Path: utzoo!attcan!uunet!tektronix!tekig5!brianr
From: brianr@tekig5.PEN.TEK.COM (Brian Rhodefer)
Newsgroups: comp.sys.amiga
Subject: Re: Blitter Feature (was: Re: A-Talk III 1.0e)
 -> Any program (not just terminal programs, but editors and others
 -> as weell) that scrolls more than one bitplane will exhibit thei
 -> "feature" of blitter copying.  I guess unless the blitter operation
Message-ID: <3690@tekig5.PEN.TEK.COM>
Date: 18 Jan 89 03:20:40 GMT
Organization: Tektronix Inc., Beaverton, Or.
Lines: 18


 <-- Marco Papa 'Doc'>

Why isn't it possible to paint the new information into non-displayed
lines of an oversize screen, taking however long, and then readjusting
the pointers that the video generation system resets from at the Top
Of Frame, such that a different section of the screen gets displayed?

It seems to me that even all five bitplane pointers could be reloaded
during vertical retrace, eliminating the `partially-moved bitplanes'
effect.

Am I missing something?

Naively,


Brian Rhodefer   ...!tektronix!tekig5!brianr