INFOMATIC POWER SYSTEMS CORPORATION OPTI-495SX 3/486WB CACHE Processor 80386DX/80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM 32MB Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slot (Non-functional) NPU Options 80387 [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Reset switch J5 Speaker J2 External battery JP18 Turbo switch J3 32-bit VESA card S1 Turbo LED J4 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP8 unknown alter » Factory configured - do not JP9 unknown alter » Factory configured - do not JP10 unknown alter » Factory configured - do not JP11 unknown alter » Monitor type select color JP17 closed Monitor type select monochrome JP17 open » CMOS memory normal operation JP18 pins 2 & 3 closed CMOS memory clear JP18 pins 3 & 4 closed External battery select JP18 connected » Factory configured - do not JP23 open alter CACHE JUMPER CONFIGURATION Size JP6 JP7 JP12 JP13 64KB open open open pins 2 & 3 closed 128KB open closed closed pins 1 & 2 closed 256KB closed closed closed pins 2 & 3 closed CACHE CONFIGURATION Size Cache Location TAG 64KB (8) 8K x 8 Banks 0 & 1 (1) 8K x 8 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8 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 x 9 NONE 5MB (4) 256K x 9 (4) 1 x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CPU MODE CONFIGURATION Mode JP3 JP5 JP20 JP21 JP24 486 (PQFP) pins 1 & pins 2 & open N/A pins 2 & 2 3 3 486 (PGA) pins 1 & pins 2 & closed closed pins 2 & 2 3 3 386 (PQFP) pins 2 & pins 1 & N/A open pins 1 & 3 2 2 CPU TYPE CONFIGURATION (PQFP) Type JP14 JP22 JP51 JP52 80486SX-33MHz pins 1 & 2 N/A open closed closed 80486SX-25MHz pins 1 & 2 N/A closed open closed 80386DX-40MHz pins 2 & 3 open open open closed 80386DX-33MHz pins 2 & 3 closed open closed closed CPU TYPE CONFIGURATION (PGA) Type JP1 JP2 JP4 JP14 JP51 JP52 80486DX2-66MHz closed pins pins pins open closed 1 & 2 1 & 2 1 & 2 80486DX2-50MHz closed pins pins pins closed open 1 & 2 1 & 2 1 & 2 ODP486SX-33MHz closed pins pins pins open closed 1 & 2 2 & 3 1 & 2 ODP486SX-25MHz closed pins pins pins closed open 1 & 2 2 & 3 1 & 2 80486DX-50MHz closed pins pins pins closed open 1 & 2 1 & 2 2 & 3 80486DX-33MHz closed pins pins pins open closed 1 & 2 1 & 2 1 & 2 80486DX-25MHz closed pins pins pins closed open 1 & 2 1 & 2 1 & 2 80487SX-33MHz closed pins pins pins open closed 1 & 2 2 & 3 1 & 2 80487SX-25MHz closed pins pins pins closed open 1 & 2 2 & 3 1 & 2 80486SX-33MHz open pins open pins open closed 2 & 3 1 & 2 80486SX-25MHz open pins open pins closed open 2 & 3 1 & 2