BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-1425/1433/1440/1450UHT VER. 3 & ABOVE Processor CX486M6/80486SX/CX486M7/UMC486/80486DX/80486DX2/80486DX4/ Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 128MB Onboard DRAM Cache 128/256/512/1024KB BIOS Award Dimensions 330mm x 218mm I/O 32-bit VESA local bus slots (2), 32-bit PCI slots (3) Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery JP8 Turbo switch JP15 (pins 14 - 15) Speaker JP15 (pins 1 - +5v ground JP15 (pins 17 - 4) 18) Power LED & JP15 (pins 5 - 32-bit PCI slots PC1 - PC3 keylock 9) Turbo LED JP15 (pins 10 - 32-bit VESA SL1 & SL2 11) local bus slots Reset switch JP15 (pins 12 - 13) USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP8 Open CMOS memory clear JP8 pins 3 & 4 closed Battery type select external JP8 Closed » Power good signal detect from JP10 pins 1 & 2 power supply closed Power good signal detect from JP10 pins 2 & 3 board closed » Password select normal JP16 Open Password select clear JP16 Closed » Factory configured - do not alter JP23 Open » Factory configured - do not alter JP24 Open » Factory configured - do not alter JP25 Open » Factory configured - do not alter JP30 Open » Factory configured - do not alter JP31 Open » Factory configured - do not alter JP32 Open » Hardware management select normal JP40 Open operation Hardware management select trigger JP40 Closed for SMM mode » Cyrix CPU clock speed select 2x JP43 Open Cyrix CPU clock speed select 1x JP43 Closed » CPU type select all JP60 Open CPU type select AMD 80486DX2-66/80 JP60 Closed only Note: The location of JP60 is unidentified. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 2MB (4) 512K x 9 NONE NONE 2MB NONE (1) 512K x 36 NONE 2MB NONE NONE (1) 512K x 36 4MB (4) 1M x 9 NONE NONE 4MB NONE (1) 512K x 36 (1) 512K x 36 4MB NONE (1) 1M x 36 NONE 4MB NONE NONE NONE 6MB (4) 1M x 9 (1) 512 x 36 NONE 6MB (4) 1M x 9 NONE (1) 512 x 36 8MB (4) 1M x 9 (1) 512K x 36 (1) 512K x 36 8MB (4) 1M x 9 (1) 1M x 36 NONE 8MB (4) 1M x 9 NONE (1) 1M x 36 8MB NONE (1) 1M x 36 (1) 1M x 36 8MB NONE (1) 2M x 36 NONE 8MB NONE NONE (1) 2M x 36 16MB (4) 4M x 9 NONE NONE 16MB NONE (1) 2M x 36 (1) 2M x 36 16MB NONE (1) 4M x 36 NONE 16MB NONE NONE (1) 4M x 36 24MB (4) 4M x 9 (1) 1M x 36 (1) 1M x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 24MB (4) 4M x 9 (1) 2M x 36 NONE 24MB (4) 4M x 9 NONE (1) 2M x 36 32MB (4) 4M x 9 (1) 2M x 36 (1) 2M x 36 32MB (4) 4M x 9 (1) 4M x 36 NONE 32MB (4) 4M x 9 NONE (1) 4M x 36 32MB (4) 8M x 9 NONE NONE 32MB NONE (1) 4M x 36 (1) 4M x 36 32MB NONE (1) 8M x 36 NONE 32MB NONE NONE (1) 8M x 36 64MB (4) 16M x 9 NONE NONE 64MB NONE (1) 8M x 36 (1) 8M x 36 128MB (4) 16M x 9 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 64K x 8 CACHE JUMPER CONFIGURATION Size JP22 JP34 JP35 JP36 128KB 1 & 2 Open 1 & 2 2 & 3 256KB 1 & 2, 3 & 4 Open 2 & 3 1 & 2 512KB 1 & 2, 3 & 4, 5 3 & 4 2 & 3 1 & 2 & 6 1MB 1 & 2, 3 & 4, 5 1 & 2, 3 & 2 & 3 1 & 2 & 6, 7 & 8 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP19 JP20 AMD pins 2 & 3 closed pins 1 & 2 closed Cyrix pins 1 & 2 closed pins 2 & 3 closed Intel pins 1 & 2 closed pins 1 & 2 closed CPU TYPE CONFIGURATION Type JP37 JP38 JP39 JP41 JP42 CX486M6 1 & 2, 3 1 & 2, 3 3 & 4 2 & 3 2 & 3 & 4 & 4 AM486 Open 2 & 3 1 & 2 1 & 2 Open 80486SX Open 2 & 3 1 & 2 Open Open CX486M7 1 & 2, 3 1 & 2, 3 3 & 4 2 & 3 2 & 3 & 4 & 4 UMC486 Open 2 & 3 1 & 2 1 & 2 Open SL80486 1 & 2, 3 1 & 2, 3 3 & 4 2 & 3 2 & 3 & 4 & 4 80486DX Open 1 & 2, 3 1 & 2 2 & 3 Open & 4 80486DX2 Open 1 & 2, 3 1 & 2 2 & 3 Open & 4 80486DX4 2 & 3, 4 1 & 2, 3 3 & 4 2 & 3 1 & 2, 3 & 5 & 4 & 4 Pentium 2 & 3, 4 1 & 2, 3 3 & 4, 5 2 & 3 1 & 2 Overdrive & 5 & 4 & 6 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP44 JP45 JP46 JP47 CX486M6 pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed AM486 Open pins 2 & 3 pins 3 & 4 Open closed closed 80486SX Open Open Open Open CX486M7 pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed UMC486 Open pins 2 & 3 pins 3 & 4 Open closed closed SL80486 Open pins 1 & 2 Open Open closed 80486DX Open Open Open Open 80486DX2 Open Open Open Open 80486DX4 pins 3 & 4 pins 1 & 2 Open Open closed closed Pentium pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 2 & 3 Overdrive closed closed closed closed CPU SPEED CONFIGURATION Speed JP33 25MHz pins 1 & 2 closed 33MHz pins 1 & 2, 3 & 4, 5 & 6 closed 40MHz pins 1 & 2, 3 & 4 closed 50iMHz pins 1 & 2 closed 50MHz pins 5 & 6 closed 66iMHz pins 1 & 2, 3 & 4, 5 & 6 closed 75iMHz pins 1 & 2 closed 100iMHz pins 1 & 2, 3 & 4, 5 & 6 closed CPU CLOCK CONFIGURATION Speed JP48 2x pins 2 & 3 closed 2.5x pins 1 & 2 closed 3x Open CPU VOLTAGE CONFIGURATION Voltage JP29 JP49 JP50 JP51 JP52 3.3v Open Open Open Closed Closed 5v pins 1 & 2, Closed Closed Open Open 3 & 4 closed VESA WAIT STATE CONFIGURATION Wait states JP53 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP54 <= 33MHz Open > 33MHz Closed