J-MARK COMPUTER CORPORATION
J-7ZXAN/L
| Device Type | Mainboard |
| Processor | Celeron/Pentium II |
| Processor Speed | 233/266/300/333/350/400/450MHz |
| Chip Set | Intel 440ZX |
| Video Chip Set | Unidentified |
| Maximum Onboard Memory | 512MB (EDO & SDRAM supported) |
| Maximum Video Memory | 1MB |
| 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, Green PC connector, IDE interfaces (2), IR connector, Parallel port, PS/2 mouse port, PS/2 keyboard port, Serial ports (2), USB ports (2) |
CONNECTIONS |
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| Purpose | Location |
Purpose | Location |
| AGP slot | AGP |
IDE interface 1 | IDE1 |
| ATX power connector | ATX |
16-bit ISA slots | IS1 – IS2 |
| PS/2 mouse port | CN1 |
IR connector | J7 |
| PS/2 keyboard port | CN2 |
Soft off power supply | JP2/Pins 2 & 4 |
| USB port 1 | CN3 |
Unidentified | JP4 |
| USB port 2 | CN4 |
IDE interface LED | JP5/Pins 1 & 3 |
| Serial port 1 | CN5 |
Green PC connector | JP5/Pins 2 & 4 |
| Serial port 2 | CN6 |
Power LED & keylock | JP9/Pins 1 - 5 |
| Parallel port | CN7 |
Turbo switch | JP9/Pins 6 - 8 |
| CPU fan power | CPUFAN |
Speaker | JP9/Pins 9 -12 |
| Fan power 1 | FAN1 |
Reset switch | JP9/Pins 13 & 14 |
| Fan power 2 | FAN2 |
Turbo LED | JP9/Pins 15 & 16 |
| Floppy drive interface | FDC |
32-bit PCI slots | PC1 – PC4 |
| IDE interface 0 | IDE0 |
CPU thermal sensor connector | T2 |
DIMM CONFIGURATION |
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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. | ||
CMOS RAM/BATTERY SELECTION |
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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 |
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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 | |
CACHE CONFIGURATION |
| Note: 256KB/512KB cache is located on the Pentium II CPU. 128KB cache is located on the Celeron CPU and newer CPUs. |
CPU SPEED SELECTION (CELERON) |
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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) |
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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 |