BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-1433/1440/1450 UCV-A Processor CX486S/80486SX/80487SX/AMD80486DX/80486DX/ODP486SX/80486DX2/ Pentium Overdrive Processor 20/25/33/40(internal)/50(internal)/50/66(internal)MHz Speed Chip Set VLSI Max. 64MB Onboard DRAM Cache 32/64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Speaker J1 Turbo switch J5 Power LED & J2 5v DC ground J6 keylock Turbo LED J3 External battery JP8 Reset switch J4 32-bit VESA Local SL1, SL2, SL3 bus slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP8 pins 2 & 3 closed CMOS memory clear JP8 pins 3 & 4 closed » Power good signal detect from JP11 pins 1 & 2 power supply closed Power good signal detect from JP11 pins 2 & 3 board closed » CPU type select PGA or PQFP on JP12 pins 2 & 3 board closed CPU type select PQFP and PGA on JP12 pins 1 & 2 board - disables PQFP closed » Monitor type select monochrome JP14 pins 1 & 2 closed Monitor type select color JP14 pins 2 & 3 closed » Weitek Power 9000 VGA card not JP28 pins 1 & 2 installed closed Weitek Power 9000 VGA card JP28 pins 2 & 3 installed closed Note: External battery and CMOS memory configuration share the same jumper. Pins 2 & 3 on JP8 must be closed in order for system to function This is done with either a jumper or external battery installed. 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) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 32KB (4) 8K x 8 NONE (1) 8K x 8 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 JP5 JP6 JP7 JP9 JP10 32KB 2 & 3 Open Open Open Open 64KB 1 & 2 Open Open Closed Open 128KB 2 & 3 2 & 3 Closed Closed Open 256KB 1 & 2 1 & 2 Closed Closed 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP16 JP17 80486SX/CX486S pins 1 & 2 closed pins 2 & 3 closed 80487SX/ODP80486SX pins 2 & 3 closed pins 1 & 2, 3 & 4 closed 80486DX/DX2 pins 1 & 2 closed pins 1 & 2, 3 & 4 closed Pentium Overdrive pins 1 & 2 closed pins 1 & 2, 3 & 4 closed CPU SPEED CONFIGURATION Speed JP21 JP22 JP23 JP27 25MHz Closed Open Closed Open 33MHz Closed Closed Open Open 40MHz Open Open Closed Closed 50MHz Open Closed Open Closed 50iMHz Closed Open Closed Open 66iMHz Closed Closed Open Open VESA CLOCK CONFIGURATION Mode JP25 (SL2) JP26 (SL1) JP29 (SL3) JP30 (SL2 & SL3) Synchronous pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed Asynchronous pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed Note: If pins 1 & 2 are closed on JP30, JP25 must remain open. VESA BUS SPEED CONFIGURATION Mode JP19 JP20 Synchronous pins 2 & 3 closed pins 1 & 2 closed Asynchronous pins 1 & 2 closed pins 2 & 3 closed (40MHz/50MHz only) (50MHz only) VESA BUS CONFIGURATION (CIRRUS LOGIC VER. AB) Mode JP19 JP20 25MHz pins 2 & 3 closed pins 1 & 2 closed 33MHz pins 2 & 3 closed pins 1 & 2 closed 40MHz pins 1 & 2 closed pins 1 & 2 closed 50MHz pins 1 & 2 closed pins 1 & 2 closed 50iMHz pins 2 & 3 closed pins 1 & 2 closed 66iMHz pins 2 & 3 closed pins 1 & 2 closed Note: These settings are used only if a Cirrus Logic version AB video card is installed. VESA BUS CONFIGURATION (CIRRUS LOGIC VER. AC) Mode JP19 JP20 25MHz pins 2 & 3 closed pins 1 & 2 closed 33MHz pins 2 & 3 closed pins 1 & 2 closed 40MHz pins 1 & 2 closed pins 2 & 3 closed 50MHz pins 1 & 2 closed pins 2 & 3 closed 50iMHz pins 2 & 3 closed pins 1 & 2 closed 66iMHz pins 2 & 3 closed pins 1 & 2 closed Note: These settings are used only if a Cirrus Logic version AC video card is installed.