Path: utzoo!mnetor!uunet!husc6!bbn!mit-eddie!ll-xn!ames!oliveb!sun!pepper!cmcmanis
From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Horizontal scrolling problems
Message-ID: <52638@sun.uucp>
Date: 10 May 88 15:22:32 GMT
References: <2465@mit-amt.MEDIA.MIT.EDU>
Sender: news@sun.uucp
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
Organization: Sun Microsystems, Mountain View
Lines: 19

In article <2465@mit-amt.MEDIA.MIT.EDU> (Darren L. Leigh) writes:
> I am trying to create a hi-res, interlaced horizontally scrolling
> display ... When the bitmap I am using is 1024 or fewer pixels wide, 
> the display is fine ... When the bitmap is 1025 or more pixels wide,
> I get junk ...

Darren, you can't scroll a bitmap that is more than (actually 1008 
pixels wide) The reason being that the blitter cannot handle it.
When the new blitter/Agnus becomes available this will be possible
but it isn't yet. With custom blits you can play games with multiple
bitmaps although I suspect you can do that now since you can't display
a 1024 wide bitmap yet. 

Hashing occurs when you don't wait for the bottom of the frame before
scrolling.

--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.