J-MARK COMPUTER CORPORATION

J-656VXC

Processor

CX M1/AM K5/Pentium

Processor Speed

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

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

254mm x 218mm

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), USB connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

CN1

IDE interface 1

J4

Reset switch

CN2

Serial port 2

J5

Turbo LED

CN3

IDE interface 2

J6

IDE interface LED

CN4

Serial port 1

J7

Power LED & keylock

CN5

Floppy drive interface

J8

Turbo switch

CN6

USB connector

J9

Green PC connector

CN7

USB connector

J10

PS/2 mouse interface

J1

External battery

JP4

Parallel port

J3

32-bit PCI slots

PC1 PC4

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

JP2

Unidentified

Factory configured - do not alter

JP9

Unidentified

 

Monitor type select color

JP13

Closed

 

Monitor type select monochrome

JP13

Open

 

Flash BIOS voltage select 12v

JP14

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP14

Pins 2 & 3 closed

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

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

128MB

(2) 8M x 36

(2) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

256KB

(2) 32K x 32

(1) 32K x 8

512KB

(2) 64K x 32

(1) 32K x 8

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP8

JP18

JP19

120MHz

50MHz

2x

Closed

Closed

Open

Closed

Open

133MHz

55MHz

2x

Open

Open

Open

Closed

Open

150MHz

60MHz

2x

Open

Closed

Open

Closed

Open

166MHz

66MHz

2x

Closed

Open

Open

Closed

Open

CPU SPEED SELECTION (AMD)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP8

JP18

JP19

90MHz

60MHz

1.5x

Open

Closed

Open

Open

Open

100MHz

66MHz

1.5x

Closed

Open

Open

Open

Open

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP6

JP7

JP8

JP18

JP19

75MHz

50MHz

1.5x

Closed

Closed

Open

Open

Open

90MHz

60MHz

1.5x

Open

Closed

Open

Open

Open

100MHz

66MHz

1.5x

Closed

Open

Open

Open

Open

120MHz

60MHz

2x

Open

Closed

Open

Closed

Open

133MHz

66MHz

2x

Closed

Open

Open

Closed

Open

150MHz

60MHz

2.5x

Open

Closed

Open

Closed

Closed

166MHz

66MHz

2.5x

Closed

Open

Open

Closed

Closed

200MHz

66MHz

3x

Closed

Open

Open

Open

Closed

CPU TYPE SELECTION

Type

JP3

P54C

Pins 1 & 2, 3 & 4, 5 & 6 closed

P55C

Open

CPU VOLTAGE SELECTION (SINGLE)

Voltage

JP15

JP16

JP17

3.3v

Closed

Open

Open

3.45v

Open

Closed

Open

3.52v

Open

Open

Closed

CPU VOLTAGE SELECTION (DUAL)

Voltage

V core

JP10

JP11

JP12

JP15

JP16

JP17

3.3v

2.5v

Closed

Open

Open

Closed

Open

Open

3.3v

2.8v

Open

Closed

Open

Closed

Open

Open

3.3v

3.45v

Open

Open

Closed

Closed

Open

Open

3.45v

2.5v

Closed

Open

Open

Open

Open

Open

3.45v

2.8v

Open

Closed

Open

Open

Closed

Open

3.45v

3.45v

Open

Open

Closed

Open

Closed

Open

3.52v

2.5v

Closed

Open

Open

Open

Open

Closed

3.52v

2.8v

Open

Closed

Open

Open

Closed

Closed

3.52v

3.45v

Open

Open

Closed

Open

Open

Closed

MOS

CMOS SELECTION

Setting

JP4

JP5

CMOS memory normal operation

Pins 2 & 3 closed

Open

 

CMOS memory clear

Pins 3 & 4 closed

Closed