BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-1425/1433/1440/1450UHT VER. 3 & ABOVE
| 
 Processor  | 
 CX486M6/80486SX/CX486M7/UMC486/80486DX/80486DX2/80486DX4/ Pentium Overdrive  | 
| 
 Processor Speed  | 
 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Max. Onboard DRAM  | 
 128MB  | 
| 
 Cache  | 
 128/256/512/1024KB  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 330mm x 218mm  | 
| 
 I/O Options  | 
 32-bit VESA local bus slots (2), 32-bit PCI slots (3)  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External battery  | 
 JP8  | 
 Turbo switch  | 
 JP15 (pins 14 - 15)  | 
| 
 Speaker  | 
 JP15 (pins 1 - 4)  | 
 +5v ground  | 
 JP15 (pins 17 - 18)  | 
| 
 Power LED & keylock  | 
 JP15 (pins 5 - 9)  | 
 32-bit PCI slots  | 
 PC1 - PC3  | 
| 
 Turbo LED  | 
 JP15 (pins 10 - 11)  | 
 32-bit VESA local bus slots  | 
 SL1 & SL2  | 
| 
 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 power supply  | 
 JP10  | 
 pins 1 & 2 closed  | 
| 
 Power good signal detect from board  | 
 JP10  | 
 pins 2 & 3 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 operation  | 
 JP40  | 
 Open  | 
| 
 Hardware management select trigger for SMM mode  | 
 JP40  | 
 Closed  | |
| 
 »  | 
 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 only  | 
 JP60  | 
 Closed  | |
| 
 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 & 6  | 
 3 & 4  | 
 2 & 3  | 
 1 & 2  | 
| 
 1MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8  | 
 1 & 2, 3 & 4  | 
 2 & 3  | 
 1 & 2  | 
| 
 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 & 4  | 
 1 & 2, 3 & 4  | 
 3 & 4  | 
 2 & 3  | 
 2 & 3  | 
| 
 AM486  | 
 Open  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 80486SX  | 
 Open  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
 Open  | 
| 
 CX486M7  | 
 1 & 2, 3 & 4  | 
 1 & 2, 3 & 4  | 
 3 & 4  | 
 2 & 3  | 
 2 & 3  | 
| 
 UMC486  | 
 Open  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 SL80486  | 
 1 & 2, 3 & 4  | 
 1 & 2, 3 & 4  | 
 3 & 4  | 
 2 & 3  | 
 2 & 3  | 
| 
 80486DX  | 
 Open  | 
 1 & 2, 3 & 4  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 80486DX2  | 
 Open  | 
 1 & 2, 3 & 4  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 80486DX4  | 
 2 & 3, 4 & 5  | 
 1 & 2, 3 & 4  | 
 3 & 4  | 
 2 & 3  | 
 1 & 2, 3 & 4  | 
| 
 Pentium Overdrive  | 
 2 & 3, 4 & 5  | 
 1 & 2, 3 & 4  | 
 3 & 4, 5 & 6  | 
 2 & 3  | 
 1 & 2  | 
| 
 Note: Pins designated should be in the closed position.  | |||||
| 
 CPU TYPE CONFIGURATION  | ||||
| 
 Type  | 
 JP44  | 
 JP45  | 
 JP46  | 
 JP47  | 
| 
 CX486M6  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 AM486  | 
 Open  | 
 pins 2 & 3 closed  | 
 pins 3 & 4 closed  | 
 Open  | 
| 
 80486SX  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 CX486M7  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 UMC486  | 
 Open  | 
 pins 2 & 3 closed  | 
 pins 3 & 4 closed  | 
 Open  | 
| 
 SL80486  | 
 Open  | 
 pins 1 & 2 closed  | 
 Open  | 
 Open  | 
| 
 80486DX  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 80486DX2  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 80486DX4  | 
 pins 3 & 4 closed  | 
 pins 1 & 2 closed  | 
 Open  | 
 Open  | 
| 
 Pentium Overdrive  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 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, 3 & 4 closed  | 
 Closed  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 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  |