INTEL CORPORATION CLASSIC/PCI LPX Processor 80486SX/80486SX2/80486DX2/80486DX4/Pentium Overdrive Processor 25/50(internal)/66(internal)/100(internal)MHz Speed Chip Set Intel Max. Onboard 64MB DRAM Cache 128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit PCI slots on riser card (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse pobt, serial ports (2), VESA feature connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location VGA port CN1 Turbo LED J2 Parallel port CN2 IDE interface LED J3 Serial port 2 CN3 Power LED & keylock J4 Serial port 1 CN4 Reset switch J5 PS/2 mouse port CN5 Chassis fan power J6 IDE interface CN6 Speaker J7 Floppy drive interface CN7 Turbo switch J8 VESA feature connector CN8 Riser Card SL1 Auliliary power J1 connector USER CONFIGURABLE SETTINGS Function Jumper Position » Password enabled J1F3 pins 1 & 2 closed Password disabled J1F3 pins 2 & 3 closed » Monitor type select color J1F4 pins 1 & 2 closed Monitor type select monochrome J1F4 pins 2 & 3 closed » CMOS memory normal operation J1G1 pins 1 & 2 closed CMOS memory clear J1G1 pins 2 & 3 closed » Setup entry enabled J1G2 pins 1 & 2 closed Setup entry disabled J1G2 pins 2 & 3 closed » Flash BIOS write protect enabled J1G3 pins 1 & 2 closed Flash BIOS write protect disabled J1G3 pins 2 & 3 closed » Normal boot enabled J1G4 pins 1 & 2 closed Recovery boot enabled J1G4 pins 2 & 3 closed » Factory configured - do not alter J4A1 Open » Pentium Overdrive cache disabled J4A2 pins 1 & 2 closed Pentium Overdrive cache enabled J4A2 pins 2 & 3 closed » CPU type select SL-enhanced J5A2 pins 1 & 2 closed CPU type select non SL-enhanced J5A2 pins 2 & 3 closed » CPU type select non SX processor J5A3 pins 1 & 2 closed CPU type select SX processor J5A3 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 1MB NONE (1) 256K x 36 1MB (1) 256K x 36 NONE 2MB NONE (1) 512K x 36 2MB (1) 256K x 36 (1) 256K x 36 2MB (1) 512K x 36 NONE 3MB (1) 256K x 36 (1) 512K x 36 3MB (1) 512K x 36 (1) 256K x 36 4MB NONE (1) 1M x 36 4MB (1) 512K x 36 (1) 512K x 36 4MB (1) 1M x 36 NONE 5MB (1) 256K x 36 (1) 1M x 36 5MB (1) 1M x 36 (1) 256K x 36 6MB (1) 512K x 36 (1) 1M x 36 6MB (1) 1M x 36 (1) 512K x 36 8MB NONE (1) 2M x 36 8MB (1) 1M x 36 (1) 1M x 36 8MB (1) 2M x 36 NONE 9MB (1) 256K x 36 (1) 2M x 36 9MB (1) 2M x 36 (1) 256K x 36 10MB (1) 512K x 36 (1) 2M x 36 10MB (1) 2M x 36 (1) 512K x 36 12MB (1) 1M x 36 (1) 2M x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 12MB (1) 2M x 36 (1) 1M x 36 16MB NONE (1) 4M x 36 16MB (1) 2M x 36 (1) 2M x 36 16MB (1) 4M x 36 NONE 17MB (1) 256K x 36 (1) 4M x 36 17MB (1) 4M x 36 (1) 256K x 36 18MB (1) 512K x 36 (1) 4M x 36 18MB (1) 4M x 36 (1) 512K x 36 20MB (1) 1M x 36 (1) 4M x 36 20MB (1) 4M x 36 (1) 1M x 36 24MB (1) 2M x 36 (1) 4M x 36 24MB (1) 4M x 36 (1) 2M x 36 32MB NONE (1) 8M x 36 32MB (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 NONE 33MB (1) 256K x 36 (1) 8M x 36 33MB (1) 8M x 36 (1) 256K x 36 34MB (1) 512K x 36 (1) 8M x 36 34MB (1) 8M x 36 (1) 512K x 36 36MB (1) 1M x 36 (1) 8M x 36 36MB (1) 8M x 36 (1) 1M x 36 40MB (1) 2M x 36 (1) 8M x 36 40MB (1) 8M x 36 (1) 2M x 36 48MB (1) 4M x 36 (1) 8M x 36 48MB (1) 8M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 D1 TAG 128KB (4) 32K x 8 NONE (1) 16K x 1 (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 1 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J5A4 J5A5 128KB pins 2 & 3 closed pins 2 & 3 closed 256KB pins 1 & 2 closed pins 1 & 2 closed CPU VOLTAGE CONFIGURATION Type J1A1 J1A2 J2A2 J2A3 5.0v pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed 3.3v pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed CPU SPEED CONFIGURATION Speed J1F1 J1F2 25MHz pins 2 & 3 closed pins 2 & 3 closed 33MHz pins 1 & 2 closed pins 1 & 2 closed 50iMHz pins 2 & 3 closed pins 2 & 3 closed 66iMHz pins 1 & 2 closed pins 1 & 2 closed 100iMHz pins 2 & 3 closed pins 2 & 3 closed VIDEO MEMORY UPGRADE CONFIGURATION Size Bank 0 2MB (2) 256K x 16 Note: This board has 1MB factory installed. The location is unidentified.