FREE COMPUTER TECHNOLOGY, INC. 486F38X Processor CX486S/80486SX/80486SX2/80487SX/CX486DX/80486DX/CX486DX2/ 80486DX2/80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set SIS 471 Max. 64MB Onboard DRAM Cache 128/256/512KB BIOS Award Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (3), green PC connector, 8 slots (all 16-bit) NPU Options None CONNECTIONS Purpose Location Purpose Location Turbo switch J1 Break switch J6 Turbo LED J2 External battery J7 Reset switch J3 Green PC connector JP2 Power LED & keylock J4 Green PC connector JP3 Speaker J5 32-bit VESA Local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP4 pins 2 & 3 closed CMOS memory clear JP4 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 2MB NONE (1) 512K x NONE NONE 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB NONE (1) 512K x (1) 1M x 36 NONE 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB NONE (1) 2M x 36 NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 10MB (1) 256K x (1) 256K x NONE (1) 2M x 36 36 36 10MB NONE (1) 512K x (1) 1M x 36 (1) 1M x 36 36 10MB NONE (1) 512K x NONE (1) 2M x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 12MB NONE (1) 2M x 36 (1) 1M x 36 NONE 16MB NONE (1) 2M x 36 NONE (1) 2M x 36 16MB NONE (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 NONE (1) 2M x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB NONE (1) 512K x (1) 4M x 36 NONE 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 24MB NONE (1) 2M x 36 (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB NONE (1) 8M x 36 NONE NONE 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 40MB (1) 1M x 36 (1) 1M x 36 NONE (1) 8M x 36 40MB NONE (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 40MB NONE (1) 2M x 36 NONE (1) 8M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 NONE (1) 8M x 36 64MB NONE (1) 8M x 36 NONE (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 8 or (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 16K x 8 or (1) 32K x 8 512KB (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP12 JP21 128KB pins 1 & 2 closed Open 256KB pins 2 & 3 closed Open 256KB pins 1 & 2, 3 & 4 Open closed 512KB pins 2 & 3, 4 & 5 Closed closed 512KB pins 1 & 2, 3 & 4 Closed closed CPU TYPE CONFIGURATION Type JP6 JP7 CX486S 1 & 2, 3 & 4 2 & 3, 4 & 5, 7 & 8, 9 & 10 80486SX/SX2 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 CX486DX 1 & 2, 3 & 4 2 & 3, 4 & 5, 7 & 8, 9 & 10 CX486DX2 1 & 2, 3 & 4 2 & 3, 4 & 5, 7 & 8, 9 & 10 80486DX/DX2 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 80486DX4 (2x) 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 80486DX4 (2.5x) 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 80486DX4 (3x) 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 Overdrive 2 & 3, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 Pentium Overdrive 1 & 2, 4 & 5 1 & 2, 3 & 4, 6 & 7, 8 & 9 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP11 JP14 JP15 CX486S Open 2 & 3, 5 & 6 3 & 4 80486SX/SX2 Open 2 & 3, 4 & 5, 3 & 4 6 & 7 CX486DX Open 3 & 4 1 & 2, 5 & 6 CX486DX2 Open 1 & 2, 5 & 6 1 & 2, 3 & 4 80486DX/DX2 Open 1 & 2, 4 & 5, 3 & 4 6 & 7 80486DX4 (2x) 2 & 3 1 & 2, 4 & 5, 3 & 4 6 & 7 80486DX4 (2.5x) 1 & 2 1 & 2, 4 & 5, 3 & 4 6 & 7 80486DX4 (3x) Open 1 & 2, 4 & 5, 3 & 4 6 & 7 Overdrive Open 1 & 2, 4 & 5, 3 & 4 6 & 7 Pentium Overdrive Open 1 & 2, 4 & 5, 4 & 5 6 & 7 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP17 JP19 JP20 25MHz Closed Open Closed 33MHz Closed Closed Open 40MHz Open Open Closed 50iMHz Closed Open Closed 50MHz Open Closed Open 66iMHz Closed Closed Open BUS SPEED CONFIGURATION Speed JP24 <= 33MHz Open > 33MHz Closed