CHICONY, INC. CK-491K Processor CX486S/80486SX/80487SX/CX486DX/80486DX/CX486DX2/80486DX2/ 80486DX4/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 64MB Onboard DRAM Cache 32/64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O 32-bit VESA local bus slots (3) Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J3 Speaker J7 Reset switch J4 Power LED & keylock J8 Turbo switch J5 32-bit VESA local bus SL1 - SL3 slots Turbo LED J6 USER CONFIGURABLE SETTINGS Function Jumper Position » Battery type select internal J3 pins 2 & 3 closed Battery type select external J3 Closed » CMOS memory normal operation JP1 Open CMOS memory clear JP1 Closed » Address strobe delay disabled JP7 pins 1 & 2 closed Address strobe delay enabled JP7 pins 2 & 3 closed » VESA card type select normal JP19 pins 1 & 2 closed VESA card type select Weitek JP19 pins 2 & 3 Power 9000 only closed » Cyrix C6 not installed JP20 Open Cyrix C6 installed JP20 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 (1) 512K x NONE NONE NONE 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 512K x (1) 1M x 36 NONE NONE 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 7MB (1) 256K x (1) 512K x (1) 1M x 36 NONE 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 9MB (1) 2M x 36 (1) 256K x NONE NONE 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 18MB (1) 4M x 36 (1) 512K x NONE NONE 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 8M x 36 NONE NONE NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 33MB (1) 8M x 36 (1) 256K x NONE NONE 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 34MB (1) 8M x 36 (1) 512K x NONE NONE 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 36MB (1) 8M x 36 (1) 1M x 36 NONE NONE 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M 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) 8M x 36 (1) 8M x 36 NONE NONE 64MB (1) 16M x NONE NONE NONE 36 DRAM JUMPER CONFIGURATION Size JP21 JP22 Double sided SIMM pins 1 & 2 closed pins 1 & 2 closed 16MB x 36 SIMM pins 2 & 3 closed pins 2 & 3 closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 32KB (4) 8K x 8 NONE (1) 8K x 8 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K or (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP2 JP3 JP4 JP5 JP6 32KB 2 & 3 2 & 3 Open Open Open 64KB 1 & 2 1 & 2 Open Open Closed 128KB 2 & 3 2 & 3 Open Closed Closed 256KB 1 & 2 1 & 2 Closed Closed Closed Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP15 JP16 JP17 CX486S pins 2 & 3 Open Open closed 80486SX pins 2 & 3 Open Open closed 80487SX pins 1 & 2, 3 & pins 2 & 3 Open 4 closed closed CX486DX pins 1 & 2, 3 & pins 1 & 2 Open 4 closed closed 80486DX pins 1 & 2, 3 & pins 1 & 2 Open 4 closed closed CX486DX2 pins 1 & 2, 3 & pins 1 & 2 Closed 4 closed closed 80486DX2 pins 1 & 2, 3 & pins 1 & 2 Open 4 closed closed 80486DX4 pins 1 & 2, 3 & pins 1 & 2 Open 4 closed closed Pentium Overdrive pins 1 & 2, 3 & pins 1 & 2 Open 4 closed closed CPU SPEED CONFIGURATION Speed JP8 JP9 JP10 20MHz pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 25MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed 33MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed 40MHz pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed 50iMHz pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed 50MHz pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed 66iMHz pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed 75iMHz pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed 100iMHz pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed CPU SPEED CONFIGURATION (80486DX4 ONLY) Speed JP18 2x pins 2 & 3 closed 2.5x pins 1 & 2 closed 3x Open CPU VOLTAGE CONFIGURATION Voltage P1 P2 P3 3.3v pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed 5v pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed VESA WAIT STATE CONFIGURATION Wait states JP13 1 wait state Closed 2 wait states Open BUS SPEED CONFIGURATION CPU speed JP14 <= 33MHz Open > 33MHz Closed