ADVANCED INTEGRATED RESEARCH, INC. 486SH REV. 1.1 Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 20/25/33/40/50(Internal)/50/66(Internal)MHz Chip Set SIS Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (3) [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Turbo switch J5 Power LED & keylock J2 Turbo LED J6 Speaker J3 32-bit VESA Local S1, S2, & S3 bus slots Reset switch J4 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome, JP7 Open VGA or EGA Monitor type select CGA JP7 Closed » CMOS memory normal operation JP10 pins 1 & 2 closed CMOS memory clear JP10 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x9 NONE 8MB (4) 1M x9 (4) 1M x9 16MB (4) 4M x 9 NONE 20MB (4) 1M x9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG/U36 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP20 JP21 64KB pins 1 & pins 2 & pins 1 & pins 1 & pins 1 & 2 2 3 2 2 128KB pins 1 & pins 1 & pins 2 & pins 1 & pins 2 & 3 2 2 3 2 256KB pins 2 & pins 2 & pins 2 & pins 2 & pins 2 & 3 3 3 3 3 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP15 JP16 JP18 JP19 486SX (PGA) pins 2 & 3 Open Open Closed closed 80486SX (PQFP) pins 2 & 3 Open Open Open closed 80487SX pins 1 & 2 pins 2 & 3 Closed Closed closed closed 80486DX pins 1 & 2 pins 1 & 2 Closed Closed closed closed ODP486SX pins 1 & 2 pins 2 & 3 Closed Closed closed closed 80486DX2 pins 1 & 2 pins 1 & 2 Closed Closed closed closed Pentium pins 1 & 2 pins 1 & 2 Closed Closed Overdrive closed closed CPU SPEED CONFIGURATION Speed JP5 JP11 JP12 JP14 20MHz Open Open Closed pins 1 & 2 closed 25MHz Closed Closed Open pins 1 & 2 closed 33MHz Closed Open Open pins 1 & 2 closed 40MHz Open Closed Open pins 2 & 3 closed 50i MHz Closed Closed Open pins 1 & 2 closed 50MHz Open Open Open pins 2 & 3 closed 66i MHz Closed Open Open pins 1 & 2 closed