TEXT View Source
# MICRONICS COMPUTERS, INC.
TWISTER AT (REV. 1B)
Device Type Mainboard
Processor CX 6x86/AM K5/AM K6/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200/233MHz
Chip Set Intel 430TX
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (5), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), IR connector, USB connectors (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+----------------+------------|
| USB connector 1 | J10 | Green PC | J23/pins 3 |
| | | connector | & 4 |
|-------------------+----------+----------------+------------|
| USB connector 2 | J11 | IR connector | J23/pins 6 |
| | | | - 10 |
|-------------------+----------+----------------+------------|
| IDE interface 2 | J13 | IDE interface | J23/pins |
| | | LED | 13 - 16 |
|-------------------+----------+----------------+------------|
| Serial port 2 | J14 | Power LED | J23/pins |
| | | | 18 - 20 |
|-------------------+----------+----------------+------------|
| IDE interface 1 | J15 | Reset switch | J23/pins |
| | | | 22 & 23 |
|-------------------+----------+----------------+------------|
| Floppy drive | J16 | Speaker | J23/pins |
| interface | | | 24 - 27 |
|-------------------+----------+----------------+------------|
| Parallel port | J17 | Power LED & | J24 |
| | | keylock | |
|-------------------+----------+----------------+------------|
| Chassis fan power | J18 | SCSI interface | J101 |
| | | LED | |
|-------------------+----------+----------------+------------|
| PS/2 mouse | J19 | 32-bit PCI | PC1 - PC5 |
| interface | | slots | |
|-------------------+----------+----------------+------------|
| Serial port 1 | J22 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| ? | CMOS memory normal operation | JP1 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | JP1 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | Flash BIOS normal operation | JP2 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | Flash BIOS reserved | JP2 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 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 & SDRAM 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) 1M x 64 | (1) 4M x 64 |
|--------------+------------------------+--------------------|
| 48MB | (1) 2M x 64 | (1) 4M x 64 |
|--------------+------------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|--------------+------------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|--------------+------------------------+--------------------|
| 72MB | (1) 1M x 64 | (1) 8M x 64 |
|--------------+------------------------+--------------------|
| 80MB | (1) 2M x 64 | (1) 8M x 64 |
|--------------+------------------------+--------------------|
| 96MB | (1) 4M x 64 | (1) 8M x 64 |
|--------------+------------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|--------------+------------------------+--------------------|
| 256MB | (1) 16M x 64 | (1) 16M x 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO & SDRAM memory. Banks 2 & 3 are |
| interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (2) 32K x 32 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
|------------------------------------------------------------|
| Note: The location of the cache is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
|CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
|CPU |Clock |Multiplier|JP4 |JP5 |JP6 |JP7 |JP8 |JP60|
|speed |speed | | | | | | | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|150MHz |50MHz |2x |1 & 2|2 & 3|2 & 3|2 & |1 & |Open|
| | | | | | |3 |2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|166MHz |60MHz |2x |1 & 2|2 & 3|2 & 3|1 & |2 & |Open|
| | | | | | |2 |3 | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD K5) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP4 | JP5 | JP6 |JP7 |JP8 |JP60|
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+-----+----+----+----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|2 & 3|2 & |2 & |Open|
| | | | | | | 3 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|120MHz | 60MHz | 1.5x |1 & 2|1 & 2|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|133MHz | 66MHz | 2x |1 & 2|2 & 3|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
|CPU SPEED SELECTION (AMD K6) |
|------------------------------------------------------------|
|CPU |Clock |Multiplier|JP4 |JP5 |JP6 |JP7 |JP8 |JP60 |
|speed |speed | | | | | | | |
|-------+--------+----------+-----+-----+----+----+----+-----|
|166MHz |66MHz |2.5x |2 & 3|2 & 3|2 & |1 & |2 & |Open |
| | | | | |3 |2 |3 | |
|-------+--------+----------+-----+-----+----+----+----+-----|
|200MHz |66MHz |3x |2 & 3|1 & 2|2 & |1 & |2 & |Open |
| | | | | |3 |2 |3 | |
|-------+--------+----------+-----+-----+----+----+----+-----|
|233MHz |66MHz |3.5x |1 & 2|1 & 2|2 & |1 & |2 & |1 & 2|
| | | | | |3 |2 |3 | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP4 | JP5 | JP6 |JP7 |JP8 |JP60|
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+-----+----+----+----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|2 & 3|2 & |2 & |Open|
| | | | | | | 3 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|120MHz | 60MHz | 2x |1 & 2|2 & 3|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|133MHz | 66MHz | 2x |1 & 2|2 & 3|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|180MHz | 60MHz | 3x |2 & 3|1 & 2|2 & 3|2 & |1 & |Open|
| | | | | | | 3 | 2 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|200MHz | 66MHz | 3x |2 & 3|1 & 2|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|-------+--------+----------+-----+-----+-----+----+----+----|
|233MHz | 66MHz | 3.5x |1 & 2|1 & 2|2 & 3|1 & |2 & |Open|
| | | | | | | 2 | 3 | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
|CPU TYPE SELECTION |
|------------------------------------------------------------|
|Type |JP11 |JP12 |JP13 |JP14 |JP16|JP17 |JP18|JP19|
|----------+------+------+------+------+----+------+----+----|
|CX6X86 |Open |Closed|Open |Open |Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|CX6X86L |Open |Open |Open |Closed|Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|AM K5 |Open |Open |Closed|Open |Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|AM K6 |Open |Open |Open |Closed|Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|AM K6 |Closed|Open |Open |Open |Open|Closed|Open|Open|
|233MHz | | | | | | | | |
|----------+------+------+------+------+----+------+----+----|
|P54C |Open |Closed|Open |Open |Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|P54CS |Open |Closed|Open |Open |Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|P54CTB |Open |Closed|Open |Open |Open|Closed|Open|Open|
|----------+------+------+------+------+----+------+----+----|
|P55C |Open |Open |Open |Closed|Open|Closed|Open|Open|
+------------------------------------------------------------+