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# UNIDENTIFIED
TOP AT I/O PLUS
+------------------------------------------------------------+
|------------------------------------------------------------|
| 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 |
|-----------------------------------------------+------------|
| 40-pin IDE (AT) Interface connector | J1 |
|-----------------------------------------------+------------|
| 34-pin control cable connector - floppy drive | J2 |
|-----------------------------------------------+------------|
| 10-pin serial port 1 | J3 |
|-----------------------------------------------+------------|
| 10-pin serial port 2 | J4 |
|-----------------------------------------------+------------|
| Game port | J5 |
|-----------------------------------------------+------------|
| Mouse port - PS/2 style | J6 |
|-----------------------------------------------+------------|
| 25-pin parallel port | J7 |
|-----------------------------------------------+------------|
| 2-pin connector - drive active LED | J8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | Hard drive controller enabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Hard drive controller disabled | JP1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|-----------------------------+----------+-------------------|
| » | Mouse port enabled | JP2 | Pins 2 & 3 closed |
|---+-------------------------+----------+-------------------|
| | Mouse port disabled | JP2 | Pins 1 & 2 closed |
|---+-------------------------+----------+-------------------|
| » | Game port enabled | SW1/1 | On |
|---+-------------------------+----------+-------------------|
| | Game port disabled | SW1/1 | Off |
|---+-------------------------+----------+-------------------|
| » | Serial port 2 enabled | SW1/2 | On |
|---+-------------------------+----------+-------------------|
| | Serial port 2 disabled | SW1/2 | Off |
|---+-------------------------+----------+-------------------|
| » | Serial port 1 enabled | SW1/3 | On |
|---+-------------------------+----------+-------------------|
| | Serial port 1 disabled | SW1/3 | Off |
|---+-------------------------+----------+-------------------|
| » | Floppy drive enabled | SW1/4 | On |
|---+-------------------------+----------+-------------------|
| | Floppy drive disabled | SW1/4 | Off |
|---+-------------------------+----------+-------------------|
| » | IDE port enabled | SW1/5 | On |
|---+-------------------------+----------+-------------------|
| | IDE port disabled | SW1/5 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MOUSE PORT INTERRUPT SELECT - JP3 |
|------------------------------------------------------------|
| IRQ | Jumper A | Jumper B | Jumper C | Jumper D |
|------------+-----------+-----------+-----------+-----------|
| » | IRQ5 | Open | Open | Open | Closed |
|---+--------+-----------+-----------+-----------+-----------|
| | IRQ2 | Closed | Open | Open | Open |
|---+--------+-----------+-----------+-----------+-----------|
| | IRQ3 | Open | Closed | Open | Open |
|---+--------+-----------+-----------+-----------+-----------|
| | IRQ4 | Open | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT/Address | SW1/6 | SW1/7 |
|------------------------+-----------------+-----------------|
| » | LPT1/3BCh | Off | On |
|---+--------------------+-----------------+-----------------|
| | LPT2/278h | On | Off |
|---+--------------------+-----------------+-----------------|
| | LPT3/378h | On | On |
|---+--------------------+-----------------+-----------------|
| | Disabled | Off | Off |
+------------------------------------------------------------+