Subject: [stella] Syncing without WSYNC From: "B. Watson" <atari@xxxxxxxxxxxxxx> Date: Thu, 30 Aug 2001 10:42:47 -0400 (EDT) |
Hi everybody 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? I saw some code in the Freeway disassembly that does this (with a comment saying `TV is already on next scanline, no need for WSYNC'), but he only does it for one scanline. I'm trying to do it for 8 or so. Pretty soon, I'll be able to stop asking questions like this, my roommate is a hardware hacker and just bought a bunch of 2732 EPROMs, and is in the process of building his own EPROM burner (I wouldn't!) Brian --- If a trainstation is the place where trains stop, what is a workstation? - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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