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# A-TREND TECHNOLOGY CORPORATION
ATC-2000
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 280mm 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, serial ports
(2), cache slot, IR connector, USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN1 | Reset switch | J1 pins 1 |
| | | | & 2 |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN2 | Green PC | J1 pins 4 |
| | | connector | & 5 |
|------------------+----------+------------------+-----------|
| Parallel port | CN3 | Turbo LED | J1 pins 7 |
| | | | & 8 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN4 | IDE interface | J1 pins |
| interface | | LED | 10 & 11 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | CN5 | Speaker | J1 pins |
| | | | 12 - 15 |
|------------------+----------+------------------+-----------|
| IDE interface 2 | CN6 | Power LED & | J1 pins |
| | | keylock | 17 - 21 |
|------------------+----------+------------------+-----------|
| PS/2 mouse port | CN7 | 32-bit PCI slots | PC1 – PC4 |
|------------------+----------+------------------+-----------|
| Chassis fan | FAN | Cache slot | SL1 |
| power | | | |
|------------------+----------+------------------+-----------|
| IR connector | IR | USB connector | USB |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| » | CMOS memory normal operation | JP5 | Open |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | JP5 | Closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP14 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 5v | JP14 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+----------------------+---------------------|
| 4MB | (2) 512K x 36 | None |
|---------------+----------------------+---------------------|
| 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 memory. Banks are interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+--------------+-------------------+-----------------|
| 256KB | None | 256KB module | (1) 16K/32K x 8 |
| | | installed | |
|-------+--------------+-------------------+-----------------|
| 256KB | (2) 32K x 32 | Not installed | (1) 16K/32K x 8 |
|-------+--------------+-------------------+-----------------|
| 512KB | (2) 64K x 32 | Not installed | (1) 16K/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TAG CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP1 |
|-------------------------------+----------------------------|
| Enabled | Closed |
|-------------------------------+----------------------------|
| Disabled | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP3 | JP4 | JP6 | JP7 | JP8 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 50MHz | 2x |2 & 3|1 & 2| Open |Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 55MHz | 2x |2 & 3|1 & 2| N/A | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2x |2 & 3|1 & 2|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2x |2 & 3|1 & 2|Closed|Closed| Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP3 | JP4 | JP6 | JP7 | JP8 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2| Open |Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 66MHz | 1.5x |1 & 2|1 & 2|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2x |2 & 3|1 & 2|Closed| Open |Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP3 | JP4 | JP6 | JP7 | JP8 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2| Open |Closed|Closed|
|-------+--------+----------+-----+-----+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 60MHz | 2x |2 & 3|1 & 2|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 66MHz | 2x |2 & 3|1 & 2|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|180MHz | 60MHz | 3x |1 & 2|2 & 3|Closed| Open |Closed|
|-------+--------+----------+-----+-----+------+------+------|
|200MHz | 66MHz | 3x |1 & 2|2 & 3|Closed|Closed| Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP9 | JP10 | JP11 |
|----------+----------------+----------------+---------------|
| CX6X86 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| AM K5 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| P54C STD | Pins 3 & 4 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| P54C VRE | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (P55C ONLY) |
|------------------------------------------------------------|
| Voltage | V core | JP9 | JP10 | JP11 | JP12 | JP13 |
|---------+--------+--------+--------+-------+--------+------|
| 3.3v | 2.7v | 9 & 10 | 2 & 3 | 2 & 3 | Closed | Open |
|---------+--------+--------+--------+-------+--------+------|
| 3.3v | 2.8v | 7 & 8 | 2 & 3 | 2 & 3 | Closed | Open |
|---------+--------+--------+--------+-------+--------+------|
| 3.3v | 2.9v | 5 & 6 | 2 & 3 | 2 & 3 | Closed | Open |
|---------+--------+--------+--------+-------+--------+------|
| 3.3v | 3.3v | 3 & 4 | 2 & 3 | 2 & 3 | Closed | Open |
|---------+--------+--------+--------+-------+--------+------|
| 3.3v | 3.52v | 1 & 2 | 2 & 3 | 2 & 3 | Closed | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+