ABIT COMPUTER CORPORATION PV4/PV4T (REV. 1.1) Processor 80486SX/SL80486SX/U5S/CX486DX/AM486DX/80486DX/SL80486DX/ AM486DX2/AM486DX2V8T/CX486DX2/CX486DX2V/SL80486DX2/AM486DX4/ 80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 128MB Onboard DRAM Cache 128/256/512KB BIOS Award Dimensions 254mm x 218mm I/O 32-bit PCI slots (2), floppy drive interface, game port, green PC connector, Options IDE interfaces (2), parallel port, serial ports (2), VGA feature connector, VGA port NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location IDE interface (primary) CN1 Green PC connector JP39 IDE interface CN2 Power LED & keylock JW1 (secondary) Floppy drive interface CN3 Speaker JW2 Parallel port CN4 Turbo LED JW3 Serial port 1 J3 Turbo switch JW4 Serial port 2 J4 Reset switch JW5 Game interface J5 IDE interface LED JW6 External battery J6 IDE interface LED JW7 VGA interface J9 32-bit PCI slots PC1 & PC2 VGA feature connector J10 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter J12 N/A » Factory configured - do not alter JP5 N/A » Factory configured - do not alter JP6 N/A » Factory configured - do not alter JP36 N/A » Factory configured - do not alter JP42 pins 2 & 3 closed » Factory configured - do not alter JP43 pins 1 & 2 closed » On board VGA enabled JP69 pins 2 & 3 closed On board VGA disabled JP69 pins 1 & 2 closed » Factory configured - do not alter JP70 Open » Factory configured - do not alter JP84 Open » Factory configured - do not alter RN18 N/A » Factory configured - do not alter RN19 N/A » Factory configured - do not alter RN20 N/A » Factory configured - do not alter RN21 N/A DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB (1) 256K x 36 NONE NONE 2MB (1) 256K x 36 (1) 256K x 36 NONE 2MB (1) 512K x 36 NONE NONE 4MB (1) 256K x 36 (1) 256K x 36 (1) 512K x 36 4MB (1) 512K x 36 (1) 512K x 36 NONE 4MB (1) 1M x 36 NONE NONE 5MB (1) 256K x 36 (1) 1M x 36 NONE 6MB (1) 256K x 36 (1) 256K x 36 (1) 1M x 36 6MB (1) 512K x 36 (1) 1M x 36 NONE 8MB (1) 512K x 36 (1) 512K x 36 (1) 1M x 36 8MB (1) 1M x 36 (1) 1M x 36 NONE 8MB (1) 2M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 16MB (1) 4M x 36 NONE NONE 17MB (1) 256K x 36 (1) 4M x 36 NONE 18MB (1) 256K x 36 (1) 256K x 36 (1) 4M x 36 20MB (1) 512K x 36 (1) 512K x 36 (1) 4M x 36 20MB (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE 32MB (1) 8M x 36 NONE NONE 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 36MB (1) 1M x 36 (1) 8M x 36 NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 8M x 36 NONE 64MB (1) 16M x 36 NONE NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 64MB (1) 8M x 36 (1) 8M x 36 NONE 65MB (1) 256K x 36 (1) 16M x 36 NONE 68MB (1) 1M x 36 (1) 16M x 36 NONE 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 72MB (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 80MB (1) 4M x 36 (1) 16M x 36 NONE 80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 96MB (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 16M x 36 (1) 16M x 36 NONE CACHE CONFIGURATION Size Bank 0 TAG 128KB (4) 32K x 8 (1) 32K x 8 256KB (4) 64K x 8 (1) 32K x 8 512KB (4) 128K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP20 128KB pins 1 & 2, 4 & 5 closed 256KB pins 2 & 3, 4 & 5 closed 512KB pins 2 & 3, 5 & 6 closed CPU TYPE CONFIGURATION Type JP7 JP10 JP11 JP37 80486SX Open Open 1 & 3, 2 & 1 & 2 4 SL80486SX Open Open 1 & 3, 2 & Open 4 U5S Open Open 1 & 3, 2 & 1 & 2 4 CX486DX Open Open 