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# TMC RESEARCH CORPORATION
AI5TH (VER. 1.0E)
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, serial ports (2), cache slot,
IR connector, USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+---------------+------------|
| USB connector 1 | J6 | Speaker | J20/pins 1 |
| | | | & 4 |
|--------------------+----------+---------------+------------|
| Serial port 1 | J7 | Green PC | J20/pins 6 |
| | | connector | & 16 |
|--------------------+----------+---------------+------------|
| USB connector 2 | J8 | Turbo LED | J20/pins 8 |
| | | | & 18 |
|--------------------+----------+---------------+------------|
| Serial port 2 | J9 | Reset switch | J20/pins 9 |
| | | | & 19 |
|--------------------+----------+---------------+------------|
| Floppy drive | J12 | IDE interface | J20/pins |
| interface | | LED | 10 & 20 |
|--------------------+----------+---------------+------------|
| Parallel port | J13 | Power LED & | J20/pins |
| | | keylock | 11 & 15 |
|--------------------+----------+---------------+------------|
| IDE interface 1 | J15 | 32-bit PCI | PC1 – PC4 |
| | | slots | |
|--------------------+----------+---------------+------------|
| IDE interface 2 | J16 | Cache slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| » | Flash BIOS voltage select 5v | JP7 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP7 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | PCI CLK select /4 | JP13 | Closed |
|---+-------------------------------+-------+----------------|
| | PCI CLK select /3 | JP13 | Open |
|---+-------------------------------+-------+----------------|
| » | CMOS memory normal operation | JP17 | Open |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | JP17 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1Mx 32 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2Mx 32 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1Mx 32 | (2) 1Mx 32 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2Mx 32 | (2) 1Mx 32 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4Mx 32 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2Mx 32 | (2) 2Mx 32 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4Mx 32 | (2) 1Mx 32 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4Mx 32 | (2) 2Mx 32 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8Mx 32 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4Mx 32 | (2) 4Mx 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8Mx 32 | (2) 1Mx 32 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8Mx 32 | (2) 2Mx 32 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8Mx 32 | (2) 4Mx 32 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8Mx 32 | (2) 8Mx 32 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16Mx 32 | None |
|------------------+--------------------+--------------------|
| 136MB | (2) 16Mx 32 | (2) 1Mx 32 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16Mx 32 | (2) 2Mx 32 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16Mx 32 | (2) 8Mx 32 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16Mx 32 | (2) 16Mx 32 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: The cache configuration is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP8 | JP9 | JP10 | JP11 |JP12|
| speed | speed | | | | | | |
|-------+--------+----------+------+------+------+------+----|
|120MHz | 50MHz | 2x |Closed|Closed|Closed|Closed|Open|
|-------+--------+----------+------+------+------+------+----|
|133MHz | 55MHz | 2x |Closed| Open | Open |Closed|Open|
|-------+--------+----------+------+------+------+------+----|
|150MHz | 60MHz | 2x |Closed| Open |Closed|Closed|Open|
|-------+--------+----------+------+------+------+------+----|
|166MHz | 66MHz | 2x | Open |Closed| Open |Closed|Open|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier| JP8 | JP9 | JP10 | JP11 | JP12 |
| speed |speed | | | | | | |
|-------+------+----------+------+------+------+------+------|
| 75MHz |50MHz | 1.5x |Closed|Closed|Closed| Open | Open |
|-------+------+----------+------+------+------+------+------|
| 90MHz |60MHz | 1.5x |Closed| Open |Closed| Open | Open |
|-------+------+----------+------+------+------+------+------|
|100MHz |66MHz | 1.5x | Open |Closed| Open | Open | Open |
|-------+------+----------+------+------+------+------+------|
|120MHz |60MHz | 1.5x |Closed| Open |Closed| Open | Open |
|-------+------+----------+------+------+------+------+------|
|133MHz |66MHz | 1.5x | Open |Closed| Open | Open | Open |
|-------+------+----------+------+------+------+------+------|
|150MHz |60MHz | 2.5x |Closed| Open |Closed|Closed|Closed|
|-------+------+----------+------+------+------+------+------|
|166MHz |66MHz | 2.5x | Open |Closed| Open |Closed|Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU |Clock |Multiplier| JP8 | JP9 | JP10 | JP11 | JP12 |
| speed |speed | | | | | | |
|-------+------+----------+------+------+------+------+------|
| 75MHz |50MHz | 1.5x |Closed|Closed|Closed| Open | Open |
|-------+------+----------+------+------+------+------+------|
| 90MHz |60MHz | 1.5x |Closed| Open |Closed| Open | Open |
|-------+------+----------+------+------+------+------+------|
|100MHz |66MHz | 1.5x | Open |Closed| Open | Open | Open |
|-------+------+----------+------+------+------+------+------|
|120MHz |60MHz | 2x |Closed| Open |Closed|Closed| Open |
|-------+------+----------+------+------+------+------+------|
|133MHz |66MHz | 2x | Open |Closed| Open |Closed| Open |
|-------+------+----------+------+------+------+------+------|
|150MHz |60MHz | 2.5x |Closed| Open |Closed|Closed|Closed|
|-------+------+----------+------+------+------+------+------|
|166MHz |66MHz | 2.5x | Open |Closed| Open |Closed|Closed|
|-------+------+----------+------+------+------+------+------|
|200MHz |66MHz | 3x | Open |Closed| Open | Open |Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP14 | JP19 |
|--------------------+-------------------+-------------------|
| Single | Closed | Open |
|--------------------+-------------------+-------------------|
| Dual | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP3 | JP4 |
|------------------+--------------------+--------------------|
| | 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| » | 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 SELECTION |
|------------------------------------------------------------|
| Setting | JP1 | JP2 |
|------------------------+-----------------+-----------------|
| | Used as COM2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed |
|---+--------------------+-----------------+-----------------|
| » | Used as IR | Pins 2 & 3 | Pins 2 & 3 |
| | connector | closed | closed |
+------------------------------------------------------------+