BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-8433AEP Processor 80486SX/CX486M7/CX486DX/AM486DX/AM486DX PLUS/UMC U5/80486DX/ CX486DX2/AM486DX2/AM486DX2 PLUS/80486DX2/AM486DX4/80486DX4/ SL Pentium Overdrive/Cyrix M1 Processor 25/33/40/66(internal)/75(internal)/80(internal)/100(internal)/120(internal)MHz Speed Chip Set AMD Max. 64MB Onboard DRAM Cache 128/256/512KB BIOS AMI Dimensions 220mm x 210mm I/O PS/2 mouse port, parallel port, serial ports (2), 32-bit PCI slots (3), floppy Options drive interface, IDE interfaces (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Floppy drive J4 Turbo LED J12 (pins 10 & interface 11) IDE interface J5 Reset switch J12 (pins 12 & (primary) 13) Serial port 2 J6 Green PC J12 (pins 17 - connector 19) IDE interface J8 IDE interface J12 (pins 20 - (secondary) LED 22) Serial port 1 J9 Turbo switch J12 (pins 23 & 24) Parallel port J10 Chassis fan JP2 power External battery J11 32-bit PCI slots PCI1 - PCI3 Speaker J12 (pins 1 - PS/2 mouse port S1 4) Power LED & keylock J12 (pins 5 - 9) USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J11 pins 2 & 3 closed CMOS memory clear J11 pins 3 & 4 closed » Factory configured - do not J13 N/A alter Flash BIOS voltage select 5v JP22 pins 2 & 3 closed Flash BIOS voltage select 12v JP22 pins 1 & 2 closed Flash BIOS EPROM JP22 Open » Internal battery enabled JP25 Closed Internal battery disabled JP25 Open » Power good signal detect from JP26 pins 1 & 2 power supply closed Power good signal detect from JP26 pins 2 & 3 board closed » Factory configured - do not U2 N/A alter » Factory configured - do not U3 N/A alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 1M x 36 (1) 1M x 36 NONE NONE 2MB NONE NONE (1) 1M x 36 (1) 1M x 36 2MB (1) 2M x 36 NONE NONE NONE 4MB (1) 2M x 36 (1) 2M x 36 NONE NONE 4MB NONE NONE (1) 2M x 36 (1) 2M x 36 4MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 4MB (1) 4M x 36 NONE NONE NONE 6MB (1) 2M x 36 (1) 4M x 36 NONE NONE 6MB NONE NONE (1) 2M x 36 (1) 4M x 36 8MB (1) 4M x 36 (1) 4M x 36 NONE NONE 8MB NONE NONE (1) 4M x 36 (1) 4M x 36 8MB (1) 8M x 36 NONE NONE NONE 10MB (1) 2M x 36 (1) 8M x 36 NONE NONE 10MB NONE NONE (1) 2M x 36 (1) 8M x 36 12MB (1) 4M x 36 (1) 8M x 36 NONE NONE 12MB NONE NONE (1) 4M x 36 (1) 8M x 36 16MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 16MB (1) 8M x 36 (1) 8M x 36 NONE NONE 16MB NONE NONE (1) 8M x 36 (1) 8M x 36 16MB (1) 16M x 36 NONE NONE NONE 18MB (1) 2M x 36 (1) 16M x 36 NONE NONE 18MB NONE NONE (1) 2M x 36 (1) 16M x 36 20MB (1) 4M x 36 (1) 16M x 36 NONE NONE 20MB NONE NONE (1) 4M x 36 (1) 16M x 36 24MB (1) 8M x 36 (1) 16M x 36 NONE NONE 24MB NONE NONE (1) 8M x 36 (1) 16M x 36 32MB (1) 32M x 36 NONE NONE NONE 33MB (1) 1M x 36 (1) 32M x 36 NONE NONE 33MB NONE NONE (1) 1M x 36 (1) 32M x 36 34MB (1) 2M x 36 (1) 32M x 36 NONE NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 34MB NONE NONE (1) 2M x 36 (1) 32M x 36 36MB (1) 4M x 36 (1) 32M x 36 NONE NONE 36MB NONE NONE (1) 4M x 36 (1) 32M x 36 40MB (1) 8M x 36 (1) 32M x 36 NONE NONE 40MB NONE NONE (1) 8M x 36 (1) 32M x 36 48MB (1) 16M x 36 (1) 32M x 36 NONE NONE 48MB NONE NONE (1) 16M x 36 (1) 32M x 36 64MB (1) 32M x 36 (1) 32M x 36 NONE NONE 64MB NONE NONE (1) 32M x 36 (1) 32M x 36 CACHE CONFIGURATION Size Bank 0 TAG 128KB (4) 32K x 8 (1) 8K x 8 256KB (A) (4) 64K x 8 (1) 16K x 8 256KB (B) (4) 64K x 8 (1) 32K x 8 512KB (4) 64K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP20 JP21 128KB pins 1 & 2 closed Open 256KB (A) Open pins 1 & 2 closed 256KB (B) pins 1 & 2 closed pins 2 & 3 closed 512KB pins 2 & 3 closed pins 2 & 3 closed CPU TYPE CONFIGURATION Type JP5 JP6 JP7 JP8 80486SX 5 & 6 Open 2 & 3, 4 & Open 5 CX486DX 1 & 2, 4 & Open 1 & 2, 4 & 1 & 2 5 5 AM486DX 1 & 2, 4 & Open 2 & 3, 4 & Open 5 5 AM486DX PLUS WB 1 & 2, 4 & Open 1 & 2 Open 5 AM486DX PLUS WT 1 & 2, 4 & 5 & 6 1 & 2, 4 & Open 5 5 U5 Open Open 4 & 5 Open 80486DX 1 & 2, 4 & Open 2 & 3, 4 & Open 5 5 CX486DX2 1 & 2, 4 & 1 & 2 1 & 2, 4 & 1 & 2, 3 & 4 5 5 AM486DX2 1 & 2, 4 & 4 & 5 2 & 3, 4 & Open 5 5 AM486DX2 PLUS WB 1 & 2, 4 & 3 & 4 1 & 2 Open 5 AM486DX2 PLUS WT 1 & 2, 4 & 3 & 4, 5 & 1 & 2, 4 & Open 5 6 5 80486DX2 1 & 2, 4 & 4 & 5 2 & 3, 4 & Open 5 5 CX486DX4 1 & 2, 4 & Open 1 & 2, 4 & 1 & 2 5 5 AM486DX4 1 & 2, 4 & Open 2 & 3, 4 & Open 5 5 AM486DX4 PLUS WB 1 & 2, 4 & Open 1 & 2 Open 5 AM486DX2 PLUS WT 1 & 2, 4 & 5 & 6 1 & 2, 4 & Open 5 5 80486DX4 1 & 2, 4 & Open 1 & 2, 4 & Open 5 5 CPU TYPE CONFIGURATION (CON’T) Type JP5 JP6 JP7 JP8 P24D 1 & 2, 4 & Open 1 & 2 Open 5 M1 1 & 2, 4 & Open 1 & 2, 4 & Open 5 5 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type RN6 RN7 RN8 RN9 80486SX Not Installed Not Installed installed installed CX486DX Not Not Installed Not installed installed installed AM486DX Not Installed Not Installed installed installed AM486DX Not Installed Not Installed PLUS WB installed installed AM486DX Not Installed Not 1 - 4 PLUS WT installed installed installed only U5 Installed Not Not Not installed installed installed 80486DX Not Installed Not Installed installed installed CX486DX2 Not Not Installed Not installed installed installed AM486DX2 Not Installed Not Installed installed installed AM486DX2 Not Installed Not Installed PLUS WB installed installed AM486DX2 Not Installed Not 1 - 4 PLUS WT installed installed installed only 80486DX2 Not Installed Not Installed installed installed CX486DX4 Not Not Installed Not installed installed installed AM486DX4 Not Installed Not Installed installed installed AM486DX4 Not Installed Not Installed PLUS WB installed installed AM486DX4 Not Installed Not 1 - 4 PLUS WT installed installed installed only 80486DX4 Not Installed Not Installed installed installed P24D Not Installed Not Installed installed installed M1 Not Installed Not 1 - 4 installed installed installed only Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP11 JP16 JP18 JP19 25MHz pins 1 & 2 Open Open Open closed 33MHz pins 1 & 2 Open Closed Closed closed 40MHz pins 2 & 3 Closed Open Closed closed 66iMHz pins 1 & 2 Open Closed Closed closed 75iMHz pins 1 & 2 Open Open Open closed 80iMHz pins 2 & 3 Closed Open Closed closed 100iMHz pins 1 & 2 Open Closed Closed closed 120iMHz pins 2 & 3 Closed Open Closed closed CPU VOLTAGE CONFIGURATION Voltage JP1 JP3 JP4 3.45v pins 2 & 3 Open Open closed 4v pins 1 & 2 Open Open closed 5v pins 2 & 3 Closed Closed closed DMA CONFIGURATION DMA JP9 JP10 DMA 1 pins 1 & 2 closed pins 2 & 3 closed DMA 3 pins 2 & 3 closed pins 1 & 2 closed