SOYO COMPUTER CO., LTD. 486VESA VER. 4.2 Processor CX486M6/CX486M7/80486SX/80486DX/80486DX280486DX4/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 128MB Onboard DRAM Cache 64/128/256KB BIOS Award Dimensions 254mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J17 Turbo LED J22 Speaker J18 Green PC connector JP4 Reset switch J19 Green PC connector JP6 External battery J20 Green PC connector JP7 Turbo switch J21 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome JP3 Open Monitor type select color JP3 Closed » CMOS memory normal operation JP5 pins 1 & 2 closed CMOS memory clear JP5 pins 2 & 3 closed » Factory configured - do not JP17 pins 1 & 2 alter closed » Factory configured - do not JP27 Closed alter DRAM CONFIGURATION (SETTING 1) Size Bank 0 Bank 1 Bank 2 1MB (4) 256K x 9 NONE NONE 2MB (4) 256K x 9 (4) 256K x 9 NONE 4MB (4) 1M x 9 NONE NONE 5MB (4) 256K x 9 (1) 1M x 36 NONE 6MB (4) 256K x 9 (4) 256K x 9 (1) 1M x 36 8MB (4) 1M x 9 (1) 1M x 36 NONE 12MB (4) 1M x 9 (1) 1M x 36 (1) 1M x 36 16MB (4) 4M x 9 NONE NONE 17MB (4) 256K x 9 (1) 4M x 36 NONE 18MB (4) 256K x 9 (4) 256K x 9 (1) 4M x 36 20MB (4) 1M x 9 (1) 4M x 36 NONE 24MB (4) 1M x 9 (1) 1M x 36 (1) 4M x 36 32MB (4) 4M x 9 (1) 4M x 36 NONE 36MB (4) 1M x 9 (1) 4M x 36 (1) 4M x 36 48MB (4) 4M x 9 (1) 4M x 36 (1) 4M x 36 64MB (4) 16M x 9 NONE NONE 65MB (4) 256K x 9 (1) 16M x 36 NONE 68MB (4) 1M x 9 (1) 16M x 36 NONE 72MB (4) 1M x 9 (1) 1M x 36 (1) 16M x 36 80MB (4) 4M x 9 (1) 16M x 36 NONE 96MB (4) 4M x 9 (1) 4M x 36 (1) 16M x 36 128MB (4) 16M x 9 (1) 16M x 36 NONE DRAM CONFIGURATION (SETTING 2) 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) 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) 1M x 36 (1) 1M x 36 NONE DRAM CONFIGURATION (SETTING 2 CON’T) Size Bank 0 Bank 1 Bank 2 8MB (1) 2M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 12MB (1) 1M x 36 (1) 2M x 36 NONE 16MB (1) 4M x 36 NONE NONE 16MB (1) 2M x 36 (1) 2M x 36 NONE 17MB (1) 256K x 36 (1) 4M x 36 NONE 18MB (1) 256K x 36 (1) 256K x 36 (1) 4M x 36 18MB (1) 512K x 36 (1) 4M x 36 NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (4) 4M x 9 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 (4) 4M x 9 36MB (1) 1M x 36 (1) 8M x 36 NONE 48MB (1) 4M x 36 (1) 4M x 36 (4) 4M x 9 48MB (1) 4M x 36 (1) 8M x 36 NONE 64MB (1) 8M x 36 (1) 8M x 36 NONE 64MB (1) 16M x 36 NONE NONE 65MB (1) 256K x 36 (1) 16M x 36 NONE 68MB (1) 1M x 36 (1) 16M x 36 NONE 72MB (1) 1M x 36 (1) 1M x 36 (4) 16M x 9 80MB (1) 4M x 36 (1) 16M x 36 NONE 96MB (1) 4M x 36 (1) 4M x 36 (4) 16M x 9 128MB (1) 16M x 36 (1) 16M x 36 NONE DRAM JUMPER CONFIGURATION Setting JP35 JP36 JP37 1 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 2 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 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 or (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 16K x 8 or (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP9 JP10 JP13 64KB pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed 128KB pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed 256KB pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 256KB pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed CPU TYPE CONFIGURATION Type JP1 JP2 JP12 JP14 JP15 JP16 CX486 (M6) 1 & 2 2 & 3 1 & 2 2 & 3 Open Open CX486 (M7) 1 & 2 2 & 3 1 & 2 1 & 2, 2 & 3 Open 3 & 4 80486SX 2 & 3 1 & 2 2 & 3 2 & 3 Open Open 80486DX 2 & 3 1 & 2 2 & 3 1 & 2, 2 & 3 Open 3 & 4 80486DX2 2 & 3 1 & 2 2 & 3 1 & 2, 2 & 3 Open 3 & 4 P24D 1 & 2 1 & 2 2 & 3 1 & 2, 2 & 3 Closed 3 & 4 80486DX4 2 & 3 1 & 2 2 & 3 1 & 2, 2 & 3 Open 3 & 4 P24T 2 & 3 1 & 2 2 & 3 1 & 2, 1 & 2 Open 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP18 JP19 JP20 JP21 JP22 JP23 JP111 CX486 2 & 3 2 & 3 Open Open 2 & 3 2 & 3 2 & 3 (M6) CX486 2 & 3 2 & 3 Open Open 2 & 3 2 & 3 2 & 3 (M7) 80486SX 2 & 3 4 & 5 Open 1 & 2 Open Open 3 & 4 80486DX 2 & 3 4 & 5 Open 1 & 2 Open Open 3 & 4 80486DX2 2 & 3 4 & 5 Open 1 & 2 Open Open 3 & 4 P24D 1 & 2 4 & 5 Closed 2 & 3 1 & 2 Open 1 & 2, 3 & 4 80486DX4 2 & 3 Open Open 1 & 2 Open Open 3 & 4 P24T 1 & 2 1 & 2 Open Open 1 & 2 1 & 2 3 & 4 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP29 JP30 JP31 JP34 25MHz Closed Open Closed Closed 33MHz Open Closed Closed Closed 40MHz Closed Open Open Closed 50iMHz Closed Open Closed Closed 50MHz Open Closed Open Closed 66iMHz Open Closed Closed Closed 75iMHz Closed Open Closed Open 100iMHz Open Closed Closed Open CPU VOLTAGE CONFIGURATION Voltage JP24 3.3v pins 1 & 2, 4 & 5 closed 5.0v pins 2 & 3, 5 & 6 closed