YOUNG MICRO SYSTEMS, INC. VS486F/S-3VL Processor 80486SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/66(internal)MHz Chip Set Symphony Max. Onboard DRAM64MB Cache 64/256/1024KB 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 J1 Turbo switch JP24 Power LED & keylock JP20 32-bit VESA Local bus S1 slot Speaker JP21 32-bit VESA Local bus S2 slot Reset switch JP22 32-bit VESA Local bus S3 slot Turbo LED JP23 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not J2 Unknown alter » Flash BIOS write protect enabled JP2 pins 1 & 2 closed Flash BIOS write protect JP2 pins 2 & 3 disabled closed » Factory configured - do not JP3 Unknown alter 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) 1M x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 17MB (4) 4M x 9 (4) 256K 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 CPU SPEED CONFIGURATION Speed JA1 JP4 JP5 JP6 JP7 JP10 JP11 25MHz pins pins Open Closed Closed pins pins 2 2 & 3 2 & 3 1 & 2 & 3 33MHz pins pins Closed Open Closed pins pins 2 2 & 3 2 & 3 1 & 2 & 3 50I pins pins Open Closed Closed pins pins 1 MHz 1 & 2 1 & 2 1 & 2 & 2 66I pins pins Closed Open Closed pins pins 2 MHz 2 & 3 2 & 3 1 & 2 & 3 Note:Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP12 JP13 JP14 JP15 JP16 JP17 JP18 JP30 25MHz Closed Open Closed Open Open Closed Open Open 33MHz Closed Open Closed Open Open Closed Open Open 50I Closed Closed Open Open Closed Closed Closed Open MHz 66I Closed Closed Open Open Closed Closed Closed Open MHz CACHE CONFIGURATION Size Max Cachable Cache TAG 64KB 8MB (4) 8K x 8 (1) 8K x 8 128KB 32MB (4) 32K x 8 (1) 32K x 8 256KB 64MB (4) 128K x 8 (1) 128K x 8 CACHE JUMPER CONFIGURATION Size JP8 JP9 JP19 JP25 JP26 64KB pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 256KB pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 2 & 3 1MB pins 1 & 2 pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3