Re: 10x CLOAD (fwd)

From: Marko Mäkelä (
Date: 1999-10-05 14:13:52

On Tue, 5 Oct 1999, Martijn van Buul wrote:

> Why bother? TurboTape has been developed -ages- ago, and works rather
> nice.

An audio CD has a sampling frequency of 44100 Hz, much more than the
bandwidth of a C cassette.  44100 Hz is 22 clock cycles on the PAL C64, 23
on NTSC.  It could be possible to use e.g. a 4:5 GCR coding with a bit
rate of 22050 Hz, which gives a byte rate of 2205 bytes per second. That
is much more than TurboTape can ever achieve.  Even 44100 bit/s would be
theoretically possible if the "cassette read" input was edge-sensitive on
both falling and rising edges.  Maybe it is at least on some Commodores.


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