1 & 3, 2 & Open 4 AM486DX Open Open 1 & 3, 2 & 1 & 2 4 80486DX Open Open 1 & 3, 2 & 1 & 2 4 SL80486DX Open Open 1 & 3, 2 & Open 4 AM486DX2 Open Open 1 & 3, 2 & 1 & 2 4 AM486DX2V8T Closed Open 3 & 4, 5 & 1 & 2 6 CX486DX2 Open Open 1 & 3, 2 & Open 4 CX486DX2V Open Open 3 & 4, 5 & Open 6 SL80486DX2 Open Open 1 & 3, 2 & Open 4 AM486DX4 Open Open 3 & 5, 4 & 1 & 2 6 80486DX4 Open Open 3 & 5, 4 & Open 6 Pentium Overdrive Open Open 1 & 3, 2 & Open 4 Note: Pins designated should be in the closed position. The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard. CPU TYPE CONFIGURATION (CON’T) Type RN1 RN2 RN3 RN4 80486SX Not installed Not installed Not installed pins 9 - 16 closed SL80486SX Not installed Not installed Not installed pins 9 - 16 closed U5S Not installed Not installed Not installed pins 9 - 16 closed CX486DX Not installed pins 1 - 8 closed Not installed pins 1 - 8 closed AM486DX Not installed Not installed Not installed pins 5 - 12 closed 80486DX Not installed Not installed Not installed pins 5 - 12 closed SL80486DX Not installed Not installed Not installed pins 5 - 12 closed AM486DX2 Not installed Not installed Not installed pins 5 - 12 closed AM486DX2V8T Not installed Not installed Not installed pins 5 - 12 closed CX486DX2 Not installed pins 1 - 8 closed Not installed pins 1 - 8 closed CX486DX2V Not installed pins 1 - 8 closed Not installed pins 1 - 8 closed SL80486DX2 Not installed Not installed Not installed pins 5 - 12 closed AM486DX4 Not installed Not installed Not installed pins 5 - 12 closed 80486DX4 Not installed Not installed Not installed pins 5 - 12 closed Pentium Overdrive Not installed Not installed Not installed Not installed Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard. CPU TYPE CONFIGURATION (CON’T) Type RN5 RN6 RN7 80486SX Not installed Not installed pins 1 - 8 closed SL80486SX Not installed Not installed pins 1 - 8 closed U5S Not installed Not installed pins 1 - 8 closed CX486DX Not installed pins 1 - 8 Not installed closed AM486DX Not installed pins 1 - 8 pins 1 - 8 closed closed 80486DX Not installed pins 1 - 8 pins 1 - 8 closed closed SL80486DX Not installed pins 1 - 8 pins 1 - 8 closed closed AM486DX2 Not installed pins 1 - 8 pins 1 - 8 closed closed AM486DX2V8T Not installed pins 1 - 8 pins 1 - 8 closed closed CX486DX2 Not installed pins 1 - 8 Not installed closed CX486DX2V Not installed pins 1 - 8 Not installed closed SL80486DX2 Not installed pins 1 - 8 pins 1 - 8 closed closed AM486DX4 Not installed pins 1 - 8 pins 1 - 8 closed closed 80486DX4 Not installed pins 1 - 8 pins 1 - 8 closed closed Pentium pins 7 & 16 pins 2 & 3 pins 1 & 2 Overdrive closed closed closed Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard. CPU SPEED CONFIGURATION Speed JP32 JP33 JP34 JP35 25MHz pins 1 & 2 closed Open Open Closed 33MHz pins 1 & 2 closed Closed Closed Closed 40MHz pins 1 & 2 closed Open Closed Closed 50iMHz pins 1 & 2 closed Open Open Closed 66iMHz pins 1 & 2 closed Closed Closed Closed 75iMHz pins 1 & 2 closed Open Open Closed 80iMHz pins 1 & 2 closed Open Closed Closed 100iMHz pins 1 & 2 closed Closed Closed Closed CPU VOLTAGE CONFIGURATION Voltage JP1 JP2 JP3 JP4 3.3v Closed Open Open Open 3.45v Open Closed Open Open 3.6v Open Open Closed Open 4.04v Open Open Open Closed CMOS CONFIGURATION Setting JP60 JP80 CMOS memory normal operation pins 1 & 2 closed pins 1 & 2 closed CMOS memory clear pins 2 & 3 closed pins 2 & 3 closed