Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!cs.utexas.edu!uunet!mcsun!sunic!tut!hydra!hylka!pkontkanen
From: pkontkanen@cc.helsinki.fi
Newsgroups: comp.sys.amiga.tech
Subject: Textscroll & interrupt
Message-ID: <1593.257a71a6@cc.helsinki.fi>
Date: 4 Dec 89 13:31:18 GMT
Organization: University of Helsinki
Lines: 12


	I want to make a textscroll routine, that uses blitter. I have an off-
screen bitmap from which the characters should be copied to the on-screen
bitmap. How is this routine actually made? I think I have to use bit shifts and
masks but how? 
	Another question. I saw once a demo source, which initialized an
interrupt routine to the address $6C (autovector, level 3). What's the meaning
of it? Could it be useful for my textscroll routine ?

					    Petri Kontkanen
					    The University of Helsinki, Finland