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# CACHING TECH CORPORATION
C386MX
Processor 80386DX/CX486DLC
Processor Speed 33/40MHz
Chip Set MXIC
Max. onboard DRAM 32MB
Cache None
BIOS AMI
Dimensions 254mm x 218mm
I/O Options None
NPU Options 80387DX/CX487DLC/3167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | BATT2 | Turbo switch | CN4 |
|-------------------+----------+------------------+----------|
| Power LED & | CN1 | Turbo LED | CN5 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | CN2 | External | KB2 |
| | | Keyboard | |
|-------------------+----------+------------------+----------|
| Reset switch | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------+---------------+----------------|
| » | CMOS memory normal | BATT2 | pins 2 & 3 |
| | operation (Internal | | closed |
| | Battery) | | |
|---+-----------------------+---------------+----------------|
| | CMOS memory normal | BATT2 | Connect to 1 & |
| | operation (External | | 4 |
| | Battery) | | |
|---+-----------------------+---------------+----------------|
| | CMOS memory clear | BATT2 | pins 1 & 2 |
| | | | closed |
|---+-----------------------+---------------+----------------|
| » | Monitor type select | C/M | Open |
| | color | | |
|---+-----------------------+---------------+----------------|
| | Monitor type select | C/M | Closed |
| | monochrome | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JF0 | JF1 |
|-------------------+--------------------+-------------------|
| 33MHz | Closed | Open |
|-------------------+--------------------+-------------------|
| 40MHz | Open | Closed |
|------------------------------------------------------------|
| Note:The locations of JFO and JF1 are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+-----------------------+---------------------|
| 1MB | (4) 256K x 9 | NONE |
|--------------+-----------------------+---------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|--------------+-----------------------+---------------------|
| 4MB | (4) 1M x 9 | NONE |
|--------------+-----------------------+---------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|--------------+-----------------------+---------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|--------------+-----------------------+---------------------|
| 16MB | (4) 4M x 9 | NONE |
|--------------+-----------------------+---------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|--------------+-----------------------+---------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------------------------------------------------|
| Note:The locations of bank 0 and bank 1 may be different |
| on the system board. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J2 |
|----------------------------+-------------------------------|
| 80386DX | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| CX486DLC | pins 2 & 3 closed |
+------------------------------------------------------------+