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 comes > 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 ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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