| ??? 05/03/05 06:46 Read: times |
#92772 - Read Modify Write Responding to: ???'s previous message |
Russell Bull said:
Jan, the method Ian suggested is not a 'hack' - it is a very common way of doing it. The downside with Ian's method is that you have to be sure of what is connected to those port pins as you are doing a read-modify-write. If the logic levels are not correct on those port pins due to loading they will not read correctly and when you write them back you'll have problems. Maybe I am missing something but I thought the read/modify write instruction read and write the port latches not the port pins so my method is quite safe. See the Hardware Reference section of the bible for details. Ian |
| Topic | Author | Date |
| Software When Using Decoder | 01/01/70 00:00 | |
| Decoder s/w | 01/01/70 00:00 | |
| What About This 3-to-8 Decoder? | 01/01/70 00:00 | |
| More decoders | 01/01/70 00:00 | |
| Further Explanation | 01/01/70 00:00 | |
| Which Way? | 01/01/70 00:00 | |
| Good! | 01/01/70 00:00 | |
| No hack involved | 01/01/70 00:00 | |
| Read Modify Write | 01/01/70 00:00 | |
| I stand corrected | 01/01/70 00:00 | |
| How would you call it then? | 01/01/70 00:00 | |
| SUPERSUB | 01/01/70 00:00 | |
| An Example! | 01/01/70 00:00 | |
| no doubt | 01/01/70 00:00 | |
| electronic ecology | 01/01/70 00:00 | |
| Further Explanation | 01/01/70 00:00 | |
| Further to Further explanation | 01/01/70 00:00 | |
Thanks Again Russell! | 01/01/70 00:00 |