J-MARK COMPUTER CORPORATION
J-7LXA, J-7LXA/L
Processor | Pentium II |
Processor Speed | 200/233/266/300MHz |
Chip Set | Intel |
Video Chip Set | None |
Maximum Onboard Memory | 1GB (EDO & SDRAM supported) |
Maximum Video Memory | None |
Cache | 256/512KB (located on Pentium II CPU) |
BIOS | Award |
Dimensions | 305mm x 244mm |
I/O Options | 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2), ATX power connector, AGP slot |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
ATX power connector | ATX | IDE interface 1 | CN6 |
AGP slot | AGP | IDE interface 2 | CN7 |
Turbo switch | C1 | Floppy drive interface | CN8 |
Power LED & keylock | C2 | Serial port 2 | CN9 |
Turbo LED | C3 | CPU fan power | FAN |
Reset switch | C4 | Chassis fan power | FAN1 |
Speaker | C5 | Chassis fan power | FAN2 |
Serial port 1 | CN1 | IDE interface LED | FRNT2/pins 1 & 3 |
Parallel port | CN2 | Green PC connector | FRNT2/pins 2 & 4 |
PS/2 mouse port | CN3 | Soft off power supply | FRNT3 |
USB connector 1 | CN4 | IR connector | IR1 |
USB connector 2 | CN5 | 32-bit PCI slots | PC1 – PC4 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Flash BIOS voltage select 12v | JERP1 | Pins 1 & 2 closed | |
Flash BIOS voltage select 5v | JERP1 | Pins 2 & 3 closed | |
» | CMOS memory normal operation | RTC1 | Pins 2 & 3 closed |
CMOS memory clear | RTC1 | Pins 3 & 4 closed |
DIMM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
16MB | (1) 2M x 64 | None | None | None |
32MB | (1) 2M x 64 | (1) 2M x 64 | None | None |
32MB | (1) 4M x 64 | None | None | None |
48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 | None |
64MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 |
64MB | (1) 4M x 64 | (1) 4M x 64 | None | None |
64MB | (1) 8M x 64 | None | None | None |
128MB | (1) 16M x 64 | None | None | None |
128MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 |
128MB | (1) 8M x 64 | (1) 8M x 64 | None | None |
192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 | None |
256MB | (1) 16M x 64 | (1) 16M x 64 | None | None |
256MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 |
256MB | (1) 32M x 64 | None | None | None |
384MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 | None |
512MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 |
512MB | (1) 32M x 64 | (1) 32M x 64 | None | None |
768MB | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 | None |
1024MB | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 |
Note: Board accepts EDO & SDRAM memory. |
CACHE CONFIGURATION |
Note: 256KB/512KB cache is located on the Pentium II CPU. |
CPU SPEED SELECTION | ||||||
CPU speed | Clock speed | Multiplier | JP1/1 | JP1/2 | JP1/3 | JP1/4 |
200MHz | 66MHz | 3.5x | On | On | On | Off |
233MHz | 66MHz | 4x | On | On | Off | Off |
266MHz | 66MHz | 4.5x | On | Off | On | On |
300MHz | 66MHz | 5x | On | Off | Off | On |