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From
SubjectRe: NEWSFLASH! Linux ported to Commodore VIC-20!!
Date
Followup to:  <Pine.LNX.4.03.9809142117340.18980-100000@mercator.cs.kuleuven.ac.be>
By author: Geert Uytterhoeven <Geert.Uytterhoeven@cs.kuleuven.ac.be>
In newsgroup: linux.dev.kernel
> >
> > That's one of the other reasons of course that they got dreadful data
> > rates; they used what was effectively a single-bit ADC to read from the
> > tape...
>
> Similar to the C-64. If you multiplied the single bit value with 15 and stored
> the result in the SID volume register, you had an audio cassette player!
>

With what, 3 dB of noise margin? (I think the quantization noise
floor is -3.32 dB per bit.)

-hpa

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