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# J-MARK COMPUTER CORPORATION
J-571B
Device Type Mainboard
Processor CX 6X86/IBM 6X86/CX 686MX/AM K5/AM K6/Pentium
Processor Speed 75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set SIS
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 512KB
BIOS Award
Dimensions 220mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), IR connector, USB connectors (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| Speaker | C1 | PS/2 mouse | J4 |
| | | interface | |
|--------------------+----------+-----------------+----------|
| Reset switch | C2 | Serial port 1 | J6 |
|--------------------+----------+-----------------+----------|
| Turbo LED | C3 | Parallel port | J7 |
|--------------------+----------+-----------------+----------|
| IDE interface LED | C4 | Serial port 2 | J8 |
|--------------------+----------+-----------------+----------|
| Power LED & | C5 | USB connector 1 | JP1 |
| keylock | | | |
|--------------------+----------+-----------------+----------|
| Turbo switch/green | C6 | USB connector 2 | JP2 |
| PC connector | | | |
|--------------------+----------+-----------------+----------|
| IDE interface 2 | CN1 | Floppy drive | JP4 |
| | | interface | |
|--------------------+----------+-----------------+----------|
| IDE interface 1 | CN2 | CPU fan power | JP14 |
|--------------------+----------+-----------------+----------|
| IR connector | IR1 | 32-bit PCI | PC1 – |
| | | slots | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| | Green PC connector | C6 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Turbo switch | C6 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP3 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 5v | JP3 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | CMOS memory normal operation | JP7 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | JP7 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 8MB | (2) 1M x 36 |
|----------------------------+-------------------------------|
| 16MB | (2) 2M x 36 |
|----------------------------+-------------------------------|
| 32MB | (2) 4M x 36 |
|----------------------------+-------------------------------|
| 64MB | (2) 8M x 36 |
|----------------------------+-------------------------------|
| 128MB | (2) 16M x 36 |
|----------------------------+-------------------------------|
| 256MB | (2) 32M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 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) 16M x 64 | None |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 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 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 512KB | (1) 64K x 64 | (1) 32K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|120MHz |50MHz| 2x | On | Off | Off | On | On | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|133MHz |55MHz| 2x | On | Off | Off | Off | On | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|150MHz |60MHz| 2x | On | Off | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2x | On | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |75MHz| 2x | On | Off | Off | Off | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|120MHz |50MHz| 2x | On | Off | Off | On | On | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|133MHz |55MHz| 2x | On | Off | Off | Off | On | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|150MHz |60MHz| 2x | On | Off | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2x | On | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |75MHz| 2x | On | Off | Off | Off | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |60MHz| 2.5x | On | On | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2.5x | On | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |75MHz| 2x | On | Off | Off | Off | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|233MHz |66MHz| 3x | Off | On | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
| 90MHz |60MHz| 1.5x | Off | Off | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|100MHz |66MHz| 1.5x | Off | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|133MHz |66MHz| 1.5x | Off | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2.5x | On | On | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2.5x | On | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |66MHz| 3x | Off | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|266MHz |66MHz| 4x | On | Off | On | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|300MHz |66MHz| 4.5x | On | On | On | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
| 75MHz |50MHz| 1.5x | Off | Off | Off | On | On | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
| 90MHz |60MHz| 1.5x | Off | Off | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|100MHz |66MHz| 1.5x | Off | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|120MHz |60MHz| 2x | On | Off | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|133MHz |66MHz| 2x | On | Off | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|150MHz |60MHz| 2.5x | On | On | Off | On | On | Off |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2.5x | On | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |66MHz| 3x | Off | On | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier|JP9/1|JP9/2|JP9/3|JP9/4|JP9/5|JP9/6|
| speed |speed| | | | | | | |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|166MHz |66MHz| 2.5x | On | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|200MHz |66MHz| 3x | Off | On | Off | On | Off | On |
|-------+-----+----------+-----+-----+-----+-----+-----+-----|
|233MHz |66MHz| 3.5x | Off | Off | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | JP13 |
|----------------------------+-------------------------------|
| » | 3.3v | Pins 1 & 2 closed |
|----+-----------------------+-------------------------------|
| | 3.45v | Pins 3 & 4 closed |
+------------------------------------------------------------+
+-----------------------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|-----------------------------------------------------------------------------|
|Voltage|JP11/pins|JP11/pins|JP11/pins|JP11/pins|JP11/pins|JP11/pins|JP11/pins|
| | 1 & 2 | 3 & 4 | 5 & 6 | 7 & 8 | 9 & 10 | 11 & 12 | 13 & 14 |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 2.1v | Open | Open | Open | Open | Open | Open | Closed |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 2.8v | Open | Open | Open | Open | Open | Closed | Open |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 2.9v | Open | Open | Open | Open | Closed | Open | Open |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 3.2v | Open | Open | Open | Closed | Open | Open | Open |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 3.3v | Open | Open | Closed | Open | Open | Open | Open |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 3.45v | Open | Closed | Open | Open | Open | Open | Open |
|-------+---------+---------+---------+---------+---------+---------+---------|
| 3.52v | Closed | Open | Open | Open | Open | Open | Open |
+-----------------------------------------------------------------------------+