ADVANCED INTEGRATION RESEARCH, INC. 486MIS REV. 1.11 Processor 80486SX/80487SX/80486DX/80486DX2/ODP486SX/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)MHz Speed Chip Set SIS Max. Onboard 64MB DRAM Cache 64/128/256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location 32-bit VESA Local J1 & J2 Turbo switch S6 bus slots Turbo LED S1 IDE interface S10 Reset switch S2 Floppy drive interface S11 Hard drive LED S3 Parallel port S12 Speaker S4 Serial port 1 S13 Power LED & keylock S5 Serial port 2 S14 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter JP6 Closed » Monitor type select monochrome, JP16 Open VGA or EGA Monitor type select CGA JP16 Closed » IDE interface enabled JP17 Open IDE interface disabled JP17 Closed » Factory configured - do not alter JP18 Closed » Parallel port select interrupt JP22 pins 1 & 2 IRQ7 closed Parallel port select interrupt JP22 pins 2 & 3 IRQ5 closed » Factory configured - do not alter JP27 Closed » Flash BIOS write protect disabled JP28 pins 1 & 2 closed Flash BIOS write protect enabled JP28 pins 2 & 3 closed » Factory configured - do not alter JP31 Closed » Normal password operation JP32 Open BIOS password clear JP32 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 2MB (1) 512K x 36 None None 4MB (1) 512K x 36 None (1) 512K x 36 4MB (1) 1M x 36 None None 6MB (1) 512K x 36 None (1) 1M x 36 8MB (1) 1M x 36 (1) 1M x 36 None 8MB (1) 2M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 12MB (1) 2M x 36 None (1) 1M x 36 16MB (1) 2M x 36 None (1) 2M x 36 16MB (1) 4M x 36 None None 20MB (1) 1M x 36 (1) 4M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 24MB (1) 2M x 36 None (1) 4M x 36 32MB (1) 4M x 36 (1) 4M x 36 None 40MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 40MB (1) 2M x 36 None (1) 8M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 8M x 36 None (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 64MB (1) 8M x 36 None (1) 8M x 36 CACHE SIZE JUMPER CONFIGURATION Size JP7 JP8 JP9 JP10 JP11 JP12 JP13 JP14 JP15 64KB 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 2 & 3 2 2 2 2 2 2 2 2 128KB 1 & 1 & 2 & 2 & 2 & 1 & 1 & 1 & 1 & 2 2 2 3 3 3 2 2 2 256KB 2 & 1 & 2 & 2 & 2 & 2 & 2 & 1 & 2 & 3 3 2 3 3 3 3 3 2 256KB 2 & 2 & 2 & 2 & 2 & 1 & 2 & 2 & 1 & 2 3 3 3 3 3 2 3 3 Note:Pins designated should be in the closed position. CACHE SIZE AND SRAM LOCATIONS Cache Size Bank 0 Bank 1 TAG Dirty Bit 64KB (4) 8K x 8 (4 ) 8K x 8 (1) 8K x (1) 16K x 8 1 128KB (4) 32K x 8 None (1) 32K (1) 16K x x 8 1 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K (1) 16K x x 8 1 512KB (4) 128K x 8 None (1) 32K (1) 16K x x 8 4 CPU EXTERNALCLOCK SPEED Speed JP3 JP4 JP5 20MHz Open Closed Closed 25MHz Closed Open Closed 33MHz Closed Closed Open 40MHz Open Open Closed 50i MHz Closed Open Closed 50MHz Open Closed Open 66i MHz Closed Closed Open CPU TYPE Type JP1 JP2 80486SX Open pins 2 & 3 closed 80487SX pins 2 & 3 closed pins 1 & 2 and 3 & 4 closed 80486DX pins 1 & 2 closed pins 1 & 2 and 3 & 4 closed ODP486SX pins 2 & 3 closed pins 1 & 2 and 3 & 4 closed 80486DX2 pins 1 & 2 closed pins 1 & 2 and 3 & 4 closed Pentium Overdrive pins 1 & 2 closed pins 1 & 2 and 3 & 4 closed IDE RECOVERY TIME Time JP29 JP30 » 300ns Closed Closed 240ns Open Closed 180ns Closed Open 120ns Open Open SCSI ADDRESS Address W1/pins 3 & 4 W1/pins 5 & 6 DC000h enabled Closed Closed DC000h disabled Closed N/A DC8000h enabled N/A Closed DC8000h disabled Closed Closed SCSI PORT CONFIGURATION Setting IRQ W1/1 & 2 W1/7 & 8 W1/9 & 10 » Enabled 11 Closed Closed Open Disabled 10 Open Open Closed