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# AMPTRON INTERNATIONAL, INC.
PM-7900
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 260mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, serial ports (2), cache slot,
VRM connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | External battery | J7 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Power LED & | J8 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Parallel port | CN3 | Speaker | J9 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN4 | Green PC | JP6 |
| interface | | connector | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Cache slot | SL1 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J5 | VRM connector | VRM |
|-------------------+----------+------------------+----------|
| Reset switch | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| » | Battery type select internal | J7 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Battery type select external | J7 | Closed |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | J7 | Pins 3 & 4 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP4 | Closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 5v | JP4 | Open |
|---+-------------------------------+-------+----------------|
| | Green PC mode enabled | JP6 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Green PC mode disabled | JP6 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM/DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 8MB | None | None | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 16MB | (2) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | None | None | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 16MB | None | (2) 1M x 36 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | None | (2) 2M x 36 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 24MB | None | (2) 1M x 36 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | None | None | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | None | (2) 2M x 36 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 40MB | None | (2) 4M x 36 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 40MB | None | (2) 1M x 36 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | None | (2) 4M x 36 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | None | (2) 2M x 36 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM/DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 64MB | None | None | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | None | (2) 4M x 36 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 72MB | None | (2) 8M x 36 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 72MB | None | (2) 1M x 36 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | None | (2) 8M x 36 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 80MB | None | (2) 2M x 36 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 96MB | None | (2) 8M x 36 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 96MB | None | (2) 4M x 36 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 128MB | None | (2) 8M x 36 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP7 | JP8 | JP9 |
|---------+----------------+----------------+----------------|
| 3.3v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 5v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL1 | TAG |
|--------------+------------------------+--------------------|
| 256KB | 256KB module installed | (1) 8K/16K/32K x 8 |
|--------------+------------------------+--------------------|
| 512KB | 512KB module installed | (1) 16K/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP5 | JP10 | JP11 | JP12 |JP13|
| speed | speed | | | | | | |
|-------+---------+----------+-----+------+------+------+----|
|100MHz | 50MHz | 2x |2 & 3|Closed|Closed|Closed|Open|
|-------+---------+----------+-----+------+------+------+----|
|120MHz | 60MHz | 2x |1 & 2| Open |Closed|Closed|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| JP5 | JP10 |JP11|JP12|JP13|
|---------+-----------+----------+-----+------+----+----+----|
| 100MHz | 66MHz | 1.5x |1 & 2|Closed|Open|Open|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier|JP5 | JP10 | JP11 | JP12 | JP13 |
| speed | speed | | | | | | |
|-------+--------+----------+----+------+------+------+------|
| 75MHz | 50MHz | 1.5x |2 & |Closed|Closed| Open | Open |
| | | | 3 | | | | |
|-------+--------+----------+----+------+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & | Open |Closed| Open | Open |
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|100MHz | 66MHz | 1.5x |1 & |Closed| Open | Open | Open |
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|120MHz | 60MHz | 2x |1 & | Open |Closed|Closed| Open |
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|133MHz | 66MHz | 2x |1 & |Closed| Open |Closed| Open |
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|150MHz | 60MHz | 2.5x |1 & | Open |Closed|Closed|Closed|
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|166MHz | 66MHz | 2.5x |1 & |Closed| Open |Closed|Closed|
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|180MHz | 60MHz | 3x |1 & | Open |Closed| Open |Closed|
| | | | 2 | | | | |
|-------+--------+----------+----+------+------+------+------|
|200MHz | 66MHz | 3x |1 & |Closed| Open | Open |Closed|
| | | | 2 | | | | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP14 |
|----------------------------+-------------------------------|
| | 3.3v | Pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| » | 3.5v | Pins 1 & 2 closed |
+------------------------------------------------------------+