BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-8425/33/40/50UUC Processor CXM1/80486SX/UMCU5/CX486M6/AM486DX/80486DX/SL80486DX/CX487M7AM486DX2/SL AM486DX2/80486DX2/SL80486DX2/AM486DX4/SL AM486DX4 SL80486DX4/P24D/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ Speed 100(internal)MHz Chip Set Unidentified Max. 128MB Onboard DRAM Cache 128/256KB BIOS Award Dimensions 260mm x 220mm I/O Parallel port, serial ports (2), game port, 32-bit PCI slots (3), green Options PC connector, floppy drive interface, IDE interfaces (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery CN1 IDE interface LED D9 IDE interface 1 CN2 Green PC connector JP13 Parallel port CN3 Speaker JP15 pins 1 - 4 Game port CN4 Power LED & JP15 pins 5 - keylock 9 Floppy drive CN5 Turbo LED JP15 pins 10 interface - 11 Serial port 1 CN6 Reset switch JP15 pins 12 - 13 Serial port 2 CN7 Turbo switch JP15 pins 14 - 16 IDE interface 2 CN8 +5v ground JP15 pins 17 - 18 +5v ground D8 32-bit PCI slots PC1 - PC3 USER CONFIGURABLE SETTINGS Function Jumper Position » BIOS type select 12v flash JP3 pins 1 & 2 closed BIOS type select 5v flash JP3 pins 2 & 3 closed BIOS type select EPROM JP3 Open » CMOS memory normal operation JP6 pins 1 & 2 closed CMOS memory clear JP6 pins 1 & 2, 3 & 4 closed » Factory configured - do not JP9 N/A alter » Factory configured - do not JP10 N/A alter » Factory configured - do not JP11 N/A alter » Factory configured - do not JP12 N/A alter » Factory configured - do not JP20 N/A alter » Factory configured - do not JP21 N/A alter » Factory configured - do not JP46 N/A alter » Factory configured - do not JP49 N/A alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 256K x (1) 256K x NONE NONE 36 36 2MB (1) 512K x NONE NONE NONE 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 6MB (1) 512K x (1) 512K x (1) 512K x NONE 36 36 36 8MB (1) 512K x (1) 512K x (1) 512K x (1) 512K x 36 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 8M x 36 NONE NONE NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 NONE 128MB (1) 8M x 36 (1) 8M x 36 (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 (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 JP24 JP25 JP26 128KB Open pins 1 & 2 Open closed 256KB (A) pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 256KB (B) pins 1 & 2 pins 2 & 3 Open closed closed CPU TYPE CONFIGURATION Type JP27 JP28 JP29 JP30 JP31 CX M1 Closed Open Closed 3 & 4 Closed 80486SX Open Closed Closed Open Closed UMC-U5 Open Open Open 1 & 2 Open CX486M6 Open Open Open Open Open AM486DX Open Closed Closed 3 & 4 Closed 80486DX Open Closed Closed 3 & 4 Closed SL80486DX Open Closed Closed 3 & 4 Closed CX486M7 Open Open Open 3 & 4 Open AM486DX2 Open Closed Closed 3 & 4 Closed SL AM486DX2 Open Closed Closed 3 & 4 Closed WT SL AM486DX2 Open Closed Closed 3 & 4 Closed WB 80486DX2 Open Closed Closed 3 & 4 Closed SL80486DX2 Open Closed Closed 3 & 4 Closed AM486DX4 Open Closed Closed 3 & 4 Closed SL AM486DX4 Open