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- Path: arco7.cc.bbsrc.ac.uk!enger
- From: enger@arco7.cc.bbsrc.ac.uk (john enger)
- Newsgroups: comp.sys.amiga.programmer,comp.sys.amiga.games,alt.sys.amiga.demos,in,comp.sys.amiga.advocacy,comp.sys.amiga.hardware,comp.sys.amiga.misc,comp.sys.amiga.graphics
- Subject: Re: Possible loss of the Copper (was Re: AB3D II beats Quake....)
- Followup-To: comp.sys.amiga.programmer,comp.sys.amiga.games,alt.sys.amiga.demos,in,comp.sys.amiga.advocacy,comp.sys.amiga.hardware,comp.sys.amiga.misc,comp.sys.amiga.graphics
- Date: 16 Apr 1996 10:26:41 GMT
- Organization: BBSRC Biotechnology and Biological Sciences Research Council
- Message-ID: <4kvsl1$2pk@is.bbsrc.ac.uk>
- References: <4iu7hb$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>
- Reply-To: john.enger@bbsrc.ac.uk
- NNTP-Posting-Host: arco7.cc.bbsrc.ac.uk
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-
- Stefan Boberg (boberg@team17.com) wrote:
- : fischerj@Informatik.TU-Muenchen.DE (Juergen Fischer) wrote:
- : >Darwin Ouyang (douyang@novice.uwaterloo.ca) wrote:
-
- : >: <About virtual screens>
-
- : >: And how does the Amiga "DO" this? Without the blitter?
-
- : >No, with the copper. heard of it ? :)
-
- : No it doesn't. It does use the copper to *load* the scroll
- : registers, but how that is different (or better) than loading the
- : (hold) scroll registers directly with the CPU, I don't know.
-
- Because it frees the CPU for other things?
-
- : The end
- : result is the same, as the (S)VGA scroll values are copied to the
- : pixel address register at VRetrace time just like on the Amiga.
-
- --
- ========================= john.enger@bbsrc.ac.uk =====================///===
- A1200, 40 Mhz '030, 2+12Mb RAM, 80Mb HD, 1960 MSync Monitor ///
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