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# VEXTREC TECHNOLOGY, INC.
GMB-P56IPA (VER. 1.01)
Device Type Mainboard
Processor CX 6X68/AM K5/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Intel 430VX
Video Chip Set S3
Maximum Onboard 128MB (EDO & SDRAM supported)
Memory
Maximum Video 2MB
Memory
Cache 256/512KB
BIOS AMI/Award
I/O Options IDE interfaces (2), floppy drive interface,
parallel port, PS/2 mouse port, serial ports
(2), VGA port, VGA feature connector, cache
slot, expansion slot, IR connector, USB
connectors (2), FIR connector, MPEG module
connector, green PC connector
Dimensions 200mm x 320mm
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| Reset switch | J1 | VGA port | J14 |
|--------------------+----------+-----------------+----------|
| Green PC connector | J2 | Parallel port | J15 |
|--------------------+----------+-----------------+----------|
| Suspend LED | J3 | Serial port 1 | J16 |
|--------------------+----------+-----------------+----------|
| Speaker | J4 | Serial port 2 | J17 |
|--------------------+----------+-----------------+----------|
| IDE interface LED | J5 | USB connector 1 | J18 |
|--------------------+----------+-----------------+----------|
| Power LED & | J6 | USB connector 2 | J19 |
| keylock | | | |
|--------------------+----------+-----------------+----------|
| IDE interface 1 | J7 | FIR connector | J20 |
|--------------------+----------+-----------------+----------|
| IDE interface 2 | J8 | IR connector | J21 |
|--------------------+----------+-----------------+----------|
| Floppy drive | J9 | PS/2 mouse port | J22 |
| interface | | | |
|--------------------+----------+-----------------+----------|
| VGA feature | J12 | Expansion slot | SL1 |
| connector | | | |
|--------------------+----------+-----------------+----------|
| S3 MPEG module | J13 | Cache slot | SL2 |
| upgrade connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS | |
|-----------------------------------------------------+------|
| | S3 MPEG | JP8 | Open |
| | Module | | |
| | not | | |
| | installed | | |
|----------------------------+-----------+------------+------|
| | S3 MPEG Module | JP8 | Closed | |
| | installed | | | |
|---+------------------------+-----------+------------| |
| ยป | CMOS memory normal | JP9 | Open | |
| | operation | | | |
|---+------------------------+-----------+------------| |
| | CMOS memory clear | JP9 | Closed | |
|---+------------------------+-----------+------------| |
| | Flash BIOS voltage | JP13 | Pins 1 & 2 | |
| | select 12v | | closed | |
|---+------------------------+-----------+------------| |
| | Flash BIOS voltage | JP13 | Pins 2 & 3 | |
| | select 5v | | closed | |
|---+------------------------+-----------+------------| |
| | On board VGA enabled | JP14 | Closed | |
|---+------------------------+-----------+------------| |
| | On board VGA disabled | JP14 | Open | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1MB x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 1MB x 36 | (2) 1MB x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 2MB x 36 | None | None |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1MB x 36 | (2) 1MB x 36 | (1) 1MB x 64 |
|------------+---------------+---------------+---------------|
| 24MB | (2) 2MB x 36 | (2) 1MB x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2MB x 36 | (2) 2MB x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4MB x 36 | None | None |
|------------+---------------+---------------+---------------|
| 40MB | (2) 2MB x 36 | (2) 2MB x 36 | (1) 1MB x 64 |
|------------+---------------+---------------+---------------|
| 40MB | (2) 4MB x 36 | (2) 1MB x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | (2) 2MB x 36 | (2) 2MB x 36 | (1) 2MB x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4MB x 36 | (2) 2MB x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4MB x 36 | (2) 4MB x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8MB x 36 | None | None |
|------------+---------------+---------------+---------------|
| 72MB | (2) 4MB x 36 | (2) 4MB x 36 | (1) 1MB x 64 |
|------------+---------------+---------------+---------------|
| 72MB | (2) 8MB x 36 | (2) 1MB x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | (2) 4MB x 36 | (2) 4MB x 36 | (1) 2MB x 64 |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8MB x 36 | (2) 2MB x 36 | None |
|------------+---------------+---------------+---------------|
| 96MB | (2) 4MB x 36 | (2) 4MB x 36 | (1) 4MB x 64 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8MB x 36 | (2) 4MB x 36 | None |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8MB x 36 | (2) 8MB x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+--------------+--------------------+----------------|
| 256KB | (2) 32K x 36 | None | (1) 8K/16K/32K |
| | | | x 8 |
|-------+--------------+--------------------+----------------|
| 512KB | (2) 32K x 36 | 256K module | (1) 8K/16K/32K |
| | | installed at SL2 | x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+----------------------+----------------------|
| 1MB | (2) 256KB x 16 | None |
|--------------+----------------------+----------------------|
| 2MB | (2) 256KB x 16 | (2) 256KB x 16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 60MHz | 2x |1 & 2|2 & 3|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 66MHz | 2x |1 & 2|2 & 3| Open |Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2.5x |1 & 2|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2.5x |1 & 2|2 & 3| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|200MHz | 66MHz | 3x |1 & 2|2 & 3| Open | Open |Closed|
