UNIDENTIFIED U486 Processor 80486SX/80487SX/80486DX Processor Speed 33/50MHz Chip Set UMC Video Chip Set None Maximum Onboard Memory 32MB Maximum Video Memory None Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J3 Turbo switch J10 Speaker J8 Turbo LED J11 Power LED & keylock J9 Reset switch J12 USER CONFIGURABLE SETTINGS Function Label Position » Battery type select internal J1 Closed Battery type select external J1 Open » Keyboard clock select synchronous J5 Pins 2 & 3 closed Keyboard clock select asynchronous J5 Pins 1 & 2 closed » Monitor type select color J6 Closed Monitor type select monochrome J6 Open » CMOS memory normal operation J13 Pins 1 & 2 closed CMOS memory clear J13 Pins 2 & 3 closed » Turbo sped disabled JP1 Closed Turbo speed enabled JP1 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 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 Note: The location of banks 0 & 1 are unidentified. CACHE JUMPER CONFIGURATION Size W1 W2 W3 W5 W6 W7 W8 W9 64KB 1 & Open 1 & 1 & Open Open Open Open 2 2 2 128KB 2 & 1 & 2 1 & 2 & Closed Open Open Closed 3 2 3 256KB 1 & 2 & 3 2 & 2 & Closed Closed Closed Closed 2 3 3 Note: Pins designated should be in the closed position. CPU CLOCK MODE SELECTION Speed W10 1x Open 2x Closed CPU TYPE SELECTION Type W11 W12 80486SX Pins 2 & 3 closed Open 80487SX Pins 1 & 2, 3 & 4 Pins 2 & 3 closed closed 80486DX Pins 1 & 2, 3 & 4 Pins 1 & 2 closed closed