J-MARK COMPUTER CORPORATION

J-7FXA/SCSI

Device Type

Mainboard

Processor

Pentium II

Processor Speed

233/266MHz

Chip Set

Intel 440FX

Maximum Onboard Memory

512MB (EDO supported)

Cache

256/512KB (located on Pentium II CPU)

BIOS

Unidentified

Dimensions

305mm x 244mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), SCSI interface, Ultra SCSI interface, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2), ATX power connector, wake on LAN connector, RAID slot

CONNECTIONS

Purpose

Location

Purpose

Location

ATX power connector

ATX

Ultra SCSI interface

J10

Speaker

C1

Floppy drive interface

J11

Reset switch

C2

IDE interface 1

J12

Turbo LED

C3

IDE interface 2

J13

Power LED & keylock

C4

IR connector

J14

Turbo switch

C5

External battery

J18

CPU fan power

J2

Green PC connector

J19

Serial port 1

J3

IDE interface LED

J20

PS/2 mouse port

J4

USB connector 1

J21

Parallel port

J7

USB connector 2

J26

SCSI interface

J8

32-bit PCI slots

PC1 – PC4

Serial port 2

J9

RAID slot

SL1


USER CONFIGURABLE SETTINGS

Function

Label

Position

 

RAID card installed

J15

Pins 2 & 3 closed

 

RAID card not installed

J15

Pins 1 & 2 closed

»

SCSI low byte termination select through BIOS

J16

Open

 

SCSI low byte termination select enabled

J16

Closed

 

CMOS memory normal operation

J18

Pins 2 & 3 closed

 

CMOS memory clear

J18

Pins 3 & 4 closed

 

Battery type select external

J18

Open

»

SCSI high byte termination select enabled

JP1

Pins 1 & 2 closed

 

SCSI high byte termination select through BIOS

JP1

Pins 2 & 3 closed

 

SCSI data bus size select 8-bit

JP3

Open

 

SCSI data bus size select 16-bit

JP3

Closed

 

Flash BIOS voltage select 12v

JP11

Pins 2 & 3 closed

 

Flash BIOS voltage select 5v

JP11

Pins 1 & 2 closed


SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

8MB

(2) 1M x 36

None

None

16MB

(2) 1M x 36

(2) 1M x 36

None

16MB

(2) 2M x 36

None

None

24MB

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

32MB

(2) 2M x 36

(2) 2M x 36

None

32MB

(2) 4M x 36

None

None

48MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

64MB

(2) 4M x 36

(2) 4M x 36

None

64MB

(2) 8M x 36

None

None

96MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

None


SIMM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

128MB

(2) 16M x 36

None

None

136MB

(2) 16M x 36

(2) 1M x 36

None

144MB

(2) 16M x 36

(2) 1M x 36

(2) 1M x 36

144MB

(2) 16M x 36

(2) 2M x 36

None

160MB

(2) 16M x 36

(2) 2M x 36

(2) 2M x 36

160MB

(2) 16M x 36

(2) 4M x 36

None

192MB

(2) 16M x 36

(2) 4M x 36

(2) 4M x 36

192MB

(2) 16M x 36

(2) 8M x 36

None

192MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

256MB

(2) 16M x 36

(2) 8M x 36

(2) 8M x 36

256MB

(2) 16M x 36

(2) 16M x 36

None

256MB

(2) 32M x 36

None

None

264MB

(2) 32M x 36

(2) 1M x 36

None

272MB

(2) 32M x 36

(2) 1M x 36

(2) 1M x 36

272MB

(2) 32M x 36

(2) 2M x 36

None

288MB

(2) 32M x 36

(2) 2M x 36

(2) 2M x 36

288MB

(2) 32M x 36

(2) 4M x 36

None

320MB

(2) 32M x 36

(2) 4M x 36

(2) 4M x 36

320MB

(2) 32M x 36

(2) 8M x 36

None

384MB

(2) 32M x 36

(2) 8M x 36

(2) 8M x 36

384MB

(2) 32M x 36

(2) 16M x 36

None

384MB

(2) 16M x 36

(2) 16M x 36

(2) 16M x 36

512MB

(2) 32M x 36

(2) 16M x 36

(2) 16M x 36


CACHE CONFIGURATION

Note: 256KB/512KB cache is located on the Pentium II CPU.


CPU SPEED SELECTION

CPU speed

Clock speed

Multiplier

JP2

JP4

JP5

JP6

JP7

233MHz

66MHz

3.5x

Open

Open

Open

Closed

Closed

266MHz

66MHz

4x

Open

Closed

Closed

Open

Closed