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- Path: informatik.tu-muenchen.de!fischerj
- From: fischerj@Informatik.TU-Muenchen.DE (Juergen Fischer)
- 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: 12 Apr 1996 16:45:51 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4km1bv$irf@sunsystem5.informatik.tu-muenchen.de>
- References: <4iu7hb$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>
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-
- Darwin Ouyang (douyang@novice.uwaterloo.ca) wrote:
- : In article <4jsj9c$i7q@sunsystem5.informatik.tu-muenchen.de>,
- : Juergen "Rally" Fischer <fischerj@Informatik.TU-Muenchen.DE> wrote:
-
- : >: >a 640*512 physical screen? 50 frames / sec scroll, with 0 CPU or AGA time.
- : >The nice thing is that the Amiga DOES it while all programs I
- : >saw on VGA (linux/x) use the blitter.
-
- : And how does the Amiga "DO" this? Without the blitter?
-
- No, with the copper. heard of it ? :)
-
- : >Even if the VGA blitter was fast enough, all current OS-based screens
- : >jerk just because the mouseupdate is not display synced. (timer, no
- ok, I used wrong words. "doesn't run at display sync speed, eg. 60Hz".
-
- : >vblank interrupt used).
-
- : synced. (With PCI video cards, interrupt sharing is not a problem.)
-
- Be honest people, which of your PCs+OS makes use of a vblank interrupt ?
-
- : And if the mouse is a hardware cursor (driver support) it won't flicker
- : either.
- yes. not flicker. jerk.
-
- : >yes, and the Amiga one allows use of custom hardware => 50Hz.
- : >I also vote for API driven special hardware.
- : ^^^^^^^^^^^^^^^^^^^^^^^^^^^
- : This is EXACTLY what an accelerated SVGA video card is.
-
- yes, even under DOS, using VESA, kind of small API.
-
- : Darwin Ouyang
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
-