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# EPOX COMPUTER CO., LTD.
5BTXB-E
Device Type Mainboard
Processor CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/AM K5/
AM K6/Pentium/Pentium MMX
Processor 90/100/120/133/150/166/188/200/225/233/266/300/333MHz
Speed
Chip Set Intel
Video Chip None
Set
Maximum 256MB (EDO & SDRAM supported)
Onboard
Memory
Maximum None
Video
Memory
Cache 512KB
BIOS Award
Dimensions 220mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface, IDE
(backplane) 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 | IR connector | J2 |
| connector | | | |
|-------------------+----------+------------------+----------|
| USB connector | CN1 | CPU fan power | J3 |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Power LED & | J4A |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Speaker | J4B |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Reset switch | J4C |
|-------------------+----------+------------------+----------|
| Floppy drive | CN5 | Turbo LED | J4D |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN6 | IDE interface | J4E |
| | | LED | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN7 | Soft off power | J5 |
| | | supply | |
|-------------------+----------+------------------+----------|
| PS/2 mouse | J1 | 32-bit PCI slots | PC1 – |
| interface | | | PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | CMOS memory normal operation | JP1 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | JP1 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 |
|----------------------------+-------------------------------|
| 8MB | (2) 1M x 36 |
|----------------------------+-------------------------------|
| 16MB | (2) 2M x 36 |
|----------------------------+-------------------------------|
| 32MB | (2) 4M x 36 |
|----------------------------+-------------------------------|
| 64MB | (2) 8M x 36 |
|----------------------------+-------------------------------|
| 128MB | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|----------------------------+-------------------------------|
| 512KB | (1) 64K x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2.5x | Pins 5 & 6 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2.5x | Pins 7 & 8 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 75MHz | 3x | Pins 9 & 10 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2.5x | Pins 5 & 6 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2.5x | Pins 7 & 8 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 75MHz | 3x | Pins 9 & 10 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2x | Pins 7 & 8 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 60MHz | 2.5x | Pins 11 & 12 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 75MHz | 2x | Pins 9 & 10 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 75MHz | 2.5x | Pins 15 & 16 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3x | Pins 17 & 18 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 75MHz | 3x | Pins 19 & 20 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 3.5x | Pins 21 & 22 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2x | Pins 7 & 8 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 60MHz | 2.5x | Pins 11 & 12 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 75MHz | 2x | Pins 9 & 10 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 75MHz | 2.5x | Pins 15 & 16 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3x | Pins 17 & 18 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 75MHz | 3x | Pins 19 & 20 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 3.5x | Pins 21 & 22 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 90MHz | 60MHz | 1.5x | Pins 1 & 2 closed |
|-----------+-------------+------------+---------------------|
| 100MHz | 66MHz | 1.5x | Pins 3 & 4 closed |
|-----------+-------------+------------+---------------------|
| 120MHz | 60MHz | 2x | Pins 5 & 6 closed |
|-----------+-------------+------------+---------------------|
| 133MHz | 66MHz | 2x | Pins 7 & 8 closed |
|-----------+-------------+------------+---------------------|
| 150MHz | 60MHz | 2.5x | Pins 11 & 12 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 188MHz | 75MHz | 2.5x | Pins 15 & 16 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 17 & 18 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 17 & 18 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3.5x | Pins 21 & 22 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 4x | Pins 23 & 24 closed |
|-----------+-------------+------------+---------------------|
| 300MHz | 66MHz | 4.5x | Pins 25 & 26 closed |
|-----------+-------------+------------+---------------------|
| 333MHz | 66MHz | 5x | Pins 27 & 28 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 90MHz | 60MHz | 1.5x | Pins 1 & 2 closed |
|-----------+-------------+------------+---------------------|
| 100MHz | 66MHz | 1.5x | Pins 3 & 4 closed |
|-----------+-------------+------------+---------------------|
| 120MHz | 60MHz | 2x | Pins 5 & 6 closed |
|-----------+-------------+------------+---------------------|
| 133MHz | 66MHz | 2x | Pins 7 & 8 closed |
|-----------+-------------+------------+---------------------|
| 150MHz | 60MHz | 2.5x | Pins 11 & 12 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 188MHz | 75MHz | 2.5x | Pins 15 & 16 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 17 & 18 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP3 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 13 & 14 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 17 & 18 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3.5x | Pins 21 & 22 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 4x | Pins 23 & 24 closed |
|-----------+-------------+------------+---------------------|
| 300MHz | 66MHz | 4.5x | Pins 25 & 26 closed |
|-----------+-------------+------------+---------------------|
| 333MHz | 66MHz | 5x | Pins 27 & 28 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP2 |
|----------------------------+-------------------------------|
| | 2.1v | Pins 1 & 6 closed |
|---+------------------------+-------------------------------|
| | 2.2v | Pins 2 & 7 closed |
|---+------------------------+-------------------------------|
| » | 2.8v | Pins 3 & 8 closed |
|---+------------------------+-------------------------------|
| | 2.9v | Pins 4 & 9 closed |
|---+------------------------+-------------------------------|
| | 3.2v | Pins 5 & 10 closed |
+------------------------------------------------------------+