DATAEXPERT CORPORATION OPTI-495WB Ver 2.0 Processor 80486SX/80486DX/ODP486SX Processor Speed 20/25/33/50MHz Chip Set OPTI Max. Onboard DRAM 32MB Cache 64/128/256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Turbo switch J4 Speaker J2 Turbo LED J5 Reset switch J3 External battery J6 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J6 pins 2 & 3 closed CMOS memory clear J6 pins 3 & 4 closed » CPU speed select 20/25/33MHz JP9 pins 2 & 3 closed CPU speed select 50MHz JP9 pins 1 & 2 closed » Monitor type select color JP10 Closed Monitor type select monochrome JP10 Open 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) 1M 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 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 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) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP4 JP5 JP6 JP7 JP13 JP15 JP16 JP17 JP18 64KB 2 & Open Open Open Open 1 & 1 & 2 & 2 & 3 2 2 3 3 128KB 1 & Open Open Closed Closed 2 & 1 & 1 & 2 & 2 3 2 2 3 256KB 2 & Closed Open Closed Closed 1 & 2 & 1 & 2 & 3 2 3 2 3 512KB 1 & Closed Closed Closed Closed 2 & 2 & 1 & 2 & 2 3 3 2 3 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP1 JP2 JP3 80486SX Open pins 2 & 3 Open closed ODP486SX Closed pins 1 & 2 pins 1 & 2 closed closed 80486DX Closed pins 1 & 2 pins 2 & 3 closed closed