Have people
discovered any gotchas in general about using PC audio
files to load and save from tape, besides the obvious ones like don't
compress, etc.? Any suggestions about how to make the Mac's output
more acceptable to the Tutor?
A low-pass filter? How does the waveform look on a 'scope?
The Tutor doesn't save tape as FSK or KCS; it's actually just pulses, i.e.,
-||-|--|-||-|--|--
It reminds me more of the Commodore Datasette than the Texas Instruments
machines the Tutor was descended from, actually.
The trick with decoding it wasn't per se figuring out the frequencies, it
was figuring out what pulse pattern meant which bit, and then shuffling the
bits around until I got some sort of framing that made sense. But that's
what makes the playback problem mystifying because this should be very
simple to generate and play back. I don't see what a filter would do to help
here necessarily unless I'm misunderstanding the alleged purpose.
--
------------------------------------ personal:
http://www.cameronkaiser.com/ --
Cameron Kaiser * Floodgap Systems *
www.floodgap.com * ckaiser at
floodgap.com
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