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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-8500TUD-A (VER. 1.0)
Device Type Mainboard
Processor CX 6X86/CX 6X86L/CX 686MX/AM K5/AM
K6/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/180/200/233/266MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 250mm x 220mm
I/O Options 32-bit PCI slots (5), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, PS/2 mouse
interface, serial ports (2), IR connector,
USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+----------------+------------|
| ATX power | ATX | CPU fan power | J14 |
| connector | | | |
|-------------------+----------+----------------+------------|
| PS/2 mouse | J2 | Speaker | J19/pins 1 |
| interface | | | - 4 |
|-------------------+----------+----------------+------------|
| Serial port 2 | J3 | Power LED & | J19/pins 5 |
| | | keylock | - 9 |
|-------------------+----------+----------------+------------|
| Parallel port | J6 | Soft off power | J19/pins |
| | | supply | 10 & 11 |
|-------------------+----------+----------------+------------|
| Floppy drive | J7 | Reset switch | J19/pins |
| interface | | | 12 & 13 |
|-------------------+----------+----------------+------------|
| Serial port 1 | J8 | Green PC | J19/pins |
| | | connector | 17 & 18 |
|-------------------+----------+----------------+------------|
| IDE interface 1 | J9 | IDE interface | J19/pins |
| | | LED | 20 & 21 |
|-------------------+----------+----------------+------------|
| IDE interface 2 | J10 | IR connector | J19/pins |
| | | | 22 - 26 |
|-------------------+----------+----------------+------------|
| PS/2 mouse port | J11 | 32-bit PCI | PC1 – PC5 |
| | | slots | |
|-------------------+----------+----------------+------------|
| USB connector | J12 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | CMOS memory normal operation | JP6 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | JP6 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | On board battery disabled | JP6 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 | Bank 3 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 16M x 64 | None |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 256MB | (1) 16M x 64 | (1) 16M x 64 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 256KB | (2) 32K x 32 | Unidentified |
|------------------+--------------------+--------------------|
| 512KB | (2) 64K x 32 | Unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|------------+--------------+------------+----------+--------|
| 150MHz | 60MHz | 2x | Closed | 1 & 2 |
|------------+--------------+------------+----------+--------|
| 166MHz | 66MHz | 2x | Open | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|------------+--------------+------------+----------+--------|
| 150MHz | 60MHz | 2x | Closed | 1 & 2 |
|------------+--------------+------------+----------+--------|
| 166MHz | 66MHz | 2x | Open | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|-----------+-------------+------------+--------+------------|
| 150MHz | 60MHz | 2x | Closed | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 166MHz | 66MHz | 2x | Open | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 166MHz | 60MHz | 2.5x | Closed | 1 & 2, 3 & |
| | | | | 4 |
|-----------+-------------+------------+--------+------------|
| 200MHz | 66MHz | 2.5x | Open | 1 & 2, 3 & |
| | | | | 4 |
|-----------+-------------+------------+--------+------------|
| 200MHz | 60MHz | 3x | Closed | 3 & 4 |
|-----------+-------------+------------+--------+------------|
| 233MHz | 66MHz | 3x | Open | 3 & 4 |
|-----------+-------------+------------+--------+------------|
| 266MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|-----------+-------------+------------+--------+------------|
| 90MHz | 60MHz | 1.5x | Closed | Open |
|-----------+-------------+------------+--------+------------|
| 100MHz | 66MHz | 1.5x | Open | Open |
|-----------+-------------+------------+--------+------------|
| 120MHz | 60MHz | 2x | Closed | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 133MHz | 66MHz | 2x | Open | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 2, 3 & |
| | | | | 4 |
|-----------+-------------+------------+--------+------------|
| 200MHz | 66MHz | 3x | Open | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|-----------+-------------+------------+------+--------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 2, 3 & 4 |
|-----------+-------------+------------+------+--------------|
| 200MHz | 66MHz | 3x | Open | 3 & 4 |
|-----------+-------------+------------+------+--------------|
| 233MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|-----------+-------------+------------+--------+------------|
| 90MHz | 60MHz | 1.5x | Closed | Open |
|-----------+-------------+------------+--------+------------|
| 100MHz | 66MHz | 1.5x | Open | Open |
|-----------+-------------+------------+--------+------------|
| 120MHz | 60MHz | 2x | Closed | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 133MHz | 66MHz | 2x | Open | 1 & 2 |
|-----------+-------------+------------+--------+------------|
| 150MHz | 60MHz | 2.5x | Closed | 1 & 2, 3 & |
| | | | | 4 |
|-----------+-------------+------------+--------+------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 2, 3 & |
| | | | | 4 |
|-----------+-------------+------------+--------+------------|
| 200MHz | 66MHz | 3x | Open | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP2 | JP13 |
|-----------+-------------+------------+------+--------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 2, 3 & 4 |
|-----------+-------------+------------+------+--------------|
| 200MHz | 66MHz | 3x | Open | 3 & 4 |
|-----------+-------------+------------+------+--------------|
| 233MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | JP16 |
|-------------------------------+----------------------------|
| 3.5v | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| Voltage | V core | JP16 |
|--------------------+------------------+--------------------|
| 3.4v | 2.8v | Open |
|--------------------+------------------+--------------------|
| 3.4v | 2.9v | Pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 3.4v | 3.2v | Pins 3 & 4 closed |
+------------------------------------------------------------+