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# J-MARK COMPUTER CORPORATION
386DX 25/40 NON CACHE
Processor 80386DX
Processor Speed 25/40MHz
Chip Set CGS
Max. Onboard DRAM 32MB
Cache None
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387DX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | JP2 | Reset switch | JP9 |
|---------------------+----------+----------------+----------|
| Speaker | JP7 | Turbo switch | JP10 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | JP8 | Turbo LED | JP11 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP3 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP3 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | NPU synchronous with CPU | JP5 | Open |
|---+--------------------------------+--------+--------------|
| | NPU asynchronous with CPU | JP5 | Closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | JP6 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP6 | Open |
|---+--------------------------------+--------+--------------|
| » | Turbo switch enabled | JP10 | Closed |
|---+--------------------------------+--------+--------------|
| | Turbo switch disabled | JP10 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+