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# UNIDENTIFIED
ACE - 386SX - AR1
Processor 80386SX (exact location unknown)
Processor Speed 16/20/25/33MHz
Chip Set Acer
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387SX (exact location unknown)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J4 | Turbo switch | J8 pins |
| | | | 1 - 3 |
|------------------+----------+-------------------+----------|
| Reset switch | J6 | Turbo LED | J8 pins |
| | | | 4 - 5 |
|------------------+----------+-------------------+----------|
| Speaker | J7 | Power LED & | J9 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | ADS delay disabled | J5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | ADS delay enabled | J5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | NPU synchronous with CPU | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU asynchronous with CPU | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parity check disabled | JP6 | Open |
|---+----------------------------------+--------+------------|
| | Parity check enabled | JP6 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 512KB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 1MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 9 | 9 | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 2MB | (1) 1M x 9 | (1) 1M x 9 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 1M x 9 | (1) 1M x 9 | (1) 1M x 9 | (1) 1M x 9 |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 4M x 9 | (1) 4M x 9 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 4M x 9 | (1) 4M x 9 | (1) 4M x 9 | (1) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP1 | JP5 |
|------------------+--------------------+--------------------|
| 16MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 20MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 25MHz | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+