BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB 1433/1450AEA-P Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set VLSI Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 230mm x 218mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Speaker J1 Turbo switch J5 Power LED & keylock J2 5v DC ground J6 Turbo LED J3 External battery JP8 Reset switch J4 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP4 pins 2 & 3 alter closed » Tag RAM size select 7- bit JP6 pins 1 & 2 closed Tag RAM size select 8- bit JP6 pins 2 & 3 closed » Battery type select RTC 146818 JP11 Open Battery type select Dallas 1287 JP11 Closed » Monitor type select monochrome JP14 pins 1 & 2 closed Monitor type select color JP14 pins 2 & 3 closed » CMOS memory normal operation JP16 pins 2 & 3 closed CMOS memory clear JP16 pins 1 & 2 closed 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) 256K x 9 (4) 1M x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M 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 JP12 JP19 64KB Open pins 1 & 2 closed 128KB pins 1 & 2, 3 & 4 pins 2 & 3 closed closed 256KB pins 1 & 2, 3 & 4, 5 & pins 1 & 2 closed 6 closed CPU TYPE CONFIGURATION Type JP13 JP20 80486SX Open pins 1 & 2 closed 80487SX pins 1 & 2 closed pins 2 & 3 closed 80486DX/DX2 pins 2 & 3 closed pins 2 & 3 closed Overdrive pins 1 & 2 closed pins 2 & 3 closed CPU SPEED CONFIGURATION Speed JP5 JP10 80486DX-50 pins 1 & 2 closed Closed All other CPU speeds pins 2 & 3 closed Open