BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-1425AEA-V, MB-1433AEA-V, MB-1440AEA-V, MB-1450AEA-V Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set Advanced Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery JP8 Turbo switch JP15E Speaker JP15A 5V ground connector JP15F Power LED & keylock JP15B 32-bit VESA Local bus S1 slot Turbo LED JP15C 32-bit VESA Local bus S2 slot Reset switch JP15D USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter J01 N/A » Factory configured - do not alter JP4 pins 2 & 3 closed 7 Bit TAG RAM installed JP6 pins 1 & 2 closed 8 Bit TAG RAM installed JP6 pins 2 & 3 closed Dallas Real time clock 1287 JP11 Closed installed Battery & Real time clock 146818 JP11 Open installed » Monitor type select color JP14 pins 2 & 3 closed Monitor type select monochrome JP14 pins 1 & 2 closed » CMOS memory normal operation JP16 pins 2 & 3 closed CMOS memory clear JP16 pins 1 & 2 closed » CPU PQFP installed JP22 pins 1 & 2 closed CPU PGA installed JP22 pins 2 & 3 closed » VESA bus clock asynchronous mode JP26 pins 1 & 2 closed VESA bus clock synchronous mode JP26 pins 2 & 3 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) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Max Cachable Bank 0 Bank 1 TAG 64KB 8MB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB 16MB (4) 32K x 8 NONE (1) 8K x 8 256KB 32MB (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 and 3 & 4 pins 2 & 3 closed closed 256KB Closed pins 1 & 2 closed CPU TYPE CONFIGURATION Type JP13 JP20 80486SX Open pins 1 & 2 closed 80487SX pins 1 & 2 closed pins 2 & 3 closed 80486DX pins 2 & 3 closed pins 2 & 3 closed ODP486SX pins 1 & 2 closed pins 2 & 3 closed 80486DX2 pins 2 & 3 closed pins 2 & 3 closed CPU SPEED CONFIGURATION Speed JP5 JP10 JP23 JP24 25MHz pins 2 & 3 Open Open Open closed 33MHz pins 2 & 3 Open Closed Open closed 40MHz pins 1 & 2 Closed Open Closed closed 50i MHz pins 2 & 3 Open Open Open closed 50MHz pins 1 & 2 Closed Open Open closed 66i MHz pins 2 & 3 Open Closed Open closed VESA WAIT STATE CONFIGURATION Wait states J02 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed