Port bit set/clear register
| IOSB0 | Set bit 0 |
| IOSB1 | Set bit 1 |
| IOSB2 | Set bit 1 |
| IOSB3 | Set bit 3 |
| IOSB4 | Set bit 4 |
| IOSB5 | Set bit 5 |
| IOSB6 | Set bit 6 |
| IOSB7 | Set bit 7 |
| IOSB8 | Set bit 8 |
| IOSB9 | Set bit 9 |
| IOSB10 | Set bit 10 |
| IOSB11 | Set bit 11 |
| IOSB12 | Set bit 12 |
| IOSB13 | Set bit 13 |
| IOSB14 | Set bit 14 |
| IOSB15 | Set bit 15 |
| IOCB0 | Clear bit 0 |
| IOCB1 | Clear bit 1 |
| IOCB2 | Clear bit 2 |
| IOCB3 | Clear bit 3 |
| IOCB4 | Clear bit 4 |
| IOCB5 | Clear bit 5 |
| IOCB6 | Clear bit 6 |
| IOCB7 | Clear bit 7 |
| IOCB8 | Clear bit 8 |
| IOCB9 | Clear bit 9 |
| IOCB10 | Clear bit 10 |
| IOCB11 | Clear bit 11 |
| IOCB12 | Clear bit 12 |
| IOCB13 | Clear bit 13 |
| IOCB14 | Clear bit 14 |
| IOCB15 | Clear bit 15 |