From: Gideon Zweijtzer (gideonz_at_dds.nl)
Date: 2003-05-20 07:16:22
I once wrote a program to load turbo-saved programs from a tape with an
Amiga and a sound sampler. It worked pretty well, but since my Amiga is
somewhere in a cabinet, that program has probably got lost. It wasn't
such a pain to write, though... I think it is even easier to just
connect a tape deck to your PC, sample the whole tape and run the
decoder program over it to extract all programs. I think those decoder
programs are readily available on the web.
Gideon
> -----Original Message-----
> From: owner-cbm-hackers@cling.gu.se
> [mailto:owner-cbm-hackers@cling.gu.se] On Behalf Of Marko Mäkelä
> Sent: Monday, May 19, 2003 08:46
> To: cbm-hackers@cling.gu.se
> Subject: Re: Robust tape decoders anywhere?
>
>
> 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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