EPOX COMPUTER CO., LTD. P55-TXL Processor CX M1/AM K5/Pentium Processor Speed 90/100/120/133/150/166/180/200/225MHz Chip Set Intel Video Chip Set None Maximum Onboard 256MB (EDO supported) Memory Maximum Video None Memory Cache 512KB BIOS Award Dimensions 305mm x 244mm I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connector, ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power ATX Chassis fan power JP1 connector USB connector CN1 Soft off power JP9 supply Serial port 2 CN2 Power LED & JP14/pins 1 – 5 keylock Parallel port CN3 Speaker JP14/pins 7 - 10 PS/2 mouse port CN4 Reset switch JP14/pins 12 & 13 Serial port 1 CN5 Green PC JP14/pins 15 & connector 16 Floppy drive CN6 Green PC LED JP14/pins 18 & interface 19 IDE interface 2 CN7 Turbo LED JP14/pins 21 & 22 IDE interface 1 CN8 IDE interface LED JP14/pins 24 & 25 IR connector J4 32-bit PCI slots PC1 – PC4 USER CONFIGURABLE SETTINGS Function Label Position » Keyboard power on function JP2 Pins 1 & 2 closed enabled Keyboard power on function JP2 Pins 2 & 3 closed disabled » Factory configured - do not JP6 Unidentified alter » CMOS memory normal operation JP8 Pins 1 & 2 closed CMOS memory clear JP8 Pins 2 & 3 closed DIMM/DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 8MB (2) 1M x 36 None None None 8MB None (2) 1M x 36 None None 8MB None None (1) 1M x 64 None 16MB (2) 2M x 36 None None None 16MB None None (1) 2M x 64 None 16MB (2) 1M x 36 (2) 1M x 36 None None 16MB None (2) 1M x 36 None (1) 1M x 64 16MB None None (1) 1M x 64 (1) 1M x 64 24MB None (2) 2M x 36 None (1) 1M x 64 32MB (2) 4M x 36 None None None 32MB None None (1) 4M x 64 None 32MB None (2) 2M x 36 None (1) 2M x 64 40MB (2) 4M x 36 (2) 1M x 36 None None 48MB (2) 4M x 36 (2) 2M x 36 None None 48MB None (2) 4M x 36 None (1) 2M x 64 64MB (2) 8M x 36 None None None 64MB None None None (1) 8M x 64 64MB (2) 4M x 36 (2) 4M x 36 None None 64MB None (2) 4M x 36 None (1) 4M x 64 64MB None None (1) 4M x 64 (1) 4M x 64 DIMM/DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 72MB (2) 8M x 36 (2) 1M x 36 None None 72MB None (2) 8M x 36 None (1) 1M x 64 80MB None (2) 2M x 36 None (1) 8M x 64 80MB (2) 8M x 36 (2) 2M x 36 None None 96MB None (2) 4M x 36 None (1) 8M x 64 96MB (2) 8M x 36 (2) 4M x 36 None None 128MB None (2) 8M x 36 None (1) 8M x 64 128MB (2) 8M x 36 (2) 8M x 36 None None 128MB (2) 16M x 36 None None None 256MB (2) 16M x 36 (2) 16M x 36 None None Note: Board accepts EDO memory. Banks 0 & 1 and 2 & 3 are interchangeable. DIMM VOLTAGE CONFIGURATION Voltage JP7A JP7B » 3.3v Pins 2 & 3 closed Pins 2 & 3 closed 5v Pins 1 & 2 closed Pins 1 & 2 closed CACHE CONFIGURATION Size Bank 0 TAG 512KB (2) 64K x 32 Unidentified CPU SPEED SELECTION (CYRIX) CPU speed Clock speed Multiplier JP4 133MHz 55MHz 2x Pins 21 & 22 closed 150MHz 60MHz 2x Pins 5 & 6 closed 166MHz 66MHz 2x Pins 7 & 8 closed 200MHz 75MHz 2x Pins 19 & 20 closed CPU SPEED SELECTION (AMD) CPU speed Clock speed Multiplier JP4 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 9 & 10 closed 166MHz 66MHz 2.5x Pins 11 & 12 closed 180MHz 60MHz 3x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed 225MHz 75MHz 3.5x Pins 17 & 18 closed CPU SPEED SELECTION (INTEL) CPU speed Clock speed Multiplier JP4 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 9 & 10 closed 166MHz 66MHz 2.5x Pins 11 & 12 closed 180MHz 60MHz 3x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed 225MHz 75MHz 3.5x Pins 17 & 18 closed CPU VOLTAGE SELECTION (SINGLE) Voltage J16 3.3v Pins 1 & 2 closed 3.45v Pins 2 & 3 closed » 3.52v Pins 3 & 4 closed CPU VOLTAGE SELECTION (DUAL) Voltage V core J16 J18 3.3v 2.5v Pins 1 & 2 Pins 1 & 2 closed closed 3.3v 2.8v Pins 1 & 2 Pins 2 & 3 closed closed 3.3v 2.9v Pins 1 & 2 Open closed 3.45v 2.5v Pins 2 & 3 Pins 1 & 2 closed closed 3.45v 2.8v Pins 2 & 3 Pins 2 & 3 closed closed 3.45v 2.9v Pins 2 & 3 Open closed 3.52v 2.5v Pins 3 & 4 Pins 1 & 2 closed closed » 3.52v 2.8v Pins 3 & 4 Pins 2 & 3 closed closed 3.52v 2.9v Pins 3 & 4 Open closed FLASH BIOS VOLTAGE SELECTION Voltage J9 J10 » 5v Pins 2 & 3 closed Pins 2 & 3 closed 12v Pins 1 & 2 closed Pins 1 & 2 closed