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# UNIDENTIFIED
B237
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 16-bit, ISA |
|-------------------+----------------------------------------|
| Size: | Half-length, full-height card |
|-------------------+----------------------------------------|
| Hard drive | Two IDE (AT) Interface drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, or 1.44MB |
| supported: | drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-----------------------------------------------+------------|
| 25-pin parallel port (LPT1/2) - external | CN1 |
|-----------------------------------------------+------------|
| 15-pin game port - external | CN2 |
|-----------------------------------------------+------------|
| 10-pin serial port (COM1/3) - internal | CN3 |
|-----------------------------------------------+------------|
| 10-pin serial port (COM2/4) - internal | CN4 |
|-----------------------------------------------+------------|
| 34-pin control cable connector - floppy drive | CN5 |
|-----------------------------------------------+------------|
| 40-pin IDE (AT) Interface connector | CN6 |
|-----------------------------------------------+------------|
| 4-pin connector - drive active LED | CN7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS |
|------------------------------------------------------------|
| Setting | JP3 | JP4 |
|------------------+--------------------+--------------------|
| 3BCh | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 378h | pins 1 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 278h | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| Disable | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORTS COM SELECT |
|------------------------------------------------------------|
| Serial 1 | Serial 2 | JP5 | JP6 | JP7 |
|----------+----------+------------+------------+------------|
| COM1 | COM2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+----------+------------+------------+------------|
| COM2 | COM1 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE SELECT |
|------------------------------------------------------------|
| Setting | JP8 | JP9 |
|------------------+--------------------+--------------------|
| Enabled | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Disabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+