Closed Closed 3 & 4 Closed WT SL AM486DX4 Open Closed Closed 3 & 4 Closed WB SL80486DX4 Open Closed Closed 3 & 4 Closed P24D Open Closed Closed 3 & 4 Closed Pentium Open Open Open 2 & 3 Open Overdrive Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP32 JP33 JP34 JP35 JP36 CX M1 2 & 3, 4 Open Open Open 1 & 2 & 5 80486SX 2 & 3, 4 Open Open Open 1 & 2 & 5 UMC-U5 Open Open Open Open Open CX486M6 1 & 2, 3 Open 1 & 2 2 & 3 2 & 3 & 4 AM486DX 2 & 3, 4 Open Open Open 1 & 2 & 5 80486DX 2 & 3, 4 Open Open Open 1 & 2 & 5 SL80486DX 2 & 3, 4 Open Open Open 1 & 2 & 5 CX486M7 1 & 2, 3 Open 1 & 2 2 & 3 2 & 3 & 4 AM486DX2 2 & 3, 4 Open Open Open 1 & 2 & 5 SL AM486DX2 WT 2 & 3, 4 2 & 3 Open Open 1 & 2 & 5 SL AM486DX2 WB 2 & 3, 4 2 & 3 Open Open 1 & 2 & 5 80486DX2 2 & 3, 4 Open Open Open 1 & 2 & 5 SL80486DX2 2 & 3, 4 Open Open Open 1 & 2 & 5 AM486DX4 2 & 3, 4 Open Open Open 1 & 2 & 5 SL AM486DX4 WT 2 & 3, 4 Open Open Open 1 & 2 & 5 SL AM486DX4 WB 2 & 3, 4 Open Open Open 1 & 2 & 5 SL80486DX4 2 & 3, 4 Open Open Open 1 & 2 & 5 P24D 2 & 3, 4 Open Open Open 1 & 2 & 5 Pentium 2 & 3, 4 Open 2 & 3 1 & 2 1 & 2 Overdrive & 5 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP37 JP38 JP39 JP40 JP41 JP42 CX M1 Open 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 80486SX 2 & 3 2 & 3 1 & 2 1 & 2 Open 2 & 3 UMC-U5 2 & 3 2 & 3 2 & 3 1 & 2 3 & 4 2 & 3 CX486M6 2 & 3 1 & 2 1 & 2 3 & 4 1 & 2 2 & 3 AM486DX 2 & 3 2 & 3 1 & 2 1 & 2 Open 1 & 2, 3 & 4 80486DX 2 & 3 2 & 3 1 & 2 1 & 2 Open 1 & 2, 3 & 4 SL80486DX 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 CX486M7 2 & 3 2 & 3 1 & 2 3 & 4 2 & 3 1 & 2, 3 & 4 AM486DX2 2 & 3 2 & 3 1 & 2 1 & 2 Open 1 & 2, 3 & 4 SL AM486DX2 WT 2 & 3 1 & 2 1 & 2 3 & 4 Open 1 & 2, 3 & 4 SL AM486DX2 WB 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 80486DX2 2 & 3 2 & 3 1 & 2 1 & 2 Open 1 & 2, 3 & 4 SL80486DX2 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 AM486DX4 2 & 3 2 & 3 1 & 2 1 & 2 Open 1 & 2, 3 & 4 SL AM486DX4 WT 2 & 3 1 & 2 1 & 2 3 & 4 Open 1 & 2, 3 & 4 SL AM486DX4 WB 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 SL80486DX4 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 P24D 2 & 3 2 & 3 1 & 2 3 & 4 Open 1 & 2, 3 & 4 Pentium 2 & 3 2 & 3 1 & 2 3 & 4, 1 & 2 1 & 2, Overdrive 5 & 6 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP22 JP23 Cyrix pins 2 & 3 closed pins 1 & 2 closed AMD pins 1 & 2 closed pins 1 & 2 closed UMC pins 1 & 2 closed pins 2 & 3 closed Intel pins 1 & 2 closed pins 1 & 2 closed CPU SPEED CONFIGURATION Speed JP5 JP7 JP8 20MHz Open Open Open 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 80iMHz Open Closed Closed 100iMHz Closed Closed Closed CPU VOLTAGE CONFIGURATION Voltage JP14 JP18 JP19 3.3v pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 4v pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed 5v Open pins 2 & 3 pins 2 & 3 closed closed DMA CONFIGURATION DMA JP47 JP48 DMA 1 pins 1 & 2 closed pins 1 & 2 closed DMA 3 pins 2 & 3 closed pins 2 & 3 closed