BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-1425/33/40/50 UIV Processor 80486SX/CX486M6/CX486M7/AMD486DXL/80486DX/80486DX2/80486DX4/ P24D/Pentium Overdrive Processor 25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Max. 64MB Onboard DRAM Cache 64/128/256KB BIOS AMI/Award Dimensions 254mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery JP8 Turbo switch JP15E Speaker JP15A +5vDC JP15F Power LED & keylock JP15B Green PC LED JP24 Turbo LED JP15C Green PC connector JP25 Reset switch JP15D 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JP8 pins 2 & 3 closed CMOS memory clear JP8 pins 3 & 4 closed » Factory configured - do not JP31 Open alter » Factory configured - do not JP32 Open alter DRAM CONFIGURATION Size Bank 0/2 Bank 1/3 Bank 2 1MB NONE NONE (4) 256K x 9 1MB (1) 256K x 36 NONE NONE 1MB NONE (1) 256K x 36 NONE 2MB (1) 256K x 36 NONE (4) 256K x 9 2MB NONE (1) 256K x 36 (4) 256K x 9 2MB (1) 256K x 36 (1) 256K x 36 NONE 2MB (1) 512K x 36 NONE NONE 2MB NONE (1) 512K x 36 NONE 3MB (1) 256K x 36 (1) 256K x 36 (4) 256K x 9 3MB NONE (1) 512K x 36 (4) 256K x 9 3MB (1) 256K x 36 (1) 512K x 36 NONE 3MB (1) 512K x 36 (1) 256K x 36 NONE 4MB (1) 256K x 36 (1) 512K x 36 (4) 256K x 9 4MB NONE NONE (4) 1M x 9 4MB (1) 512K x 36 (1) 512K x 36 NONE 4MB (1) 1M x 36 NONE NONE 4MB NONE (1) 1M x 36 NONE 5MB (1) 1M x 36 NONE (4) 256K x 9 5MB NONE (1) 1M x 36 (4) 256K x 9 5MB (1) 256K x 36 NONE (4) 1M x 9 5MB NONE (1) 256K x 36 (4) 1M x 9 5MB (1) 256K x 36 (1) 1M x 36 NONE 5MB (1) 1M x 36 (1) 256K x 36 NONE 6MB NONE (1) 512K x 36 (4) 1M x 9 6MB (1) 1M x 36 (1) 512K x 36 NONE 6MB (1) 512K x 36 (1) 1M x 36 NONE 7MB (1) 1M x 36 (1) 512K x 36 (4) 256K x 9 7MB (1) 256K x 36 (1) 512K x 36 (4) 1M x 9 8MB (1) 1M x 36 NONE (4) 1M x 9 8MB NONE (1) 1M x 36 (4) 1M x 9 8MB (1) 1M x 36 (1) 1M x 36 NONE 8MB (1) 2M x 36 NONE NONE 8MB NONE (1) 2M x 36 NONE 9MB (1) 1M x 36 (1) 1M x 36 (4) 256K x 9 9MB (1) 1M x 36 (1) 256K x 36 (4) 1M x 9 9MB (1) 256K x 36 (1) 1M x 36 (4) 1M x 9 10MB (1) 1M x 36 (1) 512K x 36 (4) 1M x 9 DRAM CONFIGURATION (CON’T) Size Bank 0/2 Bank 1/3 Bank 2 12MB (1) 1M x 36 (1) 1M x 36 (4) 1M x 9 12MB NONE (1) 2M x 36 (4) 1M x 9 16MB (1) 1M x 36 (1) 2M x 36 (4) 1M x 9 16MB (1) 2M x 36 (1) 1M x 36 (4) 1M x 9 16MB NONE NONE (4) 4M x 9 16MB (1) 4M x 36 NONE NONE 16MB NONE (1) 4M x 36 NONE 17MB (1) 4M x 36 NONE (4) 256K x 9 17MB NONE (1) 4M x 36 (4) 256K x 9 17MB (1) 256K x 36 NONE (4) 4M x 9 17MB NONE (1) 256K x 36 (4) 4M x 9 18MB (1) 256K x 36 (1) 4M x 36 (4) 256K x 9 18MB (1) 4M x 36 (1) 256K x 36 (4) 256K x 9 19MB (1) 4M x 36 (1) 512K x 36 (4) 256K x 9 20MB (1) 4M x 36 NONE (4) 1M x 9 20MB (1) 4M x 36 NONE (4) 4M x 9 20MB NONE (1) 1M x 36 (4) 4M x 9 21MB (1) 1M x 36 (1) 4M