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U8. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+---------+----------+-----+-----+------+------+-----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Open |
|-------+---------+----------+-----+-----+------+------+-----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2| Open | Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|120MHz | 60MHz | 2x |1 & 2|1 & 2|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|133MHz | 66MHz | 2x |1 & 2|1 & 2| Open | Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|150MHz | 60MHz | 2.5x |1 & 2|2 & 3|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|166MHz | 66MHz | 2.5x |1 & 2|2 & 3| Open | Open |Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U8. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+---------+----------+-----+-----+------+------+-----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Open |
|-------+---------+----------+-----+-----+------+------+-----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2| Open | Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|120MHz | 60MHz | 2x |1 & 2|2 & 3|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|133MHz | 66MHz | 2x |1 & 2|2 & 3| Open | Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3| Open | Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|180MHz | 60MHz | 3x |2 & 3|1 & 2|Closed| Open |Open |
|-------+---------+----------+-----+-----+------+------+-----|
|200MHz | 66MHz | 3x |2 & 3|1 & 2| Open | Open |Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U8. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM MMX) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+----------+----------+-----+-----+------+-----+-----|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Closed|Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3| Open |Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|180MHz | 60MHz | 3x |2 & 3|1 & 2|Closed|Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|200MHz | 66MHz | 3x |2 & 3|1 & 2| Open |Open |Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U8. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ALTERNATE CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 50MHz | 2x |1 & 2|2 & 3|Closed|Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 55MHz | 2x |1 & 2|2 & 3|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2x |1 & 2|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2x |1 & 2|2 & 3| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|200MHz | 66MHz | 2.5x |1 & 2|2 & 3| Open |Closed| Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U7. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ALTERNATE CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 60MHz | 2x |1 & 2|1 & 2|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 66MHz | 2x |1 & 2|1 & 2| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2.5x |1 & 2|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2.5x |1 & 2|2 & 3| Open | Open | Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U7. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ALTERNATE CPU SPEED SELECTION (PENTIUM) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 60MHz | 2x |1 & 2|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 66MHz | 2x |1 & 2|2 & 3| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|180MHz | 60MHz | 3x |2 & 3|1 & 2|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|200MHz | 66MHz | 3x |2 & 3|1 & 2| Open | Open | Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U7. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ALTERNATE CPU SPEED SELECTION (PENTIUM MMX) |
|------------------------------------------------------------|
| Speed | Clock |Multiplier| JP4 | JP5 | S1 | S2 | S3 |
| | speed | | | | | | |
|-------+----------+----------+-----+-----+------+-----+-----|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Closed|Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3| Open |Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|180MHz | 60MHz | 3x |2 & 3|1 & 2|Closed|Open |Open |
|-------+----------+----------+-----+-----+------+-----+-----|
|200MHz | 66MHz | 3x |2 & 3|1 & 2| Open |Open |Open |
|------------------------------------------------------------|
|Note: Designated pins should be in the closed position. |
|Settings are with clock generator installed on U7. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | Q2 | JP3 | S4 | S5 | S6 |
|---------+--------------+--------+--------+--------+--------|
| 3.4v | 2 | Closed | N/A | N/A | N/A |
| | transistors | | | | |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.4v | 1 transistor | Closed | Closed | Closed | Closed |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.5v | 2 | Open | N/A | N/A | N/A |
| | transistors | | | | |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.5v | 1 | Open | Closed | Closed | Closed |
| | transistors | | | | |
| | installed | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
|Voltage |Vcore| Q2 | JP3 | S4 | S5 | S6 |
|--------+-----+-----------------------+------+----+----+----|
| 3.4v |2.9v |2 transistors installed|Closed|Open|Open|Open|
+------------------------------------------------------------+