CHICONY, INC. CH-471A Processor CX486S/80486SX/SL80486SX/CX486S2/CX486DX/AM486DXL/80486DX/ SL80486DX/ AM486DXL2/80486DX2/SL80486DX2/P24D/80486DX4/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set SIS Max. 128MB Onboard DRAM Cache 32/64/128/256/512/1024KB BIOS Award Dimensions 254mm x 218mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J3 Speaker J8 Green PC connector J4 External battery JP19 Turbo switch J5 Green PC connector JP38 Turbo LED J6 Green PC connector JP39 Power LED & keylock J7 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » CPU clock down control select JP6 pins 1 & 2 STPCLK closed CPU clock down control select JP6 pins 2 & 3 SMOUT0 closed » CMOS memory normal operation JP7 pins 1 & 2 closed CMOS memory clear JP7 pins 2 & 3 closed » Factory configured - do not JP17 N/A alter CPU type select all CPU types JP22 Open CPU type select CX486S2 only JP22 Closed » Factory configured - do not JP37 N/A alter » Address strobe type select JP40 pins 1 & 2 normal closed Address strobe type select JP40 pins 2 & 3 delayed closed » Factory configured - do not JP45 N/A alter Note: The location of JP40 is unidentified. 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 4MB (1) 256K x (1) 256K x (1) 512K x NONE 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) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB (1) 512K x (1) 1M x 36 NONE NONE 36 8MB (1) 256K x (1) 256K x (1) 512K x (1) 1M x 36 36 36 36 8MB (1) 512K x (1) 512K x (1) 1M x 36 NONE 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 512K x (1) 512K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 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) 256K x (1) 4M x 36 NONE NONE 36 18MB (1) 256K x (1) 256K x (1) 4M x 36 NONE 36 36 18MB (1) 512K x (1) 4M x 36 NONE NONE 36 20MB (1) 512K x (1) 512K x (1) 4M x 36 NONE 36 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 24MB (1) 512K x (1) 512K x (1) 1M x 36 (1) 4M x 36 36 36 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 8M x 36 NONE NONE NONE DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 Bank 2 Bank 3 36MB (1) 512K x (1) 512K x (1) 4M x 36 (1) 4M x 36 36 36 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE 36MB (1) 1M x 36 (1) 8M x 36 NONE 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 (1) 8M x 36 NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 48MB (1) 4M x 36 (1) 8M x 36 NONE 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 (1) 8M x 36 NONE 64MB (1) 16M x 36 NONE NONE NONE 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE 65MB (1) 256K x (1) 16M x 36 NONE NONE 36 68MB (1) 1M x 36 (1) 16M x 36 NONE NONE 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 NONE 72MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 72MB (1) 1M x 36 (1) 1M x 36 (1) 16M x NONE 36 80MB (1) 4M x 36 (1) 16M x 36 NONE NONE 80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 NONE 96MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 NONE 96MB (1) 4M x 36 (1) 4M x 36 (1) 16M x NONE 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 16M x 36 (1) 16M x 36 NONE NONE 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 x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 64K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP4 JP5 JP14 JP16 32KB 1 & 2, 2 & 3 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 3 & 4 64KB 2 & 3, 1 & 2 1 & 2 2 & 3 1 & 2 1 & 2 1 & 2 4 & 5 128KB 1 & 2, 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 2 & 3 3 & 4 256KB 2 & 3, 1 & 2 2 & 3 2 & 3 2 & 3 1 & 2 2 & 3 4 & 5 512KB 1 & 2, 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 3 & 4 1MB 2 & 3, 1 & 2 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 4 & 5 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP10 JP11 JP20 JP21 JP23 CX486S 2 & 3 1 & 2 2 & 3 Open Open 80486SX 1 & 2 2 & 3 2 & 3 Open Open SL80486SX 1 & 2 2 & 3 2 & 3 Open 1 & 2 CX486DX 2 & 3 1 & 2 1 & 2 Closed Open AM486DXL 1 & 2 2 & 3 1 & 2 Closed Open 80486DX 1 & 2 2 & 3 1 & 2 Closed Open SL80486DX 1 & 2 2 & 3 1 & 2 Closed 1 & 2 CX486DX2 2 & 3 1 & 2 1 & 2 Closed Open AM486DXL2 1 & 2 2 & 3 1 & 2 Closed Open SL80486DX2 1 & 2 2 & 3 1 & 2 Closed 1 & 2 P24D 1 & 2 2 & 3 1 & 2 Closed 2 & 3 80486DX4 1 & 2 2 & 3 1 & 2 Closed 1 & 2 P24T 1 & 2 1 & 2 1 & 2 Closed Open Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP24 JP25 JP26 JP27 JP28 CX486S 2 & 3 2 & 3, 4 1 & 2, 3 Open Open & 5 & 4 80486SX Open Open Open Open Open SL80486SX 4 & 5 3 & 4 2 & 3 Open Open CX486DX 2 & 3 2 & 3 1 & 2, 3 Open Open & 4 AM486DXL Open Open Open Open Open 80486DX Open Open Open Open Open SL80486DX 4 & 5 3 & 4 2 & 3 Open Open CX486DX2 2 & 3 2 & 3 1 & 2, 3 Open Open & 4 AM486DXL2 Open Open Open Open Open SL80486DX2 4 & 5 3 & 4 2 & 3 Open Open P24D 4 & 5 1 & 2, 3 2 & 3 Closed Closed & 4 80486DX4 4 & 5 3 & 4 2 & 3 Open Open P24T 1 & 2 3 & 4 2 & 3 Open Open Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP29 JP30 JP31 JP33 JP36 CX486S 2 & 3 2 & 3 Open 2 & 3 1 & 2 80486SX 2 & 3 Open Open Open Open SL80486SX 2 & 3 Open Open Open 1 & 2 CX486DX 2 & 3 2 & 3 3 & 4 2 & 3 1 & 2 AM486DXL 2 & 3 3 & 4 1 & 2 Open 2 & 3 80486DX 2 & 3 Open 3 & 4 Open Open SL80486DX 2 & 3 Open 3 & 4 Open 1 & 2 CX486DX2 2 & 3 2 & 3 3 & 4 2 & 3 1 & 2 AM486DXL2 2 & 3 3 & 4 1 & 2 Open 2 & 3 SL80486DX2 2 & 3 Open 3 & 4 Open 1 & 2 P24D 1 & 2 Open 3 & 4 Open 1 & 2 80486DX4 2 & 3 Open 3 & 4 Open 1 & 2 P24T 1 & 2 1 & 2 2 & 3 1 & 2 1 & 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP8 JP12 JP13 20MHz Open Open Open 25MHz Open Open Closed 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Open Closed 50MHz Closed Open Open 66iMHz Closed Closed Closed 75iMHz Open Open Closed 100iMHz Closed Closed Closed CPU VOLTAGE CONFIGURATION Voltage JP32 JP34 JP35 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 JP44 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP47 <= 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed