UNIDENTIFIED SIS 486-471 VL BUS 5/3.3V Processor CX486S/80486SX/CX486DX/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set SIS Max. Onboard128MB DRAM Cache 64/128/256/512KB BIOS AMI Dimensions 254mm x 220mm I/O Options 32-bit VESA local bus slots (3), green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Reset switch J6 Green PC connector J2 Power LED & keylock J7 Turbo switch J3 Break switch JP26 connector Turbo LED J4 32-bit VESA local bus SL1 - SL3 slots Speaker J5 USER CONFIGURABLE SETTINGS Function Jumper Position » Turbo switch enabled J3 pins 1 & 2 closed Turbo switch disabled J3 pins 2 & 3 closed Use for break switch J3 pins 4 & 5 closed » CMOS memory normal operation JP16 pins 1 & 2 closed CMOS memory clear JP16 pins 2 & 3 closed » Monitor type select JP17 Open VGA/EGA/monochrome Monitor type select CGA JP17 Closed » CX486S2 CPU not installed JP18 Open CX486S2 CPU installed JP18 Closed » RC pin for break switch JP19 pins 1 & 2 closed RC pin for RC JP19 pins 2 & 3 closed » Factory configured - do not alter JP20 pins 2 & 3 closed » Factory configured - do not alter JP23 pins 1 & 2 closed » J3 set with pins open JP27 Closed J3 set with pins 4 & 5 closed JP27 Open » Factory configured - do not alter JP43 pins 1 & 2 closed DRAM CONFIGURATION (TABLE 1) Size Bank 0 Bank 1 Bank 2 1MB (4) 256K x 9 NONE NONE 2MB (4) 256K x 9 (1) 256K x 36 NONE 4MB (4) 1M x 9 NONE NONE 5MB (4) 256K x 9 (1) 1M x 36 NONE 6MB (4) 256K x 9 (1) 256K x 36 (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 (1) 256K x 36 (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 34MB (4) 256K x 9 (1) 256K x 36 (1) 8M x 36 36MB (4) 1M x 9 (1) 4M x 36 (1) 4M x 36 48MB (4) 4M x 9 (1) 8M x 36 NONE 48MB (4) 4M x 9 (1) 8M x 36 NONE 52MB (4) 1M x 9 (1) 4M x 36 (1) 8M x 36 64MB (4) 4M x 9 (1) 4M x 36 (1) 8M x 36 64MB (4) 16M x 9 NONE NONE 68MB (4) 1M x 9 (1) 8M x 36 (1) 8M x 36 80MB (4) 4M x 9 (1) 8M x 36 (1) 8M x 36 96MB (4) 16M x 9 (1) 8M x 36 NONE 128MB (4) 16M x 9 (1) 8M x 36 (1) 8M x 36 DRAM CONFIGURATION (TABLE 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 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 (4) 1M x 9 8MB (1) 2M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (4) 1M x 9 16MB (1) 2M x 36 (1) 2M x 36 NONE 16MB (1) 4M x 36 NONE NONE 17MB (1) 256K x 36 (1) 4M x 36 NONE 18MB (1) 256K x 36 (1) 256K x 36 (4) 4M x 9 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 72MB (1) 1M x 36 (1) 1M x 36 (4) 16M x 9 96MB (1) 4M x 36 (1) 4M x 36 (4) 16M x 9 128MB (1) 8M x 36 (1) 8M x 36 (4) 16M x 9 DRAM JUMPER CONFIGURATION Configuration JP36 JP37 Table 1 pins 1 & 2 closed pins 2 & 3 closed Table 2 pins 2 & 3 closed pins 1 & 2 closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 4K 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 