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# CACHING TECH CORPORATION
NESXA MOTHERBOARD
Processor 80386SX/CX486SLC
Processor Speed 25/33/40MHz
Chip Set ALI
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 220mm x 170mm
I/O Options None
NPU Options 80387SX/CX83S87
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+-----------+-----------------+-----------|
| External battery | J4 pins 1 | Turbo LED | J8 pins 1 |
| | & 4 | | & 2 |
|------------------+-----------+-----------------+-----------|
| Reset switch | J6 | Turbo switch | J8 pins 3 |
| | | | & 4 |
|------------------+-----------+-----------------+-----------|
| Speaker | J7 | Power LED & | J9 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select monochrome | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Battery select internal (normal | J4 | pins 2 & 3 |
| | operation) | | closed |
|---+----------------------------------+--------+------------|
| | Battery select external (normal | J4 | pins 1 & 4 |
| | operation) | | connected |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J4 | pins 3 & 4 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------+------------------------+-----------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|-----------+------------------------+-----------------------|
| 2MB | (2) 1M x 9 | NONE |
|-----------+------------------------+-----------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|-----------+------------------------+-----------------------|
| 8MB | (2) 4M x 9 | NONE |
|-----------+------------------------+-----------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+