| ??? 06/17/05 01:34 Read: times |
#95124 - Such AS ?? Responding to: ???'s previous message |
Erik Malund said:
You may not have these problems if you memory map the 8255
and then you may get others, the 8255 you bought in the antique shop around the corner is famous for problems with timing. Erik Such AS ??? The 8255 is still a current device and I have used some from the 'antique shop' as well as current ones, without any problems. It is most unlikely that if you adhere to its specifications that you will have any problems with it. If it was a problamatic device I think the industry would have taken it off the market long ago and it would not be produced by so many component manufacturers. Tony |
| Topic | Author | Date |
| external memory access problem | 01/01/70 00:00 | |
| my first suggestion.... | 01/01/70 00:00 | |
| actually i tried in single instruction | 01/01/70 00:00 | |
| more | 01/01/70 00:00 | |
| Relic Chips Are Slow | 01/01/70 00:00 | |
| Memory Map IT !! | 01/01/70 00:00 | |
| and then you may get others | 01/01/70 00:00 | |
| Such AS ?? | 01/01/70 00:00 | |
| with the '51 | 01/01/70 00:00 | |
| 8085/805x <=>8255 | 01/01/70 00:00 | |
| to slow, too low | 01/01/70 00:00 | |
really need more info to be helpful | 01/01/70 00:00 | |
| Query | 01/01/70 00:00 | |
| re query | 01/01/70 00:00 |