Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!ucbcad!ucbvax!CORY.BERKELEY.EDU!dillon
From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga
Subject: Re: Double Buffering
Message-ID: <8711080404.AA23969@cory.Berkeley.EDU>
Date: Sat, 7-Nov-87 23:04:58 EST
Article-I.D.: cory.8711080404.AA23969
Posted: Sat Nov  7 23:04:58 1987
Date-Received: Tue, 10-Nov-87 05:17:20 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 16

>I almost hate to do this but would someone please make a simple statement
>concerning what the Amiga term "copper" means?  What did the name derive from
>and what is it?  And now, back to Double Buffering...

	Copper.  Co-Processor.  The amiga has a simple three-instruction
co-processor which handles changing between screens in the middle of a 
display refresh.  Each screen has a copper list which is executed at the place
the screen physically starts on the screen, loading the plane pointers and
colormap for that screen into the video chip.

	The graphics.library handles the copper.  You really have to get
into the guts of the Amiga to use it (beyond the Screen structure and into
the View structure).

					-Matt