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# LUCKY STAR TECHNOLOGY CO., LTD.
5TX2B
Device Type Mainboard
Processor CX 6X86/CX 6X86L/CX 686MX/CX M II/AM K5/AM K6/
AM K6-2/Pentium/Pentium MMX
Processor 75/90/100/120/133/150/166/180/200/233/266/300MHz
Speed
Chip Set Intel 430TX
Video Chip None
Set
Maximum 128MB (EDO & SDRAM supported)
Onboard
Memory
Maximum Video None
Memory
Cache 512KB
BIOS Award
Dimensions 230mm x 220mm
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), IR
connector, USB connector, SB-link connector
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+---------------+-------------|
| Chassis fan power | C1 | IR connector | IR1 |
|-------------------+----------+---------------+-------------|
| PS/2 mouse | C2 | SB-link | JP4 |
| interface | | connector | |
|-------------------+----------+---------------+-------------|
| USB connector | J1 | Power LED & | JP11/pins 1 |
| | | keylock | – 5 |
|-------------------+----------+---------------+-------------|
| Serial port | J2 | Speaker | JP11/pins 7 |
| | | | – 10 |
|-------------------+----------+---------------+-------------|
| Serial port | J3 | Reset switch | JP11/pins |
| | | | 12 & 13 |
|-------------------+----------+---------------+-------------|
| Parallel port | J4 | IDE interface | JP11/pins |
| | | LED | 15 & 16 |
|-------------------+----------+---------------+-------------|
| IDE interface 1 | J5 | Turbo LED | JP11/pins |
| | | | 18 & 19 |
|-------------------+----------+---------------+-------------|
| IDE interface 2 | J6 | Green PC | JP11/pins |
| | | connector | 21 & 22 |
|-------------------+----------+---------------+-------------|
| CPU fan power | J7 | 32-bit PCI | PC1 – PC4 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP1 | Closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 5v | JP1 | Open |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Open |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP16 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | PCI CLK select asynchronous | JP17 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | PCI CLK select synchronous | JP17 | 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 |
|------------------------------------------------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 1 | Bank 2 |
|------------------+--------------------+--------------------|
| 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) 8M x 64 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP5 |
|----------------------------+-------------------------------|
| 3.3v | Pins 1 & 3, 2 & 4 closed |
|----------------------------+-------------------------------|
| 5v | Pins 3 & 5, 4 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 50MHz | 2x |1 & 2|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 55MHz | 2x |1 & 2|1 & 2|2 & 3|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 75MHz | 2x |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 55MHz | 2x |1 & 2|1 & 2|2 & 3|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 75MHz | 2x |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 60MHz | 2.5x |2 & 3|1 & 2|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 75MHz | 2x |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 75MHz | 2.5x |2 & 3|1 & 2|2 & 3|2 & 3|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX M II) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 300MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x |2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 1.5x |2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 1.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x |2 & 3|1 & 2|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 266MHz | 66MHz | 4x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 300MHz | 66MHz | 4.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6-2) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 266MHz | 66MHz | 4x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x |2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x |2 & 3|1 & 2|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 180MHz | 60MHz | 3x |2 & 3|1 & 2|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP7 | JP8 | JP9 |JP12 |JP13 |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP14 |
|-------------------------------+----------------------------|
| All CPUs | Pins 1 & 2 closed |
|-------------------------------+----------------------------|
| AM K6266/300MHz only | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP6 |
|--------------------------+---------------------------------|
| Single voltage CPU | Open |
|--------------------------+---------------------------------|
| Dual voltage CPU | Pins 1 & 2, 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP15/pins 1 | JP15/pins | JP15/pins | JP15/pins |
| | & 2 | 3 & 4 | 5 & 6 | 7 & 8 |
|---------+--------------+-----------+-----------+-----------|
| 2.0v | Open | Open | Open | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.1v | Closed | Open | Open | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.2v | Open | Closed | Open | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.3v | Closed | Closed | Open | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.4v | Open | Open | Closed | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.5v | Closed | Open | Closed | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.6v | Open | Closed | Closed | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.7v | Closed | Closed | Closed | Open |
|---------+--------------+-----------+-----------+-----------|
| 2.8v | Open | Open | Open | Closed |
|---------+--------------+-----------+-----------+-----------|
| 2.9v | Closed | Open | Open | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.0v | Open | Closed | Open | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.1v | Closed | Closed | Open | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.2v | Open | Open | Closed | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.3v | Closed | Open | Closed | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.4v | Open | Closed | Closed | Closed |
|---------+--------------+-----------+-----------+-----------|
| 3.5v | Closed | Closed | Closed | Closed |
+------------------------------------------------------------+