Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!uunet!mcsun!unido!math.fu-berlin.de!fub!einoed!buchonia.rhoen.in-berlin.de!fulmin!apd!saarag!m_gietzen
From: m_gietzen@saarag.zer.sub.org
Newsgroups: comp.sys.amiga.hardware
Subject: re: Using the copper
Message-ID: <9104011518.35.1541@SAARAG>
Date: 2 Apr 91 09:59:42 GMT
Sender: news@buchonia.rhoen.in-berlin.de (News Administration)
Distribution: comp
Organization: fulmin Ebersburg/Rhoen
Lines: 18


  
Once a guy asked about the reason of using the copper.

I program games and know sth. about this wonderfull customchip.
The simplest effect is the use of different palettes and different 
screens in different resolutions.
You can mirror pictures without any processingtime, stretch pictures,
rotate them and so on.
Another great ability of the copper is that it is able to leave 
interrupts. So you can exactly start a routine at the same 
rasterpositon. (see rasterirqs on the C64...)

Ciao,

		    Markus Gietzen

PS: Sorry for my bad english!