UNIDENTIFIED ISA-486SV2 Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set Unidentified Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery BCON1 Reset switch CON3 Turbo switch CON1 Speaker CON4 Turbo LED CON2 Power LED & keylock CON5 USER CONFIGURABLE SETTINGS Function Jumper Position Battery type select internal BJP1 pins 1 & 2 closed Battery type select external BJP1 pins 2 & 3 closed Monitor type select CGA JP2 pins 2 & 3 closed Monitor type select JP2 pins 1 & 2 monochrome/EGA/VGA closed CPU type select AMD/Intel JP22 pins 2 & 3 closed CPU type select Cyrix JP22 pins 1 & 2 closed » Factory configured - do not alter TP13 pins 1 & 2 closed » Factory configured - do not alter TP14 pins 1 & 2 closed » Factory configured - do not alter TP15 pins 1 & 2 closed » Factory configured - do not alter TP17 pins 2 & 3 closed » Factory configured - do not alter TP25 1D » Factory configured - do not alter TP26 Open » Factory configured - do not alter TP27 1D Note: The location of jumpers TP17, TP25, TP26 and TP27 are unidentified. 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 20MB (4) 1M x 9 (4) 4M x 9 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 CJ1 CJ2 CJ3 64KB pins 2 & 3 pins 2 & 3 Open closed closed 128KB pins 1 & 2 Open Closed closed 256KB pins 1 & 2 pins 1 & 2 Open closed closed CPU TYPE CONFIGURATION Type CPJ1 CPJ2 CPJ3 80486SX (PQFP) pins 1 & 2, 3 & pins 1 & 2 pins 1 & 2 4 closed closed closed 80486SX (PGA) pins 2 & 3 pins 2 & 3 Open closed closed 80487SX pins 1 & 2, 3 & pins 1 & 2 pins 1 & 2 4 closed closed closed 80486DX pins 1 & 2, 3 & pins 2 & 3 pins 2 & 3 4 closed closed closed 80486DX2 pins 1 & 2, 3 & pins 2 & 3 pins 2 & 3 4 closed closed closed Pentium Overdrive pins 1 & 2, 3 & pins 1 & 2 pins 1 & 2 4 closed closed closed Note: See also JP22 in User Configurable Settings table. CPU SPEED CONFIGURATION Speed CS1 CS2 CS3 20MHz pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 25MHz pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed 33MHz pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed 40MHz pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 50iMHz pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed 50MHz pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed 66iMHz pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed