GIGA-BYTE TECHNOLOGY CO., LTD. GA-486VT Processor 80486SX/80487SX/CX486S/CX486S2/80486DX/ 80486DX2/Pentium Overdrive Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set UMC Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 230mm x 218mm I/O Options 32-bit VESA local bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J2 Power LED & keylock J9 Turbo LED J5 32-bit VESA Local bus S1 slot Reset switch J6 32-bit VESA Local bus S2 slot Turbo switch J7 32-bit VESA Local bus S3 slot Speaker J8 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J3 pins 1 & 2 closed CMOS memory clear J3 pins 2 & 3 closed » Monitor type select CGA J11 Closed Monitor type select all others J11 Open 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 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 32MB (4) 4M x 9 (4) 4M 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) 32K x 8 CACHE JUMPER CONFIGURATION Size W0 W1 W2 W3 W4 64KB pins 1 & Open Open pins 1 & pins 1 & 2 2 2 128KB pins 1 & Closed Open pins 2 & pins 2 & 2 3 3 256KB pins 2 & Closed Closed pins 1 & pins 2 & 3 2 3 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP3 JP10 W6 80486SX Open pins 1 & 2 pins 2 & 3 closed closed 80487SX Open pins 1 & 2 pins 1 & 2 closed closed CX486S Open pins 1 & 2 pins 2 & 3 closed closed CX486S2 Closed pins 1 & 2 pins 2 & 3 closed closed 80486DX Open pins 1 & 2 pins 1 & 2 closed closed 80486DX2 Open pins 1 & 2 pins 1 & 2 closed closed Pentium Overdrive Open pins 2 & 3 pins 1 & 2 closed closed CPU SPEED CONFIGURATION Speed JP2 JP6 W5 20MHz pins 1 & 2 Open Open closed 25MHz pins 1 & 2 Open Open closed 33MHz pins 1 & 2 Open Open closed 40MHz pins 2 & 3 Closed Closed closed 50i MHz pins 1 & 2 Open Open closed 50MHz pins 2 & 3 Closed Open closed 66i MHz pins 1 & 2 Open Open closed VESA CONFIGURATION Setting JP5 0 wait states Open 1 wait state Closed