Path: utzoo!mnetor!uunet!yale!jellinghaus-robert From: jellinghaus-robert@CS.YALE.EDU (Rob Jellinghaus) Newsgroups: comp.sys.mac.programmer Subject: Re: screen swapping Message-ID: <27205@yale-celray.yale.UUCP> Date: 15 Apr 88 01:37:32 GMT References: Sender: root@yale.UUCP Reply-To: jellinghaus-robert@yale.UUCP Distribution: na Organization: Yale University Computer Science Dept, New Haven CT 06520-2158 Lines: 31 In article bm1q+@andrew.cmu.edu (Benjamin Jameson McCurtain) writes: >> don't do it ... mac II stuff, etc. etc. etc... use off screen buffers >> and copy it onto the screen, etc. > >NO NO NO NO!!!! I could care less about Mac II's right now, all I want to >do is REALLY FAST animation of a bunch of objects and even screen scrolling! > >That's all! If I wanted to be upwardly compatible and all, I wouldn't be >writing directly to the memory! Copybits sure is versatile, but I need >pure 68K turbocharging!! Waaaahh!!! You are going to make a lot of Mac II owners kind of sad... Yes, there are Mac II-owning game addicts in existence... >Dark Castle (and beyond DC) both use screen swapping ( you can see the >effect by having the Jclock init while the screen is scrolling in the >labyrinths, it's all over the place)... Does these games work on a Mac II? Yes, BDC DOES work on a Mac II. Under Multifinder, yet (as long as nothing is going on in the background, but at least it doesn't crash). It puts up a BIG dialog box and plays the game inside that. So there must be ways around direct screen writes. Now all you have to do is call Silicon Beach and wangle their algorithms out of them :-) >Ben -- bm1q@andrew.cmu.edu Rob Jellinghaus | "FISH-NET-FISH-NET- jellinghaus@yale.edu | FISH-NET-FISH-NET- ROBERTJ@{yalecs,yalevm}.BITNET | FISH!" !..!ihnp4!hsi!yale!jellinghaus | -- Zippy