WYSE TECHNOLOGY, INC. WYSE DECISION 486SI Processor 80486SX/80486DX/80486DX2 Processor Speed 16/20/25/33/50(internal)/66(internal)MHz Chip Set Unidentified Max. Onboard 64MB DRAM Cache 64/256KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options PS/2 mouse port, parallel port, serial ports (2), VGA port, floppy drive interface, IDE interface NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN1 Floppy drive interface CN6 VGA port CN2 IDE interface CN7 Parallel port CN3 External battery J1 Serial port 2 CN4 Front panel connector J2 Serial port 1 CN5 Riser Card SL1 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP16 Closed Monitor type select monochrome JP16 Open » Factory configured - do not JP17 Open alter IDE interface enabled JP18 Open » IDE interface disabled JP18 Closed » Factory configured - do not JP19 Open alter » Factory configured - do not JP20 Open alter » Factory configured - do not JP21 Open alter » Factory configured - do not JP22 Open alter » IRQ2 enabled JP33 Open IRQ2 disabled JP33 Closed » ET4000 VGA card revision select JP37 Closed revision G ET4000 VGA card revision select JP37 Open revision F » Clock generator select normal JP41 pins 1 & 2 closed Clock generator select JP41 pins 2 & 3 oscillator closed » WY-790 enabled JP42 Closed WY-790 disabled JP42 Open » Diskette controller IRQ select JP44 pins 1 & 2 IRQ7 closed Diskette controller IRQ select JP44 pins 2 & 3 IRQ5 closed » Linear address enabled JP46 pins 2 & 3 closed Linear address disabled JP46 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 1M x 36 (1) 256K x NONE NONE 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 17MB (1) 4M x 36 (1) 256K x NONE NONE 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x NONE 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 NONE NONE 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE 25MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 28MB (1) 4M 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 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 37MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP4 JP5 JP7 None Open Open Open 64KB Open Open Open 256KB Closed Closed Closed CPU TYPE CONFIGURATION Type JP1 JP2 JP3 80486SX Open Open pins 1 & 2 closed 80486DX pins 1 & 2 Closed pins 2 & 3 closed closed SL80486DX2 pins 1 & 2 Closed pins 2 & 3 closed closed CPU SPEED CONFIGURATION Speed JP38 JP39 JP40 16MHz Closed Open Closed 20MHz Closed Open Open 25MHz Open Closed Closed 33MHz Open Closed Open 50iMHz Open Closed Closed 66iMHz Open Closed Open VRAM CONFIGURATION Size Bank 0 Bank 1 512KB (4) 256K x 4 NONE 1MB (4) 256K x 4 (4) 256K x 4 VGA CONFIGURATION Setting JP8 JP35 JP45 Enabled pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed Disabled pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed VGA WAIT STATE CONFIGURATION Wait states JP31 JP32 0 wait states Closed Open 1 wait state Open Closed