Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
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


List of 17 messages in thread
TopicAuthorDate
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      

Back to Subject List