J-MARK COMPUTER CORPORATION

J-7ZXAS/L
Device Type Mainboard
Processor Cleleron/Pentium II
Processor Speed 233/266/300/333/350/400/450MHz
Chip Set Intel 440ZX
Video Chip Set Unidentified
Audio Chip Set Unidentified
Maximum Onboard Memory 512MB (EDO & SDRAM supported)
Maximum Video Memory 1MB
Maximum Audio Memory Unidentified
Cache 0/128/256/512KB (located on the CPU)
BIOS Award
Dimensions 305mm x 190mm
I/O Options 16-bit ISA slots (2), 32-bit PCI slots (4), AGP slot, ATX power connector, Floppy drive interface, Game/MIDI port, Green PC connector, IDE interfaces (2), IR connector, Line in, Line out, Microphone in, Parallel port, PS/2 mouse port, PS/2 keyboard port, Serial ports (2), USB ports (2)


CONNECTIONS
Purpose

Location

 Purpose

Location
AGP slot

AGP

 IDE interface 0

IDE0
ATX power connector

ATX

 IDE interface 1

IDE1
PS/2 mouse port

CN1

 16-bit ISA slots

IS1 – IS2
PS/2 keyboard port

CN2

 IR connector

J7
USB port 1

CN3

 Soft off power supply

JP2/Pins 2 & 4
USB port 2

CN4

 Unidentified

JP4
Serial port 1

CN5

 IDE interface LED

JP5/Pins 1 & 3
Serial port 2

CN6

 Green PC connector

JP5/Pins 2 & 4
Parallel port

CN7

 Audio in - CD ROM (Panasonic) JP6
Line out CN8 Audio in - CD ROM (Sony) JP7
Line in CN9 Power LED & keylock

JP9/Pins 1 - 5
Microphone CN10 Turbo switch

JP9/Pins 6 - 8
Game/MIDI port

CN11

 Speaker

JP9/Pins 9 -12
CPU fan power

CPUFAN

 Reset switch

JP9/Pins 13 & 14
Fan power 1

FAN1

 Turbo LED

JP9/Pins 15 & 16
Fan power 2

FAN2

 32-bit PCI slots

PC1 – PC4
Floppy drive interface

FDC

 CPU Thermal Sensor connector

T2


USER CONFIGURABLE SETTINGS

Function

Label

Position

 

 On board sound enabled JP8 Closed
  On board sound disabled JP8 Open


DIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(1) 1M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

16MB

(1) 2M x 64

None

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 2M x 64

(1) 2M x 64

32MB

(1) 4M x 64

None

40MB

(1) 4M x 64

(1) 1M x 64

48MB

(1) 4M x 64

(1) 2M x 64

64MB

(1) 4M x 64

(1) 4M x 64

64MB

(1) 8M x 64

None

72MB

(1) 8M x 64

(1) 1M x 64

80MB

(1) 8M x 64

(1) 2M x 64

96MB

(1) 8M x 64

(1) 4M x 64

128MB

(1) 8M x 64

(1) 8M x 64

128MB

(1) 16M x 64

None

136MB

(1) 16M x 64

(1) 1M x 64

144MB

(1) 16M x 64

(1) 2M x 64

160MB

(1) 16M x 64

(1) 4M x 64

192MB

(1) 16M x 64

(1) 8M x 64

256MB

(1) 16M x 64

(1) 16M x 64

256MB

(1) 32M x 64

None

264MB

(1) 32M x 64

(1) 1M x 64

272MB

(1) 32M x 64

(1) 2M x 64

288MB

(1) 32M x 64

(1) 4M x 64

320MB

(1) 32M x 64

(1) 8M x 64

384MB

(1) 32M x 64

(1) 16M x 64

512MB

(1) 32M x 64

(1) 32M x 64
Note: Board supports EDO & SDRAM memory.


CACHE CONFIGURATION
Note: 256/512KB cache is located on the Pentium II CPUs. 128KB cache is located on the Celeron 300A and greater CPUs.


CMOS RAM/BATTERY SELECTION

Function

JP1

»

 CMOS memory normal operation

Pins 2 & 3 closed
  CMOS memory clear

Pins 3 & 4 closed
  External battery

Pins 1 & 4 closed


POWER ON OPTION

Function

J2

JP3

»

 Power button function

Pins 1 & 2 closed

Pins 1 & 2 closed
  Keyboard power on password Pins 2 & 3 closed Pins 2 & 3 closed


CPU SPEED SELECTION (CELERON)

CPU speed

Clock speed

Multiplier

 J10

U12/1

U12/2

U12/3

U12/4

266MHz

66MHz

4x

 2 & 3

On

On

Off

On

300MHz

66MHz

4.5x

 2 & 3

Off

On

Off

On

333MHz

66MHz

5x

 2 & 3

On

Off

Off

On


CPU SPEED SELECTION (PENTIUM II)

CPU speed

Clock speed

Multiplier

 J10

U12/1

U12/2

U12/3

U12/4

233MHz

66MHz

3.5x

 2 & 3

Off

Off

On

On

266MHz

66MHz

4x

 2 & 3

On

On

Off

On

300MHz

66MHz

4.5x

 2 & 3

Off

On

Off

On

333MHz

66MHz

5x

 2 & 3

On

Off

Off

On

350MHz

100MHz

3.5x

 1 & 2

Off

Off

On

On

400MHz

100MHz

4x

 1 & 2

On

On

Off

On

450MHz

100MHz

4.5x

 1 & 2

Off

On

Off

On