BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-8425UUD-A, MB-8433UUD-A, MB-8440UUD-A (VER. 1 & 2, ALL MODELS) Processor UMCU5S/CX486DX/AM486DX/(SL)AM486DX(SV8B)/(SL)AM486DX(SV8T)/80486DX/CX486DX2/AM486DX2/9SL)AM486DX2(SV8B)/ (SL)AM486DX2(SV8T)/80486DX2/CX486DX4/(SL)CX486DX4/AM486DX4/(SL)AM486DX4(SV8B)/(SL)AM486DX4(SV8T)/80486DX4/P24D/P24T/ CX5X86/AM5X86 Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Video Chip None Set Maximum 128MB Onboard Memory Maximum None Video Memory Cache 128/256/512KB BIOS Award Dimensions 220mm x 220mm I/O 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, Options serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 Green PC LED JP1 pins 14 & 15 Serial port 2 CN2 Reset switch JP1 pins12 & 13 Parallel port CN3 Green PC connector JP1 pins 17 & 18 Floppy drive CN4 IDE interface LED JP1 pins 20 & interface 21 IDE interface 1 CN5 Turbo switch JP1 pins 23 & 24 IDE interface 2 CN6 +12v ground JP1 pins 25 & 26 PS/2 mouse port CN7 External battery JP42 Speaker JP1 pins 1- 4 PS/2 mouse JP47 interface Power LED & JP1 pins 5 - 32-bit PCI slots PC1 - PC3 keylock 9 Turbo LED JP1 pins 10 & 11 USER CONFIGURABLE SETTINGS Function Label Position » Dallas DS12887A normal operation JP12 Pins 3 & 4 open Dallas DS12887A clear JP12 Pins 3 & 4 closed Flash BIOS voltage select 12v JP13 Pins 2 & 3 closed Flash BIOS voltage select 5v JP13 Pins 1 & 2 closed EPROM BIOS used JP13 Open » CMOS memory normal operation JP42 Pins 2 & 3 closed CMOS memory clear JP42 Pins 3 & 4 closed Battery type select external JP42 Closed Note: JP12 is only present if the Dallas DS12887A(BQ3287A)/OEC12C887A clock is installed. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x None None None 36 2MB (1) 512K x None None None 36 2MB (1) 256K x (1) 256K x None None 36 36 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 1M x 36 None None None 4MB (1) 512K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 512K x (1) 512K x None None 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB (1) 1M x 36 (1) 256K x None None 36 5MB (1) 512K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB (1) 256K x (1) 512K x (1) 512K x None 36 36 36 5MB (1) 256K x (1) 1M x 36 None None 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x None 36 36 6MB (1) 1M x 36 (1) 512K x None None 36 7MB (1) 256K x (1) 512K x (1) 512K x (1) 512K x 36 36 36 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 8MB (1) 2M x 36 None None None 8MB (1) 1M x 36 (1) 512K x (1) 512K x None 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 9MB (1) 256K x (1) 2M x 36 None None 36 10MB (1) 2M x 36 (1) 256K x (1) 256K x None 36 36 10MB (1) 2M x 36 (1) 512K x None None 36 10MB (1) 1M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 11MB (1) 2M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 12MB (1) 2M x 36 (1) 512K x (1) 512K x None 36 36 12MB (1) 2M x 36 (1) 1M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 12MB (1) 1M x 36 (1) 2M x 36 None None 13MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 36 14MB (1) 2M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 16MB (1) 4M x 36 None None None 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 17MB (1) 4M x 36 (1) 256K x None None 36 17MB (1) 256K x (1) 2M x 36 (1) 2M x 36 None 36 17MB (1) 256K x (1) 4M x 36 None None 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x None 36 36 18MB (1) 4M x 36 (1) 512K x None None 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 2M x 36 (1) 4M x 36 None None 25MB (1) 256K x (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36 26MB (1) 512K x (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 28MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 8M x 36 None None None 32MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 33MB (1) 8M x 36 (1) 256K x None None 36 33MB (1) 256K x (1) 8M x 36 None None 36 34MB (1) 8M x 36 (1) 256K x (1) 256K x None 36 36 34MB (1) 8M x 36 (1) 512K x None None 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 34MB (1) 512K x (1) 4M x 36 (1) 4M x 36 None 36 34MB (1) 512K x (1) 8M x 36 None None 36 35MB (1) 8M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 36MB (1) 8M x 36 (1) 512K x (1) 512K x None 36 36 36MB (1) 8M x 36 (1) 1M x 36 None None 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 None 38MB (1) 8M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 40MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 None 40MB (1) 8M x 36 (1) 2M x 36 None None 40MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 40MB (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 None 40MB (1) 2M x 36 (1) 8M x 36 None None 48MB (1) 8M x 36 (1) 4M x 36 None None 48MB (1) 4M x 36 (1) 8M x 36 None None 49MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 50MB (1) 512K x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 52MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 56MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 56MB (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 None 64MB (1) 8M x 36 (1) 8M x 36 None None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 65MB (1) 256K x (1) 8M x 36 (1) 8M x 36 None 36 66MB (1) 512K x (1) 8M x 36 (1) 8M x 36 None 36 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 None 72MB (1) 2M x 36 (1) 8M x 36 (1) 8M x 36 None 80MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 None 97MB (1) 256K x (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 36 98MB (1) 512K x (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 36 100MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 104MB (1) 2M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 112MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 Note: Not all configurations are shown. Any SIMM can be installed in any bank. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 None (1) 8K x 8 256KB (A) (4) 64K x 8 None (1) 32K x 8 256KB (B) (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 None (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP5 JP6 JP7 128KB Pins 1 & 2 Open Open closed 256KB (A) Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed 256KB (B) Pins 2 & 3 Pins 1 & 2 Open closed closed 512KB Pins 1 & 2 Pins 1 & 2, 3 & Pins 1 & 2, 3 & 4 closed 4 closed closed CPU SPEED SELECTION Speed JP15 JP16 JP17 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 Note: JP17 may not be present on all boards. CPU TYPE SELECTION Type JP10 JP11 JP31 JP45 JP46 UMC U5S 1 & 2 2 & 3 Open 2 & 3 Open CX486DX 2 & 3 1 & 2 Open 1 & 2 1 & 2, 4 & 5 AM486DX 1 & 2 1 & 2 Open 2 & 3 1 & 2, 4 & 5 (SL)AM486DX(SV8B) 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 (SL)AM486DX(SV8T) 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 80486DX 1 & 2 1 & 2 Open 2 & 3 1 & 2, 4 & 5 CX486DX2 2 & 3 1 & 2 Open 1 & 2 1 & 2, 4 & 5 AM486DX2 1 & 2 1 & 2 Open 2 & 3, 1 & 2, 5 & 6 4 & 5 (SL)AM486DX2(SV8B) 1 & 2 1 & 2 Open 1 & 2, 1 & 2, 4 & 5 4 & 5 (SL)AM486DX2(SV8T) 1 & 2 1 & 2 Open 1 & 2, 1 & 2, 4 & 5 4 & 5 80486DX2 1 & 2 1 & 2 Open 2 & 3 1 & 2, 4 & 5 CX486DX4 2 & 3 1 & 2 Open 1 & 2 1 & 2, 4 & 5 (SL)CX486DX4 2 & 3 1 & 2 Closed 1 & 2 1 & 2, 4 & 5 AM486DX4 1 & 2 1 & 2 Open 2 & 3 1 & 2, 4 & 5 (SL)AM486DX4(SV8B) 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 (SL)AM486DX4(SV8T) 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 80486DX4 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 P24D 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 P24T 1 & 2 1 & 2 Open 1 & 2 2 & 3, 4 & 5 CX5X86 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 AM5X86-P75 1 & 2 1 & 2 Open 1 & 2, 1 & 2, 4 & 5 4 & 5 AM5X86-P75+ 1 & 2 1 & 2 Open 1 & 2 1 & 2, 4 & 5 AM5X86-P90 1 & 2 1 & 2 Open 1 & 2, 1 & 2, 4 & 5 4 & 5 Note: Pins designated should be in the closed position. Ver. 2 does not support the UMC U5S. CPU TYPE SELECTION (CON’T) Type RN11 RN12 RN13 RN14 RN15 UMC U5S Installed Not Not Not Not installed installed installed installed CX486DX Not Installed Installed Not Not installed installed installed AM486DX Not Not Not Installed Installed installed installed installed (SL)AM486DX(SV8B) Not Not Not Installed Installed installed installed installed (SL)AM486DX(SV8T) Not Not Not Installed Installed installed installed installed 80486DX Not Not Not Installed Installed installed installed installed CX486DX2 Not Installed Installed Not Not installed installed installed AM486DX2 Not Not Not Installed Installed installed installed installed (SL)AM486DX2(SV8B) Not Not Not Installed Installed installed installed installed (SL)AM486DX2(SV8T) Not Not Not Installed Installed installed installed installed 80486DX2 Not Not Not Installed Installed installed installed installed CX486DX4 Not Installed Installed Not Not installed installed installed (SL)CX486DX4 Not Not Not Installed Installed installed installed installed AM486DX4 Not Not Not Installed Installed installed installed installed (SL)AM486DX4(SV8B) Not Not Not Installed Installed installed installed installed (SL)AM486DX4(SV8T) Not Not Not Installed Installed installed installed installed 80486DX4 Not Not Not Installed Installed installed installed installed P24D Not Not Not Installed Installed installed installed installed P24T Not Not Not Installed Installed installed installed installed CX5X86 Not Not Not Installed Installed installed installed installed AM5X86-P75 Not Not Not Installed Installed installed installed installed AM5X86-P75+ Not Not Not Installed Installed installed installed installed AM5X86-P90 Not Not Not Installed Installed installed installed installed Note: RN11 is not present on Ver. 2 Ver. 2 does not support the UMC U5S. CPU VOLTAGE SELECTION Voltage JP36 JP37 JP39 3.45v Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed 4v Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed 5v Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed DMA CHANNEL SELECTION Channel JP8 JP9 1 Pins 1 & 2 closed Pins 1 & 2 closed 3 Pins 2 & 3 closed Pins 2 & 3 closed