For those of you who don't know me. I've written code under CP/M, DOS,
Windows, Mac OS (1.x to 7.x), Unix/Xenix/Linux and 6502 and 80x86 assembler.
I also was part of the team that wrote the multiuser/Multitaking DOS called
PC-MOS.
I learned a lot about soundcard and serial ports over time.
First:
The Soundcard was never designed to be a TU. The soundcard was designed to
give GAMES better quality sound, so we wouldn't have to use the computer
speaker.
Second:
The serial port was designed to go from DTE (Data Terminal Equipment) to a
DCE (Data Communications Equipment), not to be used as a keying circuit.
To get a true good RTTY TU, you need external hardware, like Joe was talking
about, but because hams found a way to make these work in a non-standard
mode, then it's almost impossible for hardware people to do good, quality
work and make a profit. (It's the same with software people, some of us try
to make a living with software).
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