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# EFA CORPORATION
E5TX-AT
Device Type Mainboard
Processor CX 6X86/CX 6X86L/CX 686MX/AM K5/AM
K6/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/200/233MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 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
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+---------------+-------------|
| Serial port 2 | CN1 | Speaker | J11/pins |
| | | | 1/3/5/7 |
|-------------------+----------+---------------+-------------|
| Serial port 1 | CN2 | Power LED & | J11/pins |
| | | keylock | 2/4/6/8/10 |
|-------------------+----------+---------------+-------------|
| Floppy drive | CN3 | Turbo LED | J11/pins 11 |
| interface | | | & 12 |
|-------------------+----------+---------------+-------------|
| Parallel port | CN4 | Green PC | J11/pins 13 |
| | | connector | & 14 |
|-------------------+----------+---------------+-------------|
| IDE interface 2 | CN5 | IDE interface | J11/pins 15 |
| | | LED | & 16 |
|-------------------+----------+---------------+-------------|
| IDE interface 1 | CN6 | Reset switch | J11/pins 17 |
| | | | & 18 |
|-------------------+----------+---------------+-------------|
| PS/2 mouse | J1 | Green PC LED | J11/pins 19 |
| interface | | | & 20 |
|-------------------+----------+---------------+-------------|
| IR connector | J4 | External | J12 |
| | | battery | |
|-------------------+----------+---------------+-------------|
| USB connector | J10 | 32-bit PCI | PC1 – PC4 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP13 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP13 | Pins 2 & 3 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 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 | TAG |
|------------------+--------------------+--------------------|
| 256KB | (2) 32K x 32 | Unidentified |
|------------------+--------------------+--------------------|
| 512KB | (2) 64K x 32 | Unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x | 1 & | 1 & | 2 & | 1 & | 2 & |
| | | | 2 | 2 | 3 | 2 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x | 1 & | 1 & | 1 & | 1 & | 2 & |
| | | | 2 | 2 | 2 | 2 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x | 1 & | 1 & | 1 & | 1 & | 2 & |
| | | | 2 | 2 | 2 | 2 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 60MHz | 2.5x | 1 & | 1 & | 2 & | 2 & | 2 & |
| | | | 2 | 2 | 3 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x | 1 & | 1 & | 1 & | 1 & | 2 & |
| | | | 2 | 2 | 2 | 2 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 2.5x | 1 & | 1 & | 1 & | 2 & | 2 & |
| | | | 2 | 2 | 2 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x | 1 & | 1 & | 2 & | 1 & | 1 & |
| | | | 2 | 2 | 3 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x | 1 & | 1 & | 1 & | 1 & | 1 & |
| | | | 2 | 2 | 2 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 1.5x | 1 & | 1 & | 2 & | 1 & | 1 & |
| | | | 2 | 2 | 3 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 1.5x | 1 & | 1 & | 1 & | 1 & | 1 & |
| | | | 2 | 2 | 2 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x | 1 & | 1 & | 2 & | 2 & | 2 & |
| | | | 2 | 2 | 3 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x | 1 & | 1 & | 1 & | 2 & | 2 & |
| | | | 2 | 2 | 2 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x | 1 & | 1 & | 1 & | 2 & | 2 & |
| | | | 2 | 2 | 2 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x | 1 & | 1 & | 1 & | 2 & | 1 & |
| | | | 2 | 2 | 2 | 3 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x | 1 & | 1 & | 1 & | 1 & | 1 & |
| | | | 2 | 2 | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x | 1 & | 1 & | 2 & | 1 & | 1 & |
| | | | 2 | 2 | 3 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x | 1 & | 1 & | 1 & | 1 & | 1 & |
| | | | 2 | 2 | 2 | 2 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 2x | 1 & | 1 & | 2 & | 1 & | 2 & |
| | | | 2 | 2 | 3 | 2 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 2x | 1 & | 1 & | 1 & | 1 & | 2 & |
| | | | 2 | 2 | 2 | 2 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x | 1 & | 1 & | 2 & | 2 & | 2 & |
| | | | 2 | 2 | 3 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x | 1 & | 1 & | 1 & | 2 & | 2 & |
| | | | 2 | 2 | 2 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x | 1 & | 1 & | 1 & | 2 & | 1 & |
| | | | 2 | 2 | 2 | 3 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP1 | JP2 | JP3 | JP6 | JP7 |
| speed | speed | | | | | | |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x | 1 & | 1 & | 1 & | 2 & | 2 & |
| | | | 2 | 2 | 2 | 3 | 3 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x | 1 & | 1 & | 1 & | 2 & | 1 & |
| | | | 2 | 2 | 2 | 3 | 2 |
|---------+-------+------------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x | 1 & | 1 & | 1 & | 1 & | 1 & |
| | | | 2 | 2 | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP9 | JP10 | JP11 | JP12 |
|---------+------------+------------+------------+-----------|
| 2.0v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 2.5v | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 2.8v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 2.9v | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 3.2v | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 3.3v | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 3.45v | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 3.52v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
+------------------------------------------------------------+