Though this was one of my best (and best-selling) programs, I almost didn't post it here. For one thing, it's hardware dependent (either Byte-Back or Timex/Westridge modem). For another, the hardware is long gone. Thirdly, you'd be hard- pressed to find any 300 baud BBS's anymore. Lastly, though it runs fine on a real ZX81 or TS1500 with appropriate "Wilf board", it won't run in hi-res mode on ZX Emulator. All that being said, it would still be useful as an ASCII text reader. What's more, it used some truly remarkable innovations - like hooking into the interrupt to do fast keyboard sensing (and buffering!) while not missing a byte of incoming data. It was really something to be typing away as fast as you can, while data is coming in, and nary a beat is missed. It also featured separate windows for input, output and control, Xmodem and ASCII down/ uploads, full relocatability... and all that in 4K of machine-code. I'm posting it mainly for historical and study interest, perhaps someone can figure out why it won't work with emulators.
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