YOUNG MICRO SYSTEMS, INC. VEGA 486G-VIP (REV. 1.0) Processor 80486SX/80486DX/80486DX2/80486DX4/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Intel Max. 128MB Onboard DRAM Cache 128/256/512KB BIOS AMI Dimensions 254mm x 218mm I/O 32-bit VESA local bus slot, 32-bit PCI slots (3), IDE interface, Options PS/2 mouse connector NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Speaker CN1 IDE interface LED CN6 Reset switch CN2 IDE interface CN7 Turbo LED CN3 32-bit PCI slots PC1 - PC3 Turbo switch CN4 32-bit VESA local bus SL1 slots PS/2 mouse connector CN5 USER CONFIGURABLE SETTINGS Function Jumper Position » IDE interface enabled JP4 pins 1 & 2 closed IDE interface disabled JP4 pins 2 & 3 closed » Factory configured - do not JP9 N/A alter » Flash BIOS write protect JP10 pins 2 & 3 disabled closed Flash BIOS write protect enabled JP10 pins 1 & 2 closed » Mouse IRQ12 enabled JP15 Closed Mouse IRQ12 disabled JP15 Open » Monitor type select color JP16 Closed Monitor type select monochrome JP16 Open » SMI disabled JP25 pins 2 & 3 closed SMI enabled JP25 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 32K x 8 256KB (4) 64K x 8 NONE (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 512KB (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JC1 JC2 JC3 JC4 JC5 128KB 2 & 3 1 & 2 Open Open Open 256KB 1 & 2 2 & 3 Open Closed Open 256KB 1 & 2 1 & 2 Closed Closed Open 512KB 1 & 2 1 & 2 Open Closed Closed 512KB 1 & 2 1 & 2 Closed Closed Closed Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP2 JP3 JP26 JP43 JR57 80486SX pins 2 & 3 Open Open Open Closed closed 80486DX pins 1 & 2 Open Open Open Closed closed 80486DX2 pins 1 & 2 Closed Closed Open Closed closed 80486DX4 pins 1 & 2 Closed Closed Open Closed closed P24D pins 1 & 2 Closed Closed Open Open closed Pentium pins 1 & 2 Closed Closed Open Closed Overdrive closed CPU SPEED CONFIGURATION Speed JP7 JP8 JP40 JP41 25MHz pins 2 & 3 pins 2 & 3 Open Closed closed closed 33MHz pins 1 & 2 pins 2 & 3 Closed Open closed closed 40MHz pins 2 & 3 pins 1 & 2 Open Open closed closed 50iMHz pins 2 & 3 pins 2 & 3 Open Closed closed closed 66iMHz pins 1 & 2 pins 2 & 3 Closed Open closed closed 75iMHz pins 2 & 3 pins 2 & 3 Open Closed closed closed 100iMHz pins 1 & 2 pins 2 & 3 Closed Open closed closed CPU SPEED CONFIGURATION (80486DX4 ONLY) Speed JP1 2x pins 1 & 2 closed 2.5x pins 2 & 3 closed 3x Open CPU VOLTAGE CONFIGURATION Voltage JV0 JV3 JV4 3.3V Open Open Open 5.0V Closed Closed Closed VESA WAIT STATE CONFIGURATION Wait states JP36 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP37 <= 33MHz Open > 33MHz Closed CMOS CONFIGURATION CPU Type JP12 JP13 CMOS memory normal Closed Closed operation CMOS memory clear Open Open