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# UNIDENTIFIED
OPM 386 MOTHER BOARD
Processor 80386DX
Processor Speed 25MHz
Chip Set OPTI
Max. Onboard DRAM 8MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options IDE interface, Floppy drive interface
NPU Options 80387DX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Turbo switch | J1 | Speaker | J7 |
|-------------------+----------+------------------+----------|
| Reset switch | J2 | IDE interface | J9 |
|-------------------+----------+------------------+----------|
| Turbo LED | J3 | Floppy drive | J10 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Power LED & | J5 | External battery | JP6 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| IDE interface LED | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| | Monitor type select color | J4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Pipeline disabled | J8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Pipeline enabled | J8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Floppy drive interface address | JP3 | Closed |
| | select 370h - 377h | | |
|---+----------------------------------+--------+------------|
| | Floppy drive interface address | JP3 | Open |
| | select 3F0h - 3FFh | | |
|---+----------------------------------+--------+------------|
| | Floppy drive interface enabled | JP4 | Closed |
|---+----------------------------------+--------+------------|
| | Floppy drive interface disabled | JP4 | Open |
|------------------------------------------------------------|
| Note: The location of J8 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE INTERFACE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP1 | JP2 |
|--------------------+-------------------+-------------------|
| Enabled | Open | Closed |
|--------------------+-------------------+-------------------|
| Disabled | Closed | Open |
+------------------------------------------------------------+