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# CORE PACIFIC ELECTRONICS, INC
386 MAINBOARD
Processor 80386DX
Processor Speed 33/40MHz
Chip Set Forex
Max. Onboard DRAM 32MB
Cache 32/64/128KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387/3167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | JP2 | Power LED & | JP9 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | JP7 | Speaker | JP10 |
|------------------+----------+-------------------+----------|
| Reset switch | JP8 | Turbo switch | JP11 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | NPU mode select synchronous with | JP5 | pins 1 & 2 |
| | CPU | | closed |
|---+----------------------------------+--------+------------|
| | NPU mode select synchronous with | JP5 | pins 2 & 3 |
| | oscillator installed at Y1 | | closed |
|---+----------------------------------+--------+------------|
| » | CPU speed select forced slow | JP11 | Closed |
|---+----------------------------------+--------+------------|
| | CPU speed select switchable at | JP11 | Open |
| | keyboard | | |
|---+----------------------------------+--------+------------|
| » | External battery select 3.6VDC | JP200 | Closed |
|---+----------------------------------+--------+------------|
| | External battery select 6.0VDC | JP200 | Open |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | JP201 | Closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JP201 | Open |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP202 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP202 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1 M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | U15 | U16 |
|-------+------------+-------------+------------+------------|
| 32KB | (4) 8K x 8 | NONE | NONE | (1) 8K x 8 |
|-------+------------+-------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+------------+-------------+------------+------------|
| 128KB | NONE | (4) 32K x 8 | (1) 32K x | NONE |
| | | | 8 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 |
|----------------------------+-------------------------------|
| 32KB | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 64KB | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 128KB | pins 2 & 3 closed |
+------------------------------------------------------------+