Subj : Play audio from a serial port
To   : AKAcastor
From : Bob Worm
Date : Sun May 26 2024 22:06:07

  Re: Play audio from a serial port
  By: AKAcastor to Bob Worm on Sun May 26 2024 11:50:22

Hi, Chris.

 > At our age, how much is there to hear above 7 kHz anyway?  :D

Heha, well, ironically... despite it now being hard to follow conversations in loud rooms I can still hear those damned mosquito speakers they put in shopping centres to stop teens loitering really clearly. But then, when we went in for the ultrasound for my son 18 years ago I could hear that  really clearly - including the pitch changes when they adjusted the depth setting. The little foetus went kind of nuts as well, must be genetic :)

 >  BW> Hmm. My interest is piqued but I really want to finish writing my Acorn
 >  BW> terminal emulator before I move onto something else.
 >
 > I support your choice of priorities!  Terminal emulator sounds like an
 > important project and deserves attention too.

Out of interest I tried just adding the serial handler without assembler-ising the code and optimising it. It needs the optimisations :) Or I need to find BBSes that don't send more than one line of text at a time as it can't keep up at volume and just hits the wall. I will probably add a FIFO / circle buffer to soak up bursts as some of the routines are just... slow.

 > The A3020 looks like a nice machine, what kind of speed do you expect your
 > terminal emulator to be able to operate at?  115.2k seems doable?  I am
 > assuming this is serial port based, or are you writing a network client?

Oh, this is serial. It didn't have a network card when I rescued it from a skip 20 years ago and I've tried to keep it original (other than the essential CF card to IDE adaptor). In theory its serial port can do 19200bps but I believe it's not assured to be stable at that rate so 9600 is the recommended maximum. Once I get all the BASIC out of this it should cope at 9600.

FWIW I absolutely love the A3020, and I never even experienced one back in the day so this is objective love rather than nostalgic love :)

BobW
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