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# PIONEX TECHNOLOGIES, INC.
MB-8500TUC
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/180MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS AMI
Dimensions 290mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse 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 | Power LED & | J13 pins |
| interface | | keylock | 5 - 9 |
|------------------+----------+------------------+-----------|
| Floppy drive | J2 | Turbo LED | J13 pins |
| interface | | | 10 & 11 |
|------------------+----------+------------------+-----------|
| Serial port 1 | J5 | Reset switch | J13 pins |
| | | | 12 & 13 |
|------------------+----------+------------------+-----------|
| Serial port 2 | J6 | Green PC | J13 pins |
| | | connector | 17 & 18 |
|------------------+----------+------------------+-----------|
| PS/2 mouse port | J7 | IDE interface | J13 pins |
| | | LED | 20 & 21 |
|------------------+----------+------------------+-----------|
| Parallel port | J9 | +5v ground | J13 pins |
| | | | 25 & 26 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | J10 | IR connector | J14 |
| | | (optional) | |
|------------------+----------+------------------+-----------|
| IDE interface 2 | J11 | 32-bit PCI slots | PC1 - PC4 |
|------------------+----------+------------------+-----------|
| Chassis fan | J12 | Cache slot | SL1 |
| power | | | |
|------------------+----------+------------------+-----------|
| Speaker | J13 pins | USB connector | USB |
| | 1 - 4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 5v | JP10 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | EPROM or 0v flash BIOS used | JP10 | Open |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP11 | Open |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP11 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM 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) 1M x 36 | (2) 2M x 36 |
|--------------+-------------------------+-------------------|
| 32MB | (2) 4M x 36 | None |
|--------------+-------------------------+-------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|--------------+-------------------------+-------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|--------------+-------------------------+-------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|--------------+-------------------------+-------------------|
| 64MB | (2) 8M x 36 | None |
|--------------+-------------------------+-------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|--------------+-------------------------+-------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|--------------+-------------------------+-------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|--------------+-------------------------+-------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|--------------+-------------------------+-------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. Bank 2 uses DIMM |
| modules. The chip size and configuration is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | SL1 |
|--------+-----------+-----------+----------+----------------|
| 256KB | (2) 32K x | None | (1) 8K x | Not installed |
| | 32 | | 8 | |
|--------+-----------+-----------+----------+----------------|
| 512KB | (2) 32K x | (2) 32K x | (1) 32K | Not installed |
| (A) | 32 | 32 | x 8 | |
|--------+-----------+-----------+----------+----------------|
| 512KB | (2) 32K x | None | (1) 8K x | 256KB module |
| (B) | 32 | | 8 | installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP5 |
|-------------------------------+----------------------------|
| 256KB | Open |
|-------------------------------+----------------------------|
| 512KB (A) | Closed |
|-------------------------------+----------------------------|
| 512KB (B) | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | JP4 | JP7 |
| | speed | | | |
|-----------+--------+------------+-------------------+------|
| 100MHz | 50MHz | 2x | Pins 1 & 2, 3 & 4 | Open |
| | | | closed | |
|-----------+--------+------------+-------------------+------|
| 110MHz | 55MHz | 2x | Open | Open |
|-----------+--------+------------+-------------------+------|
| 120MHz | 60MHz | 2x | Pins 3 & 4 closed | Open |
|-----------+--------+------------+-------------------+------|
| 133MHz | 66MHz | 2x | Pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP7 |
| speed | speed | | | |
|---------+--------+------------+---------------+------------|
| 66MHz | 66MHz | 1x | Pins 1 & 2 | Pins 1 & 2 |
| | | | closed | closed |
|---------+--------+------------+---------------+------------|
| 75MHz | 50MHz | 1.5x | Pins 1 & 2, 3 | Open |
| | | | & 4 closed | |
|---------+--------+------------+---------------+------------|
| 83MHz | 55MHz | 1.5x | Open | Open |
|---------+--------+------------+---------------+------------|
| 90MHz | 60MHz | 1.5x | Pins 3 & 4 | Open |
| | | | closed | |
|---------+--------+------------+---------------+------------|
| 100MHz | 66MHz | 1.5x | Pins 1 & 2 | Open |
| | | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP4 | JP7 |
| speed | speed | | | |
|---------+--------+------------+--------------+-------------|
| 75MHz | 50MHz | 1.5x | Pins 1 & 2, | Open |
| | | | 3 & 4 closed | |
|---------+--------+------------+--------------+-------------|
| 90MHz | 60MHz | 1.5x | Pins 3 & 4 | Open |
| | | | closed | |
|---------+--------+------------+--------------+-------------|
| 100MHz | 66MHz | 1.5x | Pins 1 & 2 | Open |
| | | | closed | |
|---------+--------+------------+--------------+-------------|
| 120MHz | 60MHz | 2x | Pins 3 & 4 | Pins 1 & 2 |
| | | | closed | closed |
|---------+--------+------------+--------------+-------------|
| 133MHz | 66MHz | 2x | Pins 1 & 2 | Pins 1 & 2 |
| | | | closed | closed |
|---------+--------+------------+--------------+-------------|
| 150MHz | 60MHz | 2.5x | Pins 3 & 4 | Pins 1 & 2, |
| | | | closed | 3 & 4 |
| | | | | closed |
|---------+--------+------------+--------------+-------------|
| 166MHz | 66MHz | 2.5x | Pins 1 & 2 | Pins 1 & 2, |
| | | | closed | 3 & 4 |
| | | | | closed |
|---------+--------+------------+--------------+-------------|
| 180MHz | 60MHz | 3x | Pins 3 & 4 | Pins 3 & 4 |
| | | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP6 | JP9 | JP15 |
|----------------+--------------+-------------------+--------|
| Cyrix | 1 & 2, 4 & 5 | 2 & 3, 4 & 5, 7 & | Open |
| | | 8, 9 & 10 | |
|----------------+--------------+-------------------+--------|
| AMD | 1 & 2, 4 & 5 | 2 & 3, 4 & 5, 7 & | Open |
| | | 8, 9 & 10 | |
|----------------+--------------+-------------------+--------|
| Intel | 1 & 2, 4 & 5 | 2 & 3, 4 & 5, 7 & | Open |
| P54C/CQS/CT | | 8, 9 & 10 | |
|----------------+--------------+-------------------+--------|
| Intel P55C/CT | 2 & 3, 5 & 6 | 1 & 2, 3 & 4, 6 & | Closed |
| | | 7, 8 & 9 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP14 |
|-------------------------------+----------------------------|
| 3.4v | Closed |
|-------------------------------+----------------------------|
| 3.5 | Open |
+------------------------------------------------------------+