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# A-TREND TECHNOLOGY CORPORATION
ATC-1020
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 128MB (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 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN1 | Reset switch | J1 pins 1 |
| interface | | | & 2 |
|------------------+----------+------------------+-----------|
| Parallel port | CN2 | Green PC | J1 pins 4 |
| | | connector | & 5 |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN3 | Turbo LED | J1 pins 7 |
| | | | & 8 |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN4 | IDE interface | J1 pins |
| | | 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 | JP8 | Open |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP8 | Closed |
|---+-----------------------------------+-------+------------|
| » | Flash BIOS write protect enabled | JP19 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS write protect disabled | JP19 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 |
|----------------------------+-------------------------------|
| 8MB | (1) 1M x 64 |
|----------------------------+-------------------------------|
| 16MB | (1) 2M x 64 |
|----------------------------+-------------------------------|
| 32MB | (1) 4M x 64 |
|----------------------------+-------------------------------|
| 64MB | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Do not install DIMM and SIMM at the same time. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+----------------------+---------------------|
| 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 |
|------------------------------------------------------------|
| 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 |
|------------------------------------------------------------|
| Note: The location of the TAG is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TAG CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP17 |
|-------------------------------+----------------------------|
| Enabled | Closed |
|-------------------------------+----------------------------|
| Disabled | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP5 | JP6 | JP7 | JP9 |JP10 |
| speed | speed | | | | | | |
|-------+--------+----------+------+------+------+-----+-----|
|120MHz | 50MHz | 2x | Open | Open | Open |1 & 2|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|133MHz | 55MHz | 50MHz |Closed|Closed| N/A |1 & 2|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|150MHz | 60MHz | 2x | Open |Closed|Closed|1 & 2|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|166MHz | 66MHz | 2x |Closed| Open |Closed|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP5 | JP6 | JP7 | JP9 |JP10 |
| speed | speed | | | | | | |
|-------+--------+----------+------+------+------+-----+-----|
| 75MHz | 50MHz | 1.5x | Open | Open | Open |1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
| 90MHz | 60MHz | 1.5x | Open |Closed|Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|100MHz | 66MHz | 1.5x |Closed| Open |Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|120MHz | 60MHz | 1.5x | Open |Closed|Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|133MHz | 66MHz | 1.5x |Closed| Open |Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|166MHz | 66MHz | 2x |Closed| Open |Closed|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP5 | JP6 | JP7 | JP9 |JP10 |
| speed | speed | | | | | | |
|-------+--------+----------+------+------+------+-----+-----|
| 75MHz | 50MHz | 1.5x | Open | Open | Open |1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
| 90MHz | 60MHz | 1.5x | Open |Closed|Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|100MHz | 66MHz | 1.5x |Closed| Open |Closed|1 & 2|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|120MHz | 60MHz | 2x | Open |Closed|Closed|1 & 2|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|133MHz | 66MHz | 2x |Closed| Open |Closed|1 & 2|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|150MHz | 60MHz | 2.5x | Open |Closed|Closed|2 & 3|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|166MHz | 66MHz | 2.5x |Closed| Open |Closed|2 & 3|2 & 3|
|-------+--------+----------+------+------+------+-----+-----|
|180MHz | 60MHz | 3x | Open |Closed|Closed|2 & 3|1 & 2|
|-------+--------+----------+------+------+------+-----+-----|
|200MHz | 66MHz | 3x |Closed| Open |Closed|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP11 | JP14 |
|------------------+--------------------+--------------------|
| CX6X86 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| CX6X86L | Pins 2 & 3 closed | Pins 7 & 8 closed |
|------------------+--------------------+--------------------|
| AM K5 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| P54C STD | Pins 1 & 2 closed | Pins 3 & 4 closed |
|------------------+--------------------+--------------------|
| P54C VRE | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| P55C | Pins 2 & 3 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (P55C ONLY) |
|------------------------------------------------------------|
| Voltage | JP14 |
|----------------------------+-------------------------------|
| 2.7v | Pins 9 & 10 closed |
|----------------------------+-------------------------------|
| 2.8v | Pins 7 & 8 closed |
|----------------------------+-------------------------------|
| 2.9v | Pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 3.3v | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 3.5v | Pins 1 & 2 closed |
+------------------------------------------------------------+