x 36 (4) 256K x 9 21MB (1) 4M x 36 (1) 1M x 36 (4) 256K x 9 24MB (1) 1M x 36 (1) 4M x 36 (4) 1M x 9 24MB (1) 4M x 36 (1) 1M x 36 (4) 1M x 9 32MB (1) 4M x 36 NONE (4) 4M x 9 32MB NONE (1) 4M x 36 (4) 4M x 9 32MB (1) 4M x 36 (1) 4M x 36 NONE 32MB (1) 8M x 36 NONE NONE 32MB NONE (1) 8M x 36 NONE 33MB (1) 8M x 36 NONE (4) 256K x 9 33MB NONE (1) 8M x 36 (4) 256K x 9 33MB (1) 4M x 36 (1) 4M x 36 (4) 256K x 9 33MB (1) 4M x 36 (1) 256K x 36 (4) 4M x 9 33MB (1) 256K x 36 (1) 4M x 36 (4) 4M x 9 34MB (1) 4M x 36 (1) 512K x 36 (4) 4M x 9 36MB (1) 4M x 36 (1) 1M x 36 (4) 4M x 9 36MB (1) 1M x 36 (1) 4M x 36 (4) 4M x 9 48MB NONE (1) 8M x 36 (4) 4M x 9 48MB (1) 4M x 36 (1) 4M x 36 (4) 4M x 9 48MB (1) 4M x 36 (1) 4M x 36 (4) 4M x 9 48MB NONE (1) 8M x 36 (4) 4M x 9 48MB (1) 4M x 36 (1) 8M x 36 NONE 48MB (1) 8M x 36 (1) 4M x 36 NONE 64MB (1) 8M x 36 (1) 8M x 36 NONE 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 (A) (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 256KB (B) (4) 64K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP7 JP9 JP10 JP33 64KB Open Open pins 2 & 3 Open closed 128KB Open pins 1 & 2 pins 1 & 2 Closed closed closed 256KB (A) Closed pins 2 & 3 pins 2 & 3 Closed closed closed 256KB(B) Closed pins 1 & 2, 3 pins 1 & 2 Closed & 4 closed closed CPU TYPE CONFIGURATION Type JP11 JP12 JP13 UMC486 2 & 3 2 & 3 2 & 3 CX486M6 1 & 2, 3 & 4, 5 1 & 2, 3 & 4, 5 2 & 3 & 6 & 6 80486SX Open 2 & 3 2 & 3 CX486M7 1 & 2, 3 & 4, 5 1 & 2, 3 & 4, 5 1 & 2, 3 & 4 & 6 & 6 AMD486DXL 2 & 3 2 & 3 1 & 2, 3 & 4 80486DX Open 2 & 3 1 & 2, 3 & 4 SL80486DX 1 & 2 1 & 2 1 & 2, 3 & 4 80486DX4 1 & 2 1 & 2 1 & 2, 3 & 4 P24D 1 & 2, 4 & 5 1 & 2, 4 & 5 1 & 2, 3 & 4 Pentium Overdrive 1 & 2 1 & 2 1 & 2, 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP17 JP18 JP19 JP35 UMC486 3 & 4 1 & 2 Open Closed CX486M6 Open 2 & 3, 4 & 2 & 3, 4 & Open 5 5 80486SX Open Open Open Closed CX486M7 1 & 2 2 & 3, 4 & 2 & 3 Open 5 AMD486DXL 1 & 2, 3 & 1 & 2 Open Closed 4 80486DX 1 & 2 Open Open Closed SL80486DX 1 & 2 5 & 6 1 & 2, 3 & Open 4 80486DX4 1 & 2 5 & 6 1 & 2, 3 & Open 4 P24D 1 & 2 3 & 4, 5 & 1 & 2, 3 & Open 6 4 Pentium 2 & 3 5 & 6 1 & 2, 3 & Open Overdrive 4 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP4 JP5 JP6 25MHz Open Open Closed 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Open Closed 50MHz Closed Open Open 66iMHz Closed Closed Closed 75iMHz Open Open Closed 100iMHz Closed Closed Closed CPU VOLTAGE CONFIGURATION Voltage JP14 JP16 JP27 3.45v (DX4) pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 5.0v pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed VESA WAIT STATE CONFIGURATION Wait states JP22 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP21 <= 33MHz Open > 33MHz Closed