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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-8500 TUR (VER. 1)
Device Type Mainboard
Processor CX 6X86/AM K5/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard 128MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS AMI
Dimensions 285mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), cache slot, IR connector, USB
connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+---------------+------------|
| PS/2 mouse | J1 | Speaker | J16/pins 1 |
| interface | | | - 4 |
|--------------------+----------+---------------+------------|
| Floppy drive | J7 | Power LED & | J16/pins 5 |
| interface | | keylock | - 9 |
|--------------------+----------+---------------+------------|
| IDE interface 1 | J8 | Turbo LED | J16/pins |
| | | | 10 & 11 |
|--------------------+----------+---------------+------------|
| USB connector | J9 | Reset switch | J16/pins |
| | | | 12 & 13 |
|--------------------+----------+---------------+------------|
| Serial port 1 | J10 | Green PC LED | J16/pins |
| | | | 14 & 15 |
|--------------------+----------+---------------+------------|
| Serial port 2 | J11 | Green PC | J16/pins |
| | | connector | 17 & 18 |
|--------------------+----------+---------------+------------|
| Parallel port | J12 | IDE interface | J16/pins |
| | | LED | 20 & 21 |
|--------------------+----------+---------------+------------|
| IDE interface 2 | J13 | Turbo switch | J16/pins |
| | | | 23 & 24 |
|--------------------+----------+---------------+------------|
| Chassis fan power | J14 | 32-bit PCI | PC1 – PC3 |
| | | slots | |
|--------------------+----------+---------------+------------|
| IR connector | J15 | Cache slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J6 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP5 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP10 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP12 | Open |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP12 | Closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS select 5v | JP13 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS select 12v | JP13 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS select 0v or EPROM | JP13 | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 |
|----------------------------+-------------------------------|
| 8MB | (1) 1M x 64 |
|----------------------------+-------------------------------|
| 16MB | (1) 2M x 64 |
|----------------------------+-------------------------------|
| 32MB | (1) 4M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | SL1 | TAG |
|-------+--------------+----------------------+--------------|
| 256KB | (2) 32K x 32 | Not installed | Unidentified |
|-------+--------------+----------------------+--------------|
| 512KB | (2) 32K x 32 | 256KB module | Unidentified |
| | | installed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP11 |
|----------------------------+-------------------------------|
| 256KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier|JP1 |JP2 | JP6/ | JP6/ |
| | | | | | | |
| | | | | |pins 1 &|pins 3 &|
| | | | | | 2 | 4 |
|---------+-----------+----------+----+----+--------+--------|
| 120MHz | 50MHz | 2x |Open|Open| Closed | Closed |
|---------+-----------+----------+----+----+--------+--------|
| 133MHz | 55MHz | 2x |Open|Open| Open | Open |
|---------+-----------+----------+----+----+--------+--------|
| 150MHz | 60MHz | 2x |Open|Open| Closed | Open |
|---------+-----------+----------+----+----+--------+--------|
| 166MHz | 66MHz | 2x |Open|Open| Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier| JP1 |JP2 | JP6/ | JP6/ |
| | speed | | | | | |
| | | | | |pins 1 &|pins 3 &|
| | | | | | 2 | 4 |
|---------+---------+----------+------+----+--------+--------|
| 75MHz | 66MHz | 1x |Closed|Open| Open | Closed |
|---------+---------+----------+------+----+--------+--------|
| 75MHz | 50MHz | 1.5x | Open |Open| Closed | Closed |
|---------+---------+----------+------+----+--------+--------|
| 90MHz | 55MHz | 1.5x | Open |Open| Open | Open |
|---------+---------+----------+------+----+--------+--------|
| 90MHz | 60MHz | 1.5x | Open |Open| Closed | Open |
|---------+---------+----------+------+----+--------+--------|
| 100MHz | 66MHz | 1.5x | Open |Open| Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP1 | JP2 | JP6/ | JP6/ |
| speed | speed | | | | | |
| | | | | |pins 1 &|pins 3 &|
| | | | | | 2 | 4 |
|-------+---------+----------+------+------+--------+--------|
| 75MHz | 50MHz | 1.5x | Open | Open | Closed | Closed |
|-------+---------+----------+------+------+--------+--------|
| 90MHz | 60MHz | 1.5x | Open | Open | Closed | Open |
|-------+---------+----------+------+------+--------+--------|
|100MHz | 66MHz | 1.5x | Open | Open | Open | Closed |
|-------+---------+----------+------+------+--------+--------|
|120MHz | 60MHz | 2x |Closed| Open | Closed | Open |
|-------+---------+----------+------+------+--------+--------|
|133MHz | 66MHz | 2x |Closed| Open | Open | Closed |
|-------+---------+----------+------+------+--------+--------|
|150MHz | 60MHz | 2.5x |Closed|Closed| Closed | Open |
|-------+---------+----------+------+------+--------+--------|
|166MHz | 66MHz | 2.5x |Closed|Closed| Open | Closed |
|-------+---------+----------+------+------+--------+--------|
|180MHz | 60MHz | 3x | Open |Closed| Closed | Open |
|-------+---------+----------+------+------+--------+--------|
|200MHz | 66MHz | 3x | Open |Closed| Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP1 | JP2 | JP6/ | JP6/ |
| speed | speed | | | | | |
| | | | | |pins 1 &|pins 3 &|
| | | | | | 2 | 4 |
|-------+---------+----------+------+------+--------+--------|
|166MHz | 66MHz | 2.5x |Closed|Closed| Open | Closed |
|-------+---------+----------+------+------+--------+--------|
|180MHz | 60MHz | 3x | Open |Closed| Closed | Open |
|-------+---------+----------+------+------+--------+--------|
|200MHz | 66MHz | 3x | Open |Closed| Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP7 | JP14 | JP15 |
|-------------+--------+------------+------------------------|
| AMD | Open | Pins 1 & 2 | Pins 1 & 2, 3 & 4 |
| | | closed | closed |
|-------------+--------+------------+------------------------|
| Cyrix | Open | Pins 1 & 2 | Pins 1 & 2, 3 & 4 |
| | | closed | closed |
|-------------+--------+------------+------------------------|
| P54C/CQS/CT | Open | Pins 1 & 2 | Pins 1 & 2, 3 & 4 |
| | | closed | closed |
|-------------+--------+------------+------------------------|
| P55C/CT | Closed | Pins 2 & 3 | Open |
| | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP8 |
|-------------------------------+----------------------------|
| 3.4v | Closed |
|-------------------------------+----------------------------|
| 3.5v | Open |
+------------------------------------------------------------+