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# UNIDENTIFIED
I/O PLUS
Card Type Multi I/O card
Chip Set Unidentified
Maximum Onboard Unidentified
Memory
I/O Options Serial ports (2), Parallel port, Apple II game
port (2), PC game port
Data Bus 8-bit ISA
Card Size Half length, half height
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------------+-------+---------------+-------|
| Serial port 1 | J1 | Apple II game | J5 |
| | | port 1 | |
|----------------------------+-------+---------------+-------|
| Serial port 2 (DTE | J2 | Apple II game | J6 |
| configuration) | | port 2 | |
|----------------------------+-------+---------------+-------|
| Serial port 2 (DCE | J3 | PC game port | J7 |
| configuration) | | | |
|----------------------------+-------+---------------+-------|
| Parallel port | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------+---------------+----------------------|
| Game port enabled | JP2/G | Closed |
|---------------------+---------------+----------------------|
| Game port disabled | JP2/G | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | Label | Position |
|--------------------+------------------+--------------------|
| LPT1 enabled | JP2/P1 | Closed |
|--------------------+------------------+--------------------|
| LPT1 disabled | JP2/P1 | Open |
|--------------------+------------------+--------------------|
| LPT 2 enabled | JP2/P2 | Closed |
|--------------------+------------------+--------------------|
| LPT 2 disabled | JP2/P2 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | Label | Position |
|--------------------+------------------+--------------------|
| COM1 enabled | JP2/C1 | Closed |
|--------------------+------------------+--------------------|
| COM1 disabled | JP2/C1 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | Label | Position |
|--------------------+------------------+--------------------|
| IRQ4 enabled | JP1/4 | Closed |
|--------------------+------------------+--------------------|
| IRQ4 disabled | JP1/4 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 SETTINGS (S - OPTION) |
|------------------------------------------------------------|
| IRQ | Label | Position |
|----------------------------+--------------+----------------|
| IRQ3 enabled | JP1/3S | Closed |
|----------------------------+--------------+----------------|
| IRQ3 disabled | JP1/3S | Open |
|----------------------------+--------------+----------------|
| COM2 enabled | JP2/S2 | Closed |
|----------------------------+--------------+----------------|
| COM2 disabled | JP2/S2 | Open |
|------------------------------------------------------------|
| Note: These options are only used when the board was |
| received as an option S. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | Label | Position |
|--------------------+------------------+--------------------|
| IRQ7 enabled | JP1/7 | Closed |
|--------------------+------------------+--------------------|
| IRQ7 disabled | JP1/7 | Open |
|------------------------------------------------------------|
| Note: LPT is only on Rev. D and up boards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Note: To use the Apple II joystick(s) IC 746505 must be |
| installed at U1. This IC is not required when using an |
| IBM-type joystick. |
+------------------------------------------------------------+