SOYO COMPUTER CO., LTD. SY-24A Processor 80386DX/80486SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set CONTAQ Max. Onboard DRAM 32MB Cache 64/256KB BIOS AMI Dimensions 330mm x 217mm I/O Options None NPU Options 80387/3167 [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 » Monitor type select monochrome JP3 Open Monitor type select color JP3 Closed » CMOS memory normal operation JP5 pins 1 & 2 closed CMOS memory clear JP5 pins 2 & 3 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) 1M x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 17MB (4) 4M x 9 (4) 256K x 9 2OMB (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 (U28) Dirty Bit (U44) 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 (1) 16K x 4 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 (1) 16K x 4 Note:Dirty bit need only be filled if writeback mode is selected in the CMOS-advanced chipset setup. CACHE JUMPER CONFIGURATION Size JP30 JP31 JP32 JP33 JP34 JP35 64KB Open Open Open Open Open 2 & 3 256KB Closed Closed Closed Closed 1 & 2 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP36 JP37 JP38 JP39 JP40 JP41 JP42 JP43 JP44 80386DX 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 3 3 3 3 3 3 3 3 3 80486SX 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 2 2 2 2 2 2 2 2 2 80486DX 1 & 1 & 1 & 1 & 2 & 2 & 2 & 2 & 1 & 2 2 2 2 3 3 3 3 2 80486DX2 1 & 1 & 1 & 1 & 2 & 2 & 2 & 2 & 1 & 2 2 2 2 3 3 3 3 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed OSC2 JP8 JP13 JP14 25/50iMHz 25MHz pins 1 & 2 Open Closed closed 25/50iMHz 50MHz pins 2 & 3 Open Closed closed 33/66iMHz 33.33MHz pins 1 & 2 Closed Open closed 33/66iMHz 66.667MHz pins 2 & 3 Closed Open closed 40MHz 40MHz pins 1 & 2 Open Open closed 40MHz 80MHz pins 2 & 3 Open Open closed 50MHz 50MHz pins 1 & 2 Closed Closed closed