Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!samsung!uakari.primate.wisc.edu!sdd.hp.com!wuarchive!psuvax1!rutgers!cbmvax!cbmehq!cbmger!peterk From: peterk@cbmger.UUCP (Peter Kittel GERMANY) Newsgroups: comp.sys.amiga.hardware Subject: Re: Breaking through the chip-bus barrier? Message-ID: <1243@cbmger.UUCP> Date: 24 May 91 08:57:09 GMT References: <1991May21.081806.2668@kberg.se> <1991May23.045536.1208@uniwa.uwa.oz> <1991May23.121032.31010@kuhub.cc.ukans.edu> Reply-To: peterk@cbmger.UUCP (Peter Kittel GERMANY) Organization: Commodore Bueromaschinen GmbH, West Germany Lines: 19 In article <1991May23.121032.31010@kuhub.cc.ukans.edu> markv@kuhub.cc.ukans.edu writes: > > [Some well balanced arguments of bitplanes vs "chunky pixels" deleted] > >As for the discussion on CHIP architechures, simply modifing CHIP RAM >to use VRAMs and Denise to take her DMA from the serial shift lines >would drastically speed up drawing, since the CPU and Blitter would >get massivlely increased available bandwidth (esp in higer res/color modes). But I fear VRAMs are not possible, because Denise not only fetches the normal video data from Chip-RAM (this could indeed also be taken from VRAMs), but it also must display sprites and fetch their data from quite different places, so the VRAM mechanism is impossible for this. Also all the copper actions (copper list fetched from Chip-RAM!) are certainly at least difficult to implement on VRAM/Denise combinations. -- Best regards, Dr. Peter Kittel // E-Mail to \\ Only my personal opinions... Commodore Frankfurt, Germany \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk