From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2003-05-19 08:45:33
On Sun, May 18, 2003 at 11:15:01PM -0400, email@example.com wrote: > If the signal is not on the tape, you cannot get it off. Try an > oscilloscope on the output from the read head. If you have signal, a > storage scope may be able to capture it. The signal sounds pretty much the same as it is supposed to. I think that the number of pulses is still correct - only the times when the pulses are triggered vary too much. To rescue some tapes in standard format, I wrote a slightly more error-tolerant decoder, which you can find at http://www.funet.fi/pub/cbm/crossplatform/transfer/datassette/ as decode.pl. It's not very good, and a lot of manual postprocessing is needed. I understand that writing anything similar for the Turbo Tape format is more challenging, since there are only two distinct pulse widths. The standard format uses a third pulse width for marking byte boundaries, and it stores each data block twice. Marko Message was sent through the cbm-hackers mailing list
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