Subject: Re: [stella] why -68? From: ben <ben@xxxxxxxx> Date: Wed, 07 Nov 2001 22:07:19 +1100 |
At 08:49 AM 11/6/2001 -0800, you wrote: >You should thank Eckhard too. He's been doing most of the work for the last >couple of years. Thanks Eckhard :) >In any case, we start counting TIA cycles at -68 because that's how PCAE >does it. We wanted to make it easy to compare results between z26 and PCAE. >When working on an emu, it's very handy to be able to compare with other >ones. But this way TIA starts drawing at cycle 0. > >Yes there are 228 cycles per scanline. 160 - (-68) = 228. But the last >cycle you'll ever see is 157. 160 would put it at the beginning of the next >scanline. At least that's what I think it should do. All makes perfect sense. I was a little worried that there were not exactly 228 cycles per line, so thanks for clearing it up. Ben PS: Dont do complex maths (157 + 68) after midnight, otherwise you'll end up with 236 ;) ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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