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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-1425/1433/1440/1450UHT VER. 2
Processor CX486M6/80486SX/CX486M7/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Award
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (2), 32-bit PCI slots (3)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+------------+------------------+------------|
| External | JP8 | Turbo switch | JP15 (pins |
| battery | | | 14 - 15) |
|---------------+------------+------------------+------------|
| Speaker | JP15 (pins | +5v ground | JP15 (pins |
| | 1 - 4) | | 17 - 18) |
|---------------+------------+------------------+------------|
| Power LED & | JP15 (pins | 32-bit PCI slots | PC1 - PC3 |
| keylock | 5 - 9) | | |
|---------------+------------+------------------+------------|
| Turbo LED | JP15 (pins | 32-bit VESA | SL1 & SL2 |
| | 10 - 11) | local bus slots | |
|---------------+------------+------------------+------------|
| 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 | JP10 | pins 1 & 2 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP10 | pins 2 & 3 |
| | board | | closed |
|---+----------------------------------+--------+------------|
| » | Password select normal | JP16 | Open |
|---+----------------------------------+--------+------------|
| | Password select clear | JP16 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP24 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP25 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP30 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP31 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP32 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Hardware management select | JP40 | Open |
| | normal operation | | |
|---+----------------------------------+--------+------------|
| | Hardware management select | JP40 | Closed |
| | trigger for SMM mode | | |
|---+----------------------------------+--------+------------|
| » | CPU type select all | JP60 | Open |
|---+----------------------------------+--------+------------|
| | CPU type select AMD | JP60 | Closed |
| | 80486DX2-66/80 only | | |
|------------------------------------------------------------|
| 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 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 4M x 9 | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 24MB | (4) 4M x 9 | NONE | (1) 2M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 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, | 1 & 2, 3 & | 2 & 3 | 1 & 2 |
| | 7 & 8 | 4 | | |
|------------------------------------------------------------|
| 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, | 1 & 2, | 3 & 4 | 2 & 3 | 2 & 3 |
| | 3 & 4 | 3 & 4 | | | |
|---------------+---------+--------+--------+-------+--------|
| 80486SX | Open | 2 & 3 | 1 & 2 | Open | Open |
|---------------+---------+--------+--------+-------+--------|
| CX486M7 | 1 & 2, | 1 & 2, | 3 & 4 | 2 & 3 | 2 & 3 |
| | 3 & 4 | 3 & 4 | | | |
|---------------+---------+--------+--------+-------+--------|
| SL80486 | 1 & 2, | 1 & 2, | 3 & 4 | 2 & 3 | 2 & 3 |
| | 3 & 4 | 3 & 4 | | | |
|---------------+---------+--------+--------+-------+--------|
| 80486DX | Open | 1 & 2, | 1 & 2 | 2 & 3 | Open |
| | | 3 & 4 | | | |
|---------------+---------+--------+--------+-------+--------|
| 80486DX2 | Open | 1 & 2, | 1 & 2 | 2 & 3 | Open |
| | | 3 & 4 | | | |
|---------------+---------+--------+--------+-------+--------|
| 80486DX4 | 2 & 3, | 1 & 2, | 3 & 4 | 2 & 3 | 1 & 2, |
| | 4 & 5 | 3 & 4 | | | 3 & 4 |
|---------------+---------+--------+--------+-------+--------|
| Pentium | 2 & 3, | 1 & 2, | 3 & 4, | 2 & 3 | 1 & 2 |
| Overdrive | 4 & 5 | 3 & 4 | 5 & 6 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP44 | JP45 | JP46 | JP47 |
|------------+-----------+-----------+-----------+-----------|
| CX486M6 | pins 2 & | pins 1 & | pins 1 & | pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|------------+-----------+-----------+-----------+-----------|
| 80486SX | Open | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| CX486M7 | pins 2 & | pins 1 & | pins 1 & | pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|------------+-----------+-----------+-----------+-----------|
| SL80486 | Open | pins 1 & | Open | Open |
| | | 2 closed | | |
|------------+-----------+-----------+-----------+-----------|
| 80486DX | Open | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 80486DX2 | Open | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 80486DX4 | pins 3 & | pins 1 & | Open | Open |
| | 4 closed | 2 closed | | |
|------------+-----------+-----------+-----------+-----------|
| Pentium | pins 1 & | pins 1 & | pins 2 & | pins 2 & |
| Overdrive | 2 closed | 2 closed | 3 closed | 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, | Closed | Closed | Open | Open |
| | 3 & 4 closed | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+