Re: [stella] TIA Audio Polynomials

Subject: Re: [stella] TIA Audio Polynomials
From: "Eckhard Stolberg" <Eckhard_Stolberg@xxxxxx>
Date: Wed, 19 Nov 2003 22:19:44 +0100
From: "Adam Wozniak" <adam@xxxxxxxxxxxxxxxx>
> On Tue, 18 Nov 2003, Paul Slocum wrote:
> > C=15 doesn't sound like it's correct in emulation either.
> And it's got me stumped too.
> It is periodic, but I can't find a tap sequence for a LFSR which even
> close to approximating it.

Isn't C=15 the same as C=7, except that it operates at
CPUclock/114 instead of TIAclock/114? And I think C=7
uses the same LSFR as C=9. But the output is somehow
combined with a bit that is alternating at the same
speed. I think this is what the "div 2" means that's
listed in the table in the Stella programmer's guide.

Ciao, Eckhard Stolberg

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