Path: utzoo!utgpu!news-server.csri.toronto.edu!qucdn!leek Organization: Queen's University at Kingston Date: Thursday, 23 May 1991 13:16:44 EDT From: Message-ID: <91143.131644LEEK@QUCDN.QueensU.CA> Newsgroups: comp.sys.amiga.advocacy Subject: Re: Blitter vs. 040 (was: Computer Architecture question References: <4954@orbit.cts.com> <1991May23.075950.4177@cs.umu.se> In article <1991May23.075950.4177@cs.umu.se>, dvljrt@cs.umu.se (Joakim Rosqvist) says: >>busses with 2 seperate processors on them means there should be little bus >>contention. the only time the cpu NEEDS to access chip memory is to program >>the blitter, and that's only for a few cycles. >> Unless you have a > 68000 processor, execbase (and exec ??) still have to sits down there in chip as are the interrupt/exception vectors among other stuff. I think you can move the vectors elsewhere with the 030 or above. (Not sure about the 020) Hopefully that is a small percentage of use. >It doesn't need to access chip ram even then. The blitter-control registers >are in the $dff area, not in chip ram. > >/DR. Hex >-------------------------------------------- >Email to: dvljrt@cs.umu.se >2 Windows on the screen? Oh no, not me. I just Logout & Go.