| ??? 04/14/10 05:51 Read: times |
#175030 - Lots of unanswered questions, but probably yes Responding to: ???'s previous message |
It was done 30 years ago with quite a number of much slower microprocessors than what's available today. Some effort has to be put into simple RC filtering of the transmitted and received waveforms, but it's pretty simple. With a 1 MHz 6502, it was quite straightforward to achieve 4800 bps. With a little imagination and a little arithmetic, you should be able to figure it out.
For a few hints, you might want to look at old "mostly software" audio tape interfaces. RE |
| Topic | Author | Date |
| FSK Modul | 01/01/70 00:00 | |
| Incomplete question | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| Just Simple FSK | 01/01/70 00:00 | |
| V.22? | 01/01/70 00:00 | |
| Scenix and Cypress | 01/01/70 00:00 | |
| Yes, here's an 80c51 that does it | 01/01/70 00:00 | |
| ftp://ftp.embedded.com/pub/2002/09banks | 01/01/70 00:00 | |
| it's been a while ... | 01/01/70 00:00 | |
| with 80C51 | 01/01/70 00:00 | |
| Built FSK Modul | 01/01/70 00:00 | |
| there's such info | 01/01/70 00:00 | |
| I cannot find it | 01/01/70 00:00 | |
past info | 01/01/70 00:00 | |
| Lots of unanswered questions, but probably yes | 01/01/70 00:00 | |
| I was thinjing much the same thing | 01/01/70 00:00 | |
| There are problems with some modulation schemes | 01/01/70 00:00 |