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Article View: comp.sys.atari.st
Article #2583

Blitter Info

#2583
From: Chuck McManis
Date: Mon, 24 Jul 1989 22:12
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With the Megas being "old technology" now, and the Atari blitter being
at least a reasonably well known thing. Could someone who really knows
what this thing can do describe it? If you are aware of other blitters
(Xerox, Commodore) could you compare them? 

Some of the questions I am particularly interested in :
	- Does the blitter have a barrel shifter to do bit aligned
	  transfers?
	- What restrictions are there are arbitrarily aligned rectangles
	  if any?
	- What logical operations does it support? Are any of them numeric
	  such as T.I.'s PixBlt stuff?
	- How do the blitter and 68000 get along, especially on the memory
	  bus?
	- How fast is it? How many clocks/byte does it transfer?
	- How many sources/destinations does it support?
	- How much does it affect overall system performance?

Any info appreciated,


--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.
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From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: comp.sys.atari.st
Subject: Blitter Info
Keywords: Finally?
Message-ID: <117440@sun.Eng.Sun.COM>
Date: 24 Jul 89 22:12:39 GMT
Sender: news@sun.Eng.Sun.COM
Lines: 25