wlevak_at_cyberspace.org
Date: 2003-05-20 06:05:36
Sounds like you need to clean the rollers. If that doesn't work, you may
have to change the belt.
On Mon, 19 May 2003 marko.makela@hut.fi wrote:
> On Sun, May 18, 2003 at 11:15:01PM -0400, wlevak@cyberspace.org 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
>
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>
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