GIGA-BYTE TECHNOLOGY CO., LTD. GA-486VF Processor 80486SX/80487SX/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set SiS Max. 128MB Onboard DRAM Cache 64/128/256/512KB BIOS AWARD Dimensions 230mm x 218mm I/O 32-bit VESA local bus slots (3), green PC feature Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Power LED & keylock J7 Turbo switch J3 External power JP33 Turbo LED J4 LED connector JP34 Speaker J5 32-bit VESA Local bus SL1-SL3 slots Reset switch J6 USER CONFIGURABLE SETTINGS Function Jumper Position Turbo mode enabled J3 pins 2 & 3 closed Turbo mode disabled J3 pins 1 & 2 closed 80486DX2, DX or OverDrive JP8 pins 1 & 2 installed closed 80486SX installed JP8 pins 2 & 3 closed » Non AMD CPU JP11 Closed AMD CPU JP11 Open » For Cyrix CPU installed JP18 Open For normal operation JP18 Closed » Normal CPU ADS# operation JP20 pins 2 & 3 closed Delay CPU ADS# clock operation JP20 pins 1 & 2 closed Cyrix CPU in use *JP21 pins 1 & 2 closed Other CPU in use *JP21 pins 2 & 3 closed » DX4CPU x 2 JP24 pins 3 & 4 closed » DX4CPU x 3 JP24 Open » Cyrix CPU JP24 pins 2 & 3 closed CMOS memory normal operation JP16 pins 1 & 2 closed CMOS memory clear JP16 pins 2 & 3 closed Green PC mode disabled JP26 Open Green PC mode enabled JP26 Closed » Monitor type select CGA JP17 Closed Monitor type select other JP17 Open Note: *This option applies to Revision 6 only. 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 64MB (4) 16M x 9 NONE 65MB (4) 256K x 9 (4) 16M x 9 68MB (4) 1M x 9 (4) 16M x 9 80MB (4) 4M x 9 (4) 16M x 9 128MB (4) 16M x 9 (4) 16M 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) 16K x 8/(1) 32K x 8 256KB (4) 64K x 8 NONE (1) 16K x 8/(1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP1 JP2 JP3 JP4 64KB Open Open Open N/A 128KB Closed Open Open pins 1 & 2 closed 256KB Closed Closed Open pins 2 & 3 closed 256KB Closed Closed Open pins 1 & 2 closed 512KB Closed Closed Closed pins 1 & 2 closed VL-BUS SPEED CONFIGURATION CPU Type JP29 DX-50/40 MHz Closed Other Speed Open CPU VOLTAGE SELECTION CPU Type JP36 JP37 5 Voltage CPU Closed Closed 3.3 Voltage DX4 CPU Open Open CPU SPEED SELECTION Speed JP5 JP6 JP7 25MHz Open Open Closed 33MHz Closed Closed Closed 40MHz Open Closed Closed 50MHz Closed Open Open 50iMHz Open Open Closed 66iMHz Closed Closed Closed 75iMHz Open Open Closed 100iMHz Closed Closed Closed DELAY LOCAL BUS CLOCK J2 (VESA1) J8(VESA2) J9(VESA3) » For normal pins 1 & 2 pins 1 & 2 pins 1 & 2 operation closed closed closed DX-33, DX-40, pins 2 & 3 pins 2 & 3 pins 2 & 3 DX-50, DX2-66, closed closed closed DX4-75, DX4-100* Note: *For some VL-Bus interface cards that need more address setup time in above listed speeds.