Subject: Re: [stella] Syncing without WSYNC From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Thu, 30 Aug 2001 11:04:55 -0400 (EDT) |
On Thu, 30 Aug 2001, B. Watson wrote: > Does anyone know, is one scanline *exactly* 76 cycles? I.E. if I write a > scanline loop with no STA WSYNC in it, that takes exactly 76 cycles (with > dey;bne start_of_loop as the last 5 cycles), will the Atari stay in sync > with the TV picture, or are the WSYNCs absolutely necessary? The emulators > all handle it fine, but will a real Atari be able to do this? Yes, you can do this. Strobing the WSYNC register is just a lazy way to do it. It also only takes 2 bytes. Delay loops and whatnot waste valuable ROM space. :) -Chris - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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