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP4 JP33 JP34 JP35 64KB 2 & 3 1 & 2 2 & 1 & 2 1 & 2 1 & 2 Open 3, 4 & 5 128KB 1 & 2 1 & 2 1 & 1 & 2 2 & 3 2 & 3 Open 2, 3 & 4 256KB 2 & 3 Open 2 & Open 2 & 3 2 & 3 Closed 3, 4 & 5 256KB 2 & 3 2 & 3 2 & 1 & 2 2 & 3 2 & 3 Open 3, 4 & 5 512KB 1 & 2 2 & 3 1 & 2 & 3 2 & 3 2 & 3 Open 2, 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP30 JP31 P24D Closed Closed All other CPU Open Open CPU TYPE CONFIGURATION Type JP8 JP9 JP10 JP11 JP12 CX486SX 2 & 3 Closed 2 & 3 Open 2 & 3, 4 & 5 80486SX 2 & 3 Open 2 & 3 Open Open SLE486SX 2 & 3 Open 2 & 3 Open 3 & 4 CX486DX 1 & 2 Closed 2 & 3 3 & 4 2 & 3 SLE486DX 1 & 2 Closed 2 & 3 3 & 4 3 & 4 80486DX 1 & 2 Closed 2 & 3 3 & 4 Open SLE486DX2 1 & 2 Closed 2 & 3 3 & 4 3 & 4 80486DX4 1 & 2 Closed 2 & 3 3 & 4 3 & 4 P24D 1 & 2 Closed 1 & 2 3 & 4 1 & 2, 3 & 4 P24T 1 & 2 Closed 1 & 2 2 & 3 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP13 JP14 JP15 JP21 JP22 CX486SX Open 1 & 2, 3 2 & 3 1 & 2 2 & 3 & 4 80486SX Open Open Open 2 & 3 1 & 2 SLE486SX 1 & 2 2 & 3 4 & 5 2 & 3 1 & 2 CX486DX Open 1 & 2, 3 2 & 3 1 & 2 2 & 3 & 4 SLE486DX 1 & 2 2 & 3 4 & 5 2 & 3 1 & 2 80486DX Open Open Open 2 & 3 1 & 2 SLE486DX2 1 & 2 2 & 3 4 & 5 2 & 3 1 & 2 80486DX4 1 & 2 2 & 3 4 & 5 2 & 3 1 & 2 P24D 2 & 3 2 & 3 4 & 5 2 & 3 1 & 2 P24T Open 2 & 3 1 & 2 1 & 2 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP24 JP25 JP32 JP41 JP42 CX486SX 2 & 3 2 & 3 2 & 3 2 & 3, 5 Closed & 6 80486SX Open Open 1 & 2 2 & 3, 5 Closed & 6 SLE486SX Open Open 2 & 3 2 & 3, 5 Closed & 6 CX486DX 2 & 3 2 & 3 2 & 3 2 & 3, 5 Closed & 6 SLE486DX Open Open 2 & 3 2 & 3, 5 Closed & 6 80486DX Open Open 1 & 2 2 & 3, 5 Closed & 6 SLE486DX2 Open Open 2 & 3 2 & 3, 5 Closed & 6 80486DX4 Open Open 2 & 3 1 & 2, 4 Open & 5 P24D Open 1 & 2 2 & 3 2 & 3, 5 Closed & 6 P24T 1 & 2 1 & 2 2 & 3 2 & 3, 5 Closed & 6 Note: Pins designated should be in the closed position. CPU VOLTAGE CONFIGURATION Voltage JP41 3.3v pins 1 & 2, 4 & 5 closed 5.0v (DX4) pins 2 & 3, 5 & 6 closed Note: If Q4, Q5, and Q6 are installed or Q6 only installed, set JP41 with pins 1 & 2, 4 & 5 closed. CPU SPEED CONFIGURATION (U16-AVASEM/AV9107-03/KTS0147C) Speed JP5 JP6 JP7 20MHz Closed Open Closed 25MHz Closed Closed Open 33MHz Open Closed Closed 40MHz Closed Open Open 50iMHz Closed Closed Open 50MHz Open Open Closed 66iMHz Open Closed Closed CPU SPEED CONFIGURATION (U17-MX8315) Speed JP5 JP6 JP7 20MHz Open Open Open 25MHz Open Closed Open 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Closed Open 50MHz Closed Open Open 66iMHz Closed Closed Closed VESA WAIT STATE CONFIGURATION Wait states JP28 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP29 <= 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed