GIGA-BYTE TECHNOLOGY CO., LTD. GA-486VF REV.8C Processor CX486M6/AM486/80486SX/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 connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Power LED & keylock J7 Turbo switch J3 Green PC connector JP33 Turbo LED J4 Green PC LED connector JP34 Speaker J5 32-bit VESA local bus S1 - S3 slots Reset switch J6 USER CONFIGURABLE SETTINGS Function Jumper Position » CPU type select all CPU’s JP11 Closed CPU type select AMD CPU only JP11 Open » CMOS memory normal operation JP16 pins 1 & 2 closed CMOS memory clear JP16 pins 2 & 3 closed » Monitor type select CGA JP17 Closed Monitor type select all others JP17 Open » CPU type select all CPU types JP21 pins 2 & 3 closed CPU type select Cyrix, P24D, AMD JP21 pins 1 & 2 enhanced CPU only closed » Green PC normal operation JP26 Open Green PC green mode JP26 Closed » Cache type select write through JP30 pins 2 & 3 closed Cache type select write back JP30 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 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 or (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 16K x 8 or (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 CPU TYPE CONFIGURATION Type JP24 CX486M6 pins 2 & 3 closed AM486SL pins 2 & 5 closed P24D pins 2 & 5 closed AM486DX4 2x pins 3 & 4 closed AM486DX4 3x pins 3 & 4 open 80486DX4 2x pins 3 & 4 closed 80486DX4 3x pins 3 & 4 open CPU TYPE CONFIGURATION Type JP8 JP18 CX486M6 N/A Open 80486SX pins 2 & 3 closed Closed 80486DX pins 1 & 2 closed Closed 80486DX2 pins 1 & 2 closed Closed 80486DX4 pins 1 & 2 closed Closed Pentium Overdrive pins 1 & 2 closed Closed CPU SPEED CONFIGURATION Speed JP5 JP6 JP7 JP29 25MHz Open Open Closed Open 33MHz Closed Closed Closed Open 40MHz Open Closed Closed Closed 50iMHz Open Open Closed Open 50MHz Closed Open Open Closed 66iMHz Closed Closed Closed Open 75i (40 x 2) Open Closed Closed Closed MHz 75i (25 x 3) Open Open Closed Open MHz 100i (50 x Closed Open Open Closed 2) MHz 100i (33 x Closed Closed Closed Open 3) MHz CPU VOLTAGE CONFIGURATION Function JP36 JP37 3.3 v Open Open 5 v Closed Closed VOLTAGE DELAY CONFIGURATION Function J2 J8 J9 JP20 Normal card installed 1 & 2 1 & 2 1 & 2 2 & 3 Card installed needs 2 & 3 2 & 3 2 & 3 1 & 2 address time Note: Pins designated should be in closed position. Systems utilizing cards that need more address time are: DX4-100, DX4-75, DX2-66, DX-50, DX-40, DX-33.