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# 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 1GB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+------------------+------------|
| ATX power | ATX | IDE interface 1 | CN6 |
| connector | | | |
|-----------------+----------+------------------+------------|
| AGP slot | AGP | IDE interface 2 | CN7 |
|-----------------+----------+------------------+------------|
| Turbo switch | C1 | Floppy drive | CN8 |
| | | interface | |
|-----------------+----------+------------------+------------|
| Power LED & | C2 | Serial port 2 | CN9 |
| keylock | | | |
|-----------------+----------+------------------+------------|
| Turbo LED | C3 | CPU fan power | FAN |
|-----------------+----------+------------------+------------|
| Reset switch | C4 | Chassis fan | FAN1 |
| | | power | |
|-----------------+----------+------------------+------------|
| Speaker | C5 | Chassis fan | FAN2 |
| | | power | |
|-----------------+----------+------------------+------------|
| Serial port 1 | CN1 | IDE interface | FRNT2/pins |
| | | LED | 1 & 3 |
|-----------------+----------+------------------+------------|
| Parallel port | CN2 | Green PC | FRNT2/pins |
| | | connector | 2 & 4 |
|-----------------+----------+------------------+------------|
| PS/2 mouse port | CN3 | Soft off power | FRNT3 |
| | | supply | |
|-----------------+----------+------------------+------------|
| 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 | None | None | None |
| | 64 | | | |
|--------+------------+------------+------------+------------|
| 32MB | (1) 2M x | (1) 2M x | None | None |
| | 64 | 64 | | |
|--------+------------+------------+------------+------------|
| 32MB | (1) 4M x | None | None | None |
| | 64 | | | |
|--------+------------+------------+------------+------------|
| 48MB | (1) 2M x | (1) 2M x | (1) 2M x | None |
| | 64 | 64 | 64 | |
|--------+------------+------------+------------+------------|
| 64MB | (1) 2M x | (1) 2M x | (1) 2M x | (1) 2M x |
| | 64 | 64 | 64 | 64 |
|--------+------------+------------+------------+------------|
| 64MB | (1) 4M x | (1) 4M x | None | None |
| | 64 | 64 | | |
|--------+------------+------------+------------+------------|
| 64MB | (1) 8M x | None | None | None |
| | 64 | | | |
|--------+------------+------------+------------+------------|
| 128MB | (1) 16M x | None | None | None |
| | 64 | | | |
|--------+------------+------------+------------+------------|
| 128MB | (1) 4M x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 64 | 64 | 64 | 64 |
|--------+------------+------------+------------+------------|
| 128MB | (1) 8M x | (1) 8M x | None | None |
| | 64 | 64 | | |
|--------+------------+------------+------------+------------|
| 192MB | (1) 8M x | (1) 8M x | (1) 8M x | None |
| | 64 | 64 | 64 | |
|--------+------------+------------+------------+------------|
| 256MB | (1) 16M x | (1) 16M x | None | None |
| | 64 | 64 | | |
|--------+------------+------------+------------+------------|
| 256MB | (1) 8M x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 64 | 64 | 64 | 64 |
|--------+------------+------------+------------+------------|
| 256MB | (1) 32M x | None | None | None |
| | 64 | | | |
|--------+------------+------------+------------+------------|
| 384MB | (1) 16M x | (1) 16M x | (1) 16M x | None |
| | 64 | 64 | 64 | |
|--------+------------+------------+------------+------------|
| 512MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 16M x |
| | 64 | 64 | 64 | 64 |
|--------+------------+------------+------------+------------|
| 512MB | (1) 32M x | (1) 32M x | None | None |
| | 64 | 64 | | |
|--------+------------+------------+------------+------------|
| 768MB | (1) 32M x | (1) 32M x | (1) 32M x | None |
| | 64 | 64 | 64 | |
|--------+------------+------------+------------+------------|
| 1024MB | (1) 32M x | (1) 32M x | (1) 32M x | (1) 32M x |
| | 64 | 64 | 64 | 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 |
+------------------------------------------------------------+