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# KADATCO CO., LTD.
AM-538
Device Type Mainboard
Processor CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/AM
K6/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200/233MHz
Chip Set VIA
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+-------------+-----------------+-----------|
| Power LED & | CN1/pins 1 | IDE interface 1 | CN5 |
| keylock | - 5 | | |
|----------------+-------------+-----------------+-----------|
| Speaker | CN1/pins 7 | IDE interface 2 | CN6 |
| | - 10 | | |
|----------------+-------------+-----------------+-----------|
| IDE interface | CN1/pins 12 | Floppy drive | CN7 |
| LED | & 24 | interface | |
|----------------+-------------+-----------------+-----------|
| Green PC | CN1/pins 17 | Serial port 2 | CN8 |
| connector | & 18 | | |
|----------------+-------------+-----------------+-----------|
| Reset switch | CN1/pins 21 | Parallel port | CN9 |
| | & 22 | | |
|----------------+-------------+-----------------+-----------|
| Serial port 1 | CN3 | USB connector | J3 |
|----------------+-------------+-----------------+-----------|
| PS/2 mouse | CN4 | 32-bit PCI | PC1 – PC4 |
| interface | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | CMOS memory normal operation | JBAT | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JBAT | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JCK4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | CN2 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 4MB | (2) 512K x 36 |
|----------------------------+-------------------------------|
| 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 1 | Bank 2 |
|------------------+--------------------+--------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JACK1 | JACK2 |
|------------------+--------------------+--------------------|
| » | 3.3v | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | 5v | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: The location of the 256KB/512KB is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|120MHz |50MHz | 2x |1 & 2|2 & 3|Open|2 & 3|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|133MHz |55MHz | 2x |1 & 2|2 & 3|Open|2 & 3|2 & 3|1 & 2|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|150MHz |60MHz | 2x |1 & 2|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2x |1 & 2|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |75MHz | 2x |1 & 2|2 & 3|Open|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2.5x |1 & 2|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |75MHz | 2x |1 & 2|2 & 3|Open|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |60MHz | 2.5x |1 & 2|1 & 2|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |66MHz | 3x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|233MHz |75MHz | 2.5x |1 & 2|1 & 2|Open|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86MX) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |60MHz | 2.5x |1 & 2|1 & 2|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |66MHz | 3x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
| 75MHz |50MHz | 1.5x |2 & 3|2 & 3|Open|2 & 3|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
| 90MHz |60MHz | 1.5x |2 & 3|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|100MHz |66MHz | 1.5x |2 & 3|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|120MHz |60MHz | 2x |2 & 3|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|133MHz |66MHz | 2x |2 & 3|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|150MHz |60MHz | 2.5x |1 & 2|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2.5x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2.5x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |66MHz | 3x |2 & 3|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|233MHz |66MHz | 3.5x |2 & 3|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
| 75MHz |50MHz | 1.5x |2 & 3|2 & 3|Open|2 & 3|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
| 90MHz |60MHz | 1.5x |2 & 3|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|100MHz |66MHz | 1.5x |2 & 3|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|120MHz |60MHz | 2x |1 & 2|2 & 3|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|133MHz |66MHz | 2x |1 & 2|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|150MHz |60MHz | 2.5x |1 & 2|1 & 2|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2.5x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|180MHz |60MHz | 3x |2 & 3|1 & 2|Open|1 & 2|2 & 3|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |66MHz | 3x |2 & 3|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IMTEL MMX) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier|JBF1 |JBF2 |JBF3|JCK5 |JCK6 |JCK7 |
| speed |speed | | | | | | | |
|-------+------+----------+-----+-----+----+-----+-----+-----|
|166MHz |66MHz | 2.5x |1 & 2|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|200MHz |66MHz | 3x |2 & 3|1 & 2|Open|2 & 3|1 & 2|2 & 3|
|-------+------+----------+-----+-----+----+-----+-----+-----|
|233MHz |66MHz | 3.5x |2 & 3|2 & 3|Open|2 & 3|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JCK1 | JCK2 | JCK3 |
|----------+----------------+----------------+---------------|
| | 1.8v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 1.9v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.0v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.1v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.2v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.3v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.4v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.5v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.6v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.7v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.8v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 2.9v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 3.0v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 3.1v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 3.2v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| » | 3.3v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 3.4v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed | closed |
|---+------+----------------+----------------+---------------|
| | 3.5v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
|Voltage|JP1/pins 1 &|JP1/pins 3|JP1/pins 5|JP1/pins|JP1/pins|
| | 2 | & 4 | & 6 | 7 & 8 | 9 &10 |
|-------+------------+----------+----------+--------+--------|
| |1.8v| Open | Open | Open | Open | Open |
|--+----+------------+----------+----------+--------+--------|
| |1.9v| Open | Open | Open | Open | Closed |
|--+----+------------+----------+----------+--------+--------|
| |2.0v| Open | Open | Open | Closed | Open |
|--+----+------------+----------+----------+--------+--------|
| |2.1v| Open | Open | Open | Closed | Closed |
|--+----+------------+----------+----------+--------+--------|
| |2.2v| Open | Open | Closed | Open | Open |
|--+----+------------+----------+----------+--------+--------|
| |2.3v| Open | Open | Closed | Open | Closed |
|--+----+------------+----------+----------+--------+--------|
| |2.4v| Open | Open | Closed | Closed | Open |
|--+----+------------+----------+----------+--------+--------|
| |2.5v| Open | Open | Closed | Closed | Closed |
|--+----+------------+----------+----------+--------+--------|
| |2.6v| Open | Closed | Open | Open | Open |
|--+----+------------+----------+----------+--------+--------|
| |2.7v| Open | Closed | Open | Open | Closed |
|--+----+------------+----------+----------+--------+--------|
| |2.8v| Open | Closed | Open | Closed | Open |
|--+----+------------+----------+----------+--------+--------|
| |2.9v| Open | Closed | Open | Closed | Closed |
|--+----+------------+----------+----------+--------+--------|
| |3.0v| Open | Closed | Closed | Open | Open |
|--+----+------------+----------+----------+--------+--------|
| |3.1v| Open | Closed | Closed | Open | Closed |
|--+----+------------+----------+----------+--------+--------|
| |3.2v| Open | Closed | Closed | Closed | Open |
|--+----+------------+----------+----------+--------+--------|
|» |3.3v| Open | Closed | Closed | Closed | Closed |
|--+----+------------+----------+----------+--------+--------|
| |3.4v| Closed | Open | Open | Open | Open |
|--+----+------------+----------+----------+--------+--------|
| |3.5v| Closed | Open | Open | Open | Closed |
+------------------------------------------------------------+