Article View: comp.sys.amiga.graphics
Article #9277Re: Possible loss of the Copper (was Re: AB3D II beats Quake....)
From: K. C. Lee
Date: Thu, 18 Apr 1996 09:37
Date: Thu, 18 Apr 1996 09:37
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1981 bytes
Juergen "Rally" Fischer (fischerj@informatik.tu-muenchen.de) writes: > > Yep. no blitterscrolling. I currently sit on a hp. I can see it uses > the blitterscrolling for virtual screen. this saves vram but is slow. How much VRAM is on that HP and what res. is it running ? > when there's much load virtual screen will jerk like hell. > This would never happen on a Amiga. Translate it to the same resolution on the Amiga (if it works at all), how much of scrolling can you affort to do limited by 2 meg of chip RAM ? The SVGA accelerators has the same horizontal & vertical scrolling capabilities in the register level. > > True, for one single screen cpu could do it. It's done by copper > due to the vport concept (different resolution areas on screen). > > Reloading all screenspecs (256 color palette!) would cost cpu time, > so copper makes sense here. But the bandwidth available to load the 256 colours is considerably more on a SVGA chipset. The Copper is not exactly fast on that, otherwise dynamic highres (old NewTek thing) would have been possible with the Copper. > fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)> K. C. Lee
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Path: arc1-ca.pugleaf.net!FreeNet.Carleton.CA!de351 From: de351@FreeNet.Carleton.CA (K. C. Lee) Newsgroups: comp.sys.amiga.graphics Subject: Re: Possible loss of the Copper (was Re: AB3D II beats Quake....) Date: 18 Apr 1996 09:37:11 GMT Organization: The National Capital FreeNet Sender: de351@freenet6.carleton.ca (K. C. Lee) Message-ID: <4l52g7$579@freenet-news.carleton.ca> References: <4iu7hb$utt@coranto.ucs.mun.ca> <2726.6661T189T1181@mbox.vol.it> <4jmkma$4s0@valour.pem.cam.ac.uk> <4jsj9c$i7q@sunsystem5.informatik.tu-muenchen.de> <DpBp8G.7qK@novice.uwaterloo.ca> <4km1bv$irf@sunsystem5.informatik.tu-muenchen.de> <4kom17$rg@hell.team17.com> <4ktn7m$bfj@sunsystem5.informatik.tu-muenchen.de> Reply-To: de351@FreeNet.Carleton.CA (K. C. Lee) NNTP-Posting-Host: freenet6.carleton.ca