YOUNG MICRO SYSTEMS, INC. VEGA 486 GREEN AIO 2VLB Processor 80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set Symphony Max. Onboard 128MB DRAM Cache 64/128/256/512/1024KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse connector, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Serial port 2 CN2 Speaker J2 IDE interface CN3 Turbo LED J3 Floppy drive CN4 interface Turbo switch J4 PS/2 mouse connector CN5 Power LED & keylock J5 Parallel port CN6 Resume connector J6 IDE interface LED IJ4 Serial port 1 CN1 32-bit VESA Local bus SL1 & SL2 slots USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not IJP1 Open alter » Factory configured - do not IJP2 Open alter » Factory configured - do not IJP3 Open alter » Factory configured - do not IW4/ 1 & 2 Open alter » Factory configured - do not IW4/ 3 & 4 Open alter » Factory configured - do not IW4/ 5 & 6 Open alter » Factory configured - do not IW4/ 7 & 8 Open alter » IDE interface enabled IW4/ 9 & 10 Open IDE interface disabled IW4/ 9 & 10 Closed » Factory configured - do not JP9 Open alter » Factory configured - do not JP10 Open alter » Cache control select combined JP16 pins 1 & 2 closed Cache control select separate JP16 pins 2 & 3 closed » Monitor type select color JP17 Closed Monitor type select monochrome JP17 Open » BIOS type select regular JP18 pins 1 & 2 closed BIOS type select flash EPROM JP18 pins 2 & 3 closed » Factory configured - do not JP22 Open alter » Factory configured - do not JP23 Open alter » Factory configured - do not JP24 Open alter » Factory configured - do not JP28 Open alter » Factory configured - do not JP29 Open alter » Factory configured - do not JP30 Open alter » Factory configured - do not JP31 Open alter » Factory configured - do not W1 Open alter » Factory configured - do not W2 Open alter » Factory configured - do not W3 Open alter » Factory configured - do not W4 Open alter » Factory configured - do not W5 Open alter » Factory configured - do not W6 Open alter » Parallel port IRQ select IRQ7 W11 pins 2 & 3 closed Parallel port IRQ select IRQ5 W11 pins 1 & 2 closed » Factory configured - do not W12 Open alter » Onboard port select enabled WT1 Open Onboard port select disabled WT1 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 (U1 & U2) 64KB (4) 8K x 8 (4) 8K x 8 (2) 8K x 8 128KB (4) 32K x 8 NONE (2) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (2) 32K x 8 512KB (4) 128K x 8 NONE (2) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (2) 128K x 8 CACHE JUMPER CONFIGURATION Size JD1 JD2 JT1 JT2 JT3 64KB 2 & 3 2 & 3 1 & 2 1 & 2 1 & 2 128KB 1 & 2 1 & 2 2 & 3 1 & 2 1 & 2 256KB 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 512KB 1 & 2 1 & 2 2 & 3 2 & 3 2 & 3 1MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP1 JP2 JP4 JP5 JP6 JP11 P1 - R2-1/4 P4 486SX Open Open Open 2 & Closed Open Closed Open 3 486SL Open Closed Open 1 & Closed 1 & Closed Closed 2 2 486DX Open Open Open 1 & Closed 1 & Closed Open 2 2 486DX4 Open Closed Open 1 & Closed 2 & Open Closed 2 3 Overdrive Closed Closed Closed 1 & Open 2 & Open Closed 2 3 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP25 JP26 JP27 25MHz Closed Open Closed 33MHz Open Open Closed 40MHz Closed Closed Open 50iMHz Closed Open Closed 50MHz Open Closed Open 66iMHz Open Open Closed VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states JP20 JP21` < 33MHz 0 wait states pins 1 & 2 pins 1 & 2 closed closed > 33MHz 1 wait state pins 2 & 3 pins 2 & 3 closed closed PARALLEL PORT CONFIGURATION Type W14 W15 Enhanced parallel port Open pins 2 & 3 closed (EPP) mode Standard mode Closed pins 1 & 2 closed