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# EFA CORPORATION
P5TX-ATX
Device Type Mainboard
Processor CX 6X86/CX 6X86L/CX 686MX/AM K5/AM
K6/Pentium/Pentium MMX
Processor Speed 90/100/120/133/150/166/200/233MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 305mm 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, ATX
power connector
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+-----------------+-------------+-------------|
| ATX power | ATX | Power LED & | J15/pins |
| connector | | keylock | 2/4/6/8/10 |
|--------------+-----------------+-------------+-------------|
| Serial port | CN1 | Turbo LED | J15/pins 11 |
| 2 | | | & 12 |
|--------------+-----------------+-------------+-------------|
| Parallel | CN2 | Green PC | J15/pins 13 |
| port | | connector | & 14 |
|--------------+-----------------+-------------+-------------|
| PS/2 mouse | CN3 | IDE | J15/pins 15 |
| port | | interface | & 16 |
| | | LED | |
|--------------+-----------------+-------------+-------------|
| Serial port | CN4 | Reset | J15/pins 17 |
| 1 | | switch | & 18 |
|--------------+-----------------+-------------+-------------|
| IDE | CN5 | Green PC | J15/pins 19 |
| interface 2 | | LED | & 20 |
|--------------+-----------------+-------------+-------------|
| IDE | CN6 | IR | J19 |
| interface 1 | | connector | |
|--------------+-----------------+-------------+-------------|
| Floppy drive | CN7 | External | J20 |
| interface | | battery | |
|--------------+-----------------+-------------+-------------|
| Soft off | J5 | 32-bit PCI | PC1 – PC4 |
| power supply | | slots | |
|--------------+-----------------+-------------+-------------|
| Speaker | J15/pins1/3/5/7 | USB | USB |
| | | connector | |
|------------------------------------------------------------|
| Note: The location of J9 & J15 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP9 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP9 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP11 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16M x 36 | None |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 | Bank 3 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (2) 32K x 32 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+-----+-----+--------+--------|
| 133MHz | 55MHz | 2x | 2 & | 1 & | Closed | Closed |
| | | | 3 | 2 | | |
|--------+--------+------------+-----+-----+--------+--------|
| 150MHz | 60MHz | 2x | 2 & | 1 & | Closed | Open |
| | | | 3 | 2 | | |
|--------+--------+------------+-----+-----+--------+--------|
| 166MHz | 66MHz | 2x | 2 & | 1 & | Open | Open |
| | | | 3 | 2 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+-------+-------+------+------|
| 166MHz | 66MHz | 2x | 2 & 3 | 1 & 2 | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+------+------+--------+------|
| 166MHz | 60MHz | 2.5x | 2 & | 2 & | Closed | Open |
| | | | 3 | 3 | | |
|--------+--------+------------+------+------+--------+------|
| 166MHz | 66MHz | 2x | 2 & | 1 & | Open | Open |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 200MHz | 66MHz | 2.5x | 2 & | 2 & | Open | Open |
| | | | 3 | 3 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+------+------+--------+------|
| 90MHz | 60MHz | 1.5x | 1 & | 1 & | Closed | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 100MHz | 66MHz | 1.5x | 1 & | 1 & | Open | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 120MHz | 60MHz | 1.5x | 1 & | 1 & | Closed | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 133MHz | 66MHz | 1.5x | 1 & | 1 & | Open | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 150MHz | 60MHz | 2.5x | 2 & | 2 & | Closed | Open |
| | | | 3 | 3 | | |
|--------+--------+------------+------+------+--------+------|
| 166MHz | 66MHz | 2.5x | 2 & | 2 & | Open | Open |
| | | | 3 | 3 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+-------+-------+------+------|
| 166MHz | 66MHz | 2.5x | 2 & 3 | 2 & 3 | Open | Open |
|--------+--------+------------+-------+-------+------+------|
| 200MHz | 66MHz | 3x | 1 & 2 | 2 & 3 | Open | Open |
|--------+--------+------------+-------+-------+------+------|
| 233MHz | 66MHz | 3.5x | 1 & 2 | 1 & 2 | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+------+------+--------+------|
| 90MHz | 60MHz | 1.5x | 1 & | 1 & | Closed | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 100MHz | 66MHz | 1.5x | 1 & | 1 & | Open | Open |
| | | | 2 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 120MHz | 60MHz | 2x | 2 & | 1 & | Closed | Open |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 133MHz | 66MHz | 2x | 2 & | 1 & | Open | Open |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+--------+------|
| 150MHz | 60MHz | 2.5x | 2 & | 2 & | Closed | Open |
| | | | 3 | 3 | | |
|--------+--------+------------+------+------+--------+------|
| 166MHz | 66MHz | 2.5x | 2 & | 2 & | Open | Open |
| | | | 3 | 3 | | |
|--------+--------+------------+------+------+--------+------|
| 200MHz | 66MHz | 3x | 1 & | 2 & | Open | Open |
| | | | 2 | 3 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP5 | JP6 | JP7 |
| speed | speed | | | | | |
|--------+--------+------------+-------+-------+------+------|
| 166MHz | 66MHz | 2.5x | 2 & 3 | 2 & 3 | Open | Open |
|--------+--------+------------+-------+-------+------+------|
| 200MHz | 66MHz | 3x | 1 & 2 | 2 & 3 | Open | Open |
|--------+--------+------------+-------+-------+------+------|
| 233MHz | 66MHz | 3.5x | 1 & 2 | 1 & 2 | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP1 | JP12 | JP13 | JP14 | JP15 |
|-----------+----------+---------+---------+--------+--------|
| 2.0v | * | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------+----------+---------+---------+--------+--------|
| 2.5v | * | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------+----------+---------+---------+--------+--------|
| 2.8v | 3 & 5, 4 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|-----------+----------+---------+---------+--------+--------|
| 2.9v | 3 & 5, 4 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|-----------+----------+---------+---------+--------+--------|
| 3.2v | 3 & 5, 4 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
| | & 6 | | | | |
|-----------+----------+---------+---------+--------+--------|
| 3.3v | 1 & 3, 2 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
| | & 4 | | | | |
|-----------+----------+---------+---------+--------+--------|
| 3.4v | * | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|-----------+----------+---------+---------+--------+--------|
| 3.52v | 1 & 3, 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
| | & 4 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. * |
| = Reserved for future CPUs. |
+------------------------------------------------------------+