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# EPOX COMPUTER CO., LTD.
P55-TF
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 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), cache slot, IR connector
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | IDE interface | J13 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Green PC LED | J14 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN3 | Turbo LED | J15 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Reset switch | J16 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | Speaker | J17 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Power LED & | J18 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| PS/2 mouse | J3 | IR connector | JP2 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Chassis fan power | J9 | 32-bit PCI slots | PC1 – |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| Green PC | J12 | Cache slot | SL1 |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| | Keyboard clock select depends on | JP4 | Pins 1 & 2 |
| | ISA clock | | closed |
|---+-----------------------------------+-------+------------|
| | Keyboard clock select 12MHz | JP4 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS normal operation | JP6 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS programming mode | JP6 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 12v | JP7 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 5v | JP7 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+----------------------+---------------------|
| 8MB | (2) 1M x 36 | None |
|---------------+----------------------+---------------------|
| 16MB | (2) 2M x 36 | None |
|---------------+----------------------+---------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|---------------+----------------------+---------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|---------------+----------------------+---------------------|
| 32MB | (2) 4M x 36 | None |
|---------------+----------------------+---------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|---------------+----------------------+---------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|---------------+----------------------+---------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|---------------+----------------------+---------------------|
| 64MB | (2) 8M x 36 | None |
|---------------+----------------------+---------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|---------------+----------------------+---------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|---------------+----------------------+---------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|---------------+----------------------+---------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|---------------+----------------------+---------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. Board also accepts x |
| 32 SIMMs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | SL1 | TAG |
|-----------+--------------+------------------+--------------|
| 256KB (A) | (2) 32K x 32 | Not installed | Unidentified |
|-----------+--------------+------------------+--------------|
| 256KB (A) | None | 256KB module | Unidentified |
| | | installed | |
|-----------+--------------+------------------+--------------|
| 512KB (A) | (2) 32K x 32 | 256KB module | Unidentified |
| | | installed | |
|-----------+--------------+------------------+--------------|
| 512KB (B) | (2) 64K x 32 | Not installed | Unidentified |
|-----------+--------------+------------------+--------------|
| 512KB (C) | None | 512KB module | Unidentified |
| | | installed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP10 | JP11 |
|------------------+--------------------+--------------------|
| 256KB (A) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 256KB (A) | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 512KB (A) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 512KB (B) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 512KB (C) | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP3 | JP12 |JP13 | JPS1 | JPS2 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+------+-----+------+------|
|120MHz | 50MHz | 2x |1 & 2|2 & 3 |1 & 2|Closed|Closed|
|-------+--------+----------+-----+------+-----+------+------|
|133MHz | 55MHz | 2x |1 & 2|2 & 3 |1 & 2| Open | Open |
|-------+--------+----------+-----+------+-----+------+------|
|150MHz | 60MHz | 2x |2 & 3|2 & 3 |1 & 2|Closed| Open |
|-------+--------+----------+-----+------+-----+------+------|
|166MHz | 66MHz | 2x |2 & 3|2 & 3 |1 & 2| Open |Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. J8 |
|must be set for correct CPU type. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| Note: The jumper settings for the AMD processor is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP3 | JP12 |JP13 | JPS1 | JPS2 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+------+-----+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2|2 & 3 |2 & 3|Closed|Closed|
|-------+--------+----------+-----+------+-----+------+------|
| 90MHz | 60MHz | 1.5x |2 & 3|2 & 3 |2 & 3|Closed| Open |
|-------+--------+----------+-----+------+-----+------+------|
|100MHz | 66MHz | 1.5x |2 & 3|2 & 3 |2 & 3| Open |Closed|
|-------+--------+----------+-----+------+-----+------+------|
|120MHz | 60MHz | 2x |2 & 3|2 & 3 |1 & 2|Closed| Open |
|-------+--------+----------+-----+------+-----+------+------|
|133MHz | 66MHz | 2x |2 & 3|2 & 3 |1 & 2| Open |Closed|
|-------+--------+----------+-----+------+-----+------+------|
|150MHz | 60MHz | 2.5x |2 & 3|1 & 2 |1 & 2|Closed| Open |
|-------+--------+----------+-----+------+-----+------+------|
|166MHz | 66MHz | 2.5x |2 & 3|1 & 2 |1 & 2| Open |Closed|
|-------+--------+----------+-----+------+-----+------+------|
|180MHz | 60MHz | 3x |2 & 3|1 & 2 |2 & 3|Closed| Open |
|-------+--------+----------+-----+------+-----+------+------|
|200MHz | 66MHz | 3x |2 & 3|1 & 2 |2 & 3| Open |Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. J8 |
|must be set for correct CPU type. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP8A | JP8B | JP8C | JP8D |
|-------+-------------+------------+------------+------------|
| Cyrix | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| AMD | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| P54C | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| P55C | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+