SOYO TECHNOLOGY CO., LTD. SY-027 B2/B5 Processor 80486SX/SL80486SX/CX486DX/U5/AM486DXL/80486DX/SL80486DX/ CX486DX2/AM486DX2/AM486DXL2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)100(internal)MHz Speed Chip Set Unidentified Max. 64MB Onboard DRAM Cache 128/256 BIOS Award Dimensions 220mm x 220mm I/O 32-bit PCI slots (4), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location IDE interface J1 Turbo switch J21 Power LED & keylock J17 Turbo LED J22 Speaker J18 IDE interface LED JP28 Reset switch J19 Green PC connector JW6 External battery J20 32-bit PCI slots PCI1 - PCI4 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP32 Closed alter » CMOS memory normal operation JP33 Open CMOS memory clear JP33 Closed » Factory configured - do not JP65 Open alter Note: The location of JP32 is unidentified. DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (1) 512K x 36 NONE 4MB (1) 512K x 36 (1) 512K x 36 4MB (1) 1M x 36 NONE 6MB (1) 1M x 36 (1) 512K x 36 8MB (1) 1M x 36 (1) 1M x 36 8MB (1) 2M x 36 NONE 10MB (1) 2M x 36 (1) 512K x 36 12MB (1) 2M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 16MB (1) 4M x 36 NONE 18MB (1) 4M x 36 (1) 512K x 36 20MB (1) 4M x 36 (1) 1M x 36 24MB (1) 4M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 NONE 34MB (1) 8M x 36 (1) 512K x 36 36MB (1) 8M x 36 (1) 1M x 36 40MB (1) 8M x 36 (1) 2M x 36 48MB (1) 8M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 TAG 128KB (4) 32K x 8 (1) 8K x 8 256KB (4) 64K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP26 128KB Open 256KB pins 1 & 2 closed CPU TYPE CONFIGURATION Type JP6 JP9 JP10 JP13 JP23 JP24 80486SX 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 SL80486SX 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 CX486DX 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 U5 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 80486DX 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 AM486DXL 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 SL80486DX 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 CX486DX2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 AM486DX2 2 & 3 1 & 2 1 & 2 1 & 2 2 & 3 1 & 2 80486DX2 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 AM486DXL2 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 SL80486DX2 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 AM486DX4 2 & 3 1 & 2 1 & 2 1 & 2 2 & 3 1 & 2 80486DX4 2 & 3 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 P24D 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 P24T 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 Note: Pins designated should be in closed position. CPU TYPE CONFIGURATION (CON’T) Type JP52 JP53 JP54 JP55 JP56 JP57 80486SX Open Open Open Open Open Open SL80486SX Open Open Open Open 1 & 2 Open CX486DX 2 & 3 Open Open 1 & 2 1 & 2 2 & 3 U5 3 & 4 Open Open Open 2 & 3 Open 80486DX Open Open Open Open Open Open AM486DXL 3 & 4 Open Open Open 2 & 3 Open SL80486DX Open Open Open Open 1 & 2 Open CX486DX2 2 & 3 Open Open 1 & 2 1 & 2 2 & 3 AM486DX2 Open Open Open Open Open Open 80486DX2 Open Open Open Open Open Open AM486DXL2 3 & 4 Open Open Open 2 & 3 Open SL80486DX2 Open Open Open Open 1 & 2 Open AM486DX4 Open Open Open Open Open Open 80486DX4 Open Open Open Open 1 & 2 Open P24D Open Closed Closed Open 1 & 2 Open P24T 1 & 2 Open Open 2 & 3 1 & 2 1 & 2 Note: Pins designated should be in closed position. CPU TYPE CONFIGURATION (CON’T) Type JP58 JP59 JP60 JP62 JP63 JP64 80486SX Open Open Open Open 2 & 3 1 & 2 SL80486SX 1 & 2 2 & 3, Open Open 2 & 3 3 &4 4 & 5 CX486DX 2 & 3 1 & 2, Open 3 & 4 1 & 2, 3 &4 3 & 4 3 & 4 U5 Open Open Open 1 & 2, 2 & 3 1 & 2 3 & 4 80486DX Open Open Open 3 & 4 1 & 2, 1 & 2 3 & 4 AM486DXL Open Open Open 1 & 2, 1 & 2, 1 & 2 3 & 4 3 & 4 SL80486DX 1 & 2 2 & 3, Open 3 & 4 1 & 2, 3 &4 4 & 5 3 & 4 CX486DX2 2 & 3 1 & 2, Open 3 & 4 1 & 2, 3 &4 3 & 4 3 & 4 AM486DX2 Open Open Open 3 & 4 1 & 2, 1 & 2 3 & 4 80486DX2 Open Open Open 3 & 4 1 & 2, 1 & 2 3 & 4 AM486DXL2 Open Open Open 1 & 2, 1 & 2, 1 & 2 3 & 4 3 & 4 SL80486DX2 1 & 2 2 & 3, Open 3 & 4 1 & 2, 3 &4 4 & 5 3 & 4 AM486DX4 Open Open Open 3 & 4 1 & 2, 1 & 2 3 & 4 80486DX4 1 & 2 2 & 3, Open 3 & 4 1 & 2, 3 &4 4 & 5 3 & 4 P24D 1 & 2 2 & 3, Closed 3 & 4 1 & 2, 3 &4 4 & 5 3 & 4 P24T 1 & 2 2 & 3, Open 2 & 3 1 & 2, 3 & 4, 4 & 5 3 & 4 5 & 6 Note: Pins designated should be in closed position. CPU SPEED CONFIGURATION Speed JP22 25MHz pins 1 & 2 closed 33MHz pins 1 & 2, 3 & 4, 5 & 6 closed 40MHz pins 1 & 2, 3 & 4 closed 50iMHz pins 1 & 2 closed 50MHz pins 5 & 6 closed 66iMHz pins 1 & 2, 3 & 4, 5 & 6 closed 75iMHz pins 1 & 2 closed 80iMHz pins 1 & 2, 3 & 4 closed 100iMHz pins 5 & 6 closed CPU SPEED CONFIGURATION (AM486 ONLY) Speed JP61 2x pins 2 & 3 closed 3x pins 1 & 2 closed CPU SPEED CONFIGURATION (80486DX4 ONLY) Speed JP51 2x pins 2 & 3 closed 2.5x pins 1 & 2 closed 3x Open