Subject: Re: [stella] Super Fast Scrolling From: "Andrew Davie" <adavie@xxxxxxxxxxxxx> Date: Wed, 11 Apr 2001 14:01:42 +1000 |
Choppiness is a result of changing the scroll at a slow frame-rate. As your 2600 will be running at 50/60Hz, if you update your scroll at that rate, too, it won't be choppy. Anthing below about 30Hz starts to be noticeably bad. Cheers A -- _ _ _| _ _ _| _ * _ _ , (_|| )(_|( (/_\/\/ (_|(_|\/(_(/_ ,~' L_|\ ,-' \ see my Museum of Soviet Calculators at ( \ http://www.taswegian.com/MOSCOW/soviet.html \ __ / Qb: the latest retro video game! L,~' "\__/ http://www.atari2600.org/qb.html @--> v ----- Original Message ----- From: "Tempest" <reicher6@xxxxxxxxxxxxx> To: <stella@xxxxxxxxxxx> Sent: Wednesday, April 11, 2001 1:49 PM Subject: RE: [stella] Super Fast Scrolling > Yeah I realized that this was a stupid question the second I sent it (should > have consulted the manual first). What I really wanted to know is if the > scrolling effect would look all jerky if you went too fast. I've seen some > nice scrolling effects like River Raid and then I've seen some crappy ones > where it's all choppy (like Super Cobra). I was hoping to avoid the latter. > Choppy scrolling isn't a matter of speed then is it? Is it how often you > update the PF registers? > > > Tempest > > -----Original Message----- > From: owner-stella@xxxxxxxxxxx [mailto:owner-stella@xxxxxxxxxxx]On > Behalf Of Erik Mooney > Sent: Tuesday, April 10, 2001 11:23 PM > To: stella@xxxxxxxxxxx > Subject: Re: [stella] Super Fast Scrolling > > > >How fast can the 2600 scroll playfield graphics? I was thinking about > >trying to do a Caverns of Mars type demo before I move onto my Major Havoc > >game, but as I remember the game is only fun when you played it at the > >fastest speed (a.k.a way too fast!). I'm wondering if the 2600 could move > >that fast. > > The 2600 redraws the entire screen every frame, and is not beholden to a > background tile buffer (like the NES), so it can scroll at any speed you > like. Horizontal scrolling must be in increments of 4 pixels for > playfield, but vertical can be any speed at single scanline resolution. > > - > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://www.biglist.com/lists/stella/ > > > - > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://www.biglist.com/lists/stella/ > - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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