

Processor Speed

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

Chip Set

SIS

Video Chip Set

None

Maximum Onboard Memory

512MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

250mm 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), VGA feature connector, VGA interface, IR connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Chassis fan power

CN1

Parallel port

J6

Speaker

CN2

Serial port 2

J7

Reset switch

CN3

Floppy drive interface

J8

Turbo LED

CN4

IR connector

J9

Turbo switch

CN5

VGA feature connector

J10

IDE interface LED

CN6

VGA interface

J11

Green PC connector

CN7

IDE interface 2

J14

Power LED & keylock

CN8

IDE interface 1

J15

PS/2 mouse interface

J1

32-bit PCI slots

PC1 – PC3

Serial port 1

J2

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

CMOS memory normal operation

J18

Pins 2 & 3 closed

 

CMOS memory clear

J18

Pins 3 & 4 closed

 

Flash BIOS voltage select 12v

JP5

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP5

Pins 2 & 3 closed

»

Factory configured - do not alter

JP10

Unidentified

»

Factory configured - do not alter

JP18

Unidentified

»

Factory configured - do not alter

JP25

Unidentified

 

Monitor type select color

JP29

Closed

 

Monitor type select monochrome

JP29

Open

 

PS/2 mouse IRQ12 enabled

JP48

Closed

 

PS/2 mouse IRQ12 disabled

JP48

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(2) 512K x 36

None

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

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

128MB

(2) 8M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

136MB

(2) 16M x 36

(2) 1M x 36

144MB

(2) 16M x 36

(2) 2M x 36

160MB

(2) 16M x 36

(2) 4M x 36

192MB

(2) 16M x 36

(2) 8M x 36

256MB

(2) 32M x 36

None

256MB

(2) 16M x 36

(2) 16M x 36

264MB

(2) 32M x 36

(2) 1M x 36

272MB

(2) 32M x 36

(2) 2M x 36

288MB

(2) 32M x 36

(2) 4M x 36

320MB

(2) 32M x 36

(2) 8M x 36

384MB

(2) 32M x 36

(2) 16M x 36

512MB

(2) 32M x 36

(2) 32M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

TAG

256KB

(2) 32K x 32

(1) 32K x 8

512KB

(2) 64K x 32

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP3

256KB

Open

512KB

Closed

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP4

JP9

JP11

JP26

120MHz

50MHz

2x

Closed

Open

Closed

1 & 2, 3 & 4

133MHz

66MHz

2x

Closed

Open

Closed

Open

150MHz

60MHz

2x

Closed

Open

Closed

1 & 2

166MHz

66MHz

2x

Closed

Open

Closed

3 & 4

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (IBM)

CPU speed

Clock speed

Multiplier

JP4

JP9

JP11

JP26

133MHz

55MHz

2x

Closed

Open

Closed

Open

150MHz

60MHz

2x

Closed

Open

Closed

1 & 2

166MHz

66MHz

2x

Closed

Open

Closed

3 & 4

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)

CPU speed

Clock speed

Multiplier

JP4

JP9

JP11

JP26

90MHz

60MHz

1.5x

Open

Open

Open

1 & 2

100MHz

66MHz

2x

Open

Open

Open

3 & 4

133MHz

66MHz

2x

Open

Open

Open

3 & 4

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP4

JP9

JP11

JP26

75MHz

50MHz

1.5x

Open

Open

Open

1 & 2, 3 & 4

90MHz

60MHz

1.5x

Open

Open

Open

1 & 2

100MHz

66MHz

1.5x

Open

Open

Open

3 & 4

120MHz

60MHz

2x

Open

Open

Closed

1 & 2

133MHz

66MHz

2x

Open

Open

Closed

3 & 4

150MHz

60MHz

2.5x

Open

Closed

Closed

1 & 2

166MHz

66MHz

2.5x

Open

Closed

Closed

3 & 4

200MHz

66MHz

3x

Open

Closed

Open

3 & 4

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

V core

JP16

JP17

3.3v

2.8v

Pins 1 & 2 closed

Pins 1 & 2 closed

3.3v

3.45v

Pins 3 & 4 closed

Pins 1 & 2 closed

3.3v

3.52v

Pins 5 & 6 closed

Pins 1 & 2 closed

3.45v

2.8v

Pins 1 & 2 closed

Pins 3 & 4 closed

3.45v

3.45v

Pins 3 & 4 closed

Pins 3 & 4 closed

3.45v

3.52v

Pins 5 & 6 closed

Pins 3 & 4 closed

3.52v

2.8v

Pins 1 & 2 closed

Pins 5 & 6 closed

3.52v

3.45v

Pins 3 & 4 closed

Pins 5 & 6 closed

3.52v

3.52v

Pins 5 & 6 closed

Pins 5 & 6 closed








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