SOYO COMPUTER CO., LTD. 80486 DX/SX CACHE Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/50(internal)/50/66(internal)MHz Chip Set ETEQ Max. Onboard DRAM 32MB Cache 64/256KB BIOS AMI Dimensions 220mm x 218mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J17 External battery J20 Speaker J18 Turbo switch J21 Reset switch J19 Turbo LED J22 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter J4 Open » Factory configured - do not alter J12 pins 1 & 2 closed » Factory configured - do not alter J13 pins 2 & 3 closed » Factory configured - do not alter J23 pins 2 & 3 closed » Monitor type select color JP3 Closed Monitor type select monochrome JP3 Open » CMOS memory normal operation JP5 pins 1 & 2 closed CMOS memory clear JP5 pins 2 & 3 closed » Factory configured - do not alter JP6 pins 1 & 2 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 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 17MB (4) 256K x 9 (4) 4M x 9 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 TAG 64KB (8) 8K x 8 (1) 8K x 8 256KB (8) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J5 J6 J7 J8 J9 64KB 1 & 2 1 & 2 Open Open Open 256KB 2 & 3 2 & 3 Closed Closed Closed Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type J10 J11 J15 J16 80486SX - pins 1 & 2 Open pins 2 & 3 pins 2 & 3 25MHz closed closed closed 80487SX - pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 1 & 2 25MHz closed closed closed closed 80487SX - pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 1 & 2 33MHz closed closed closed closed 80486DX - pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 1 & 2 33MHz closed closed closed closed 80486DX - pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 50MHz closed closed closed closed 80486DX2 - pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 1 & 2 50MHz closed closed closed closed 80486DX2 - pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 1 & 2 66MHz closed closed closed closed Note:Oscillator at Y1 must match the external speed of the CPU installed.