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- Path: informatik.tu-muenchen.de!fischerj
- From: fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Demo/game to OS frien
- Date: 23 Feb 1996 01:06:54 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4gj3ve$f9c@sunsystem5.informatik.tu-muenchen.de>
- References: <38232498@kone.fipnet.fi> <4gctlm$bcn@oreig.uji.es> <38232604@kone.fipnet.fi>
- NNTP-Posting-Host: hphalle5.informatik.tu-muenchen.de
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-
- Jyrki Saarinen (jsaarinen@kone.fipnet.fi) wrote:
-
- : > c2p8.s is too slow for 25 fps effects (due to blitter speed).
- : > For this 3 CPU passes and one blitter pass is better.
-
- : Yep. I still believe 030/50 could do free c2p by doing
- : three passes with the CPU and the last one with the blitter.
- : This one would not limit the frame rate too much either.
-
- : Hmm. I calculated that those 2 blitter passes limit to 25fps
- : in c2p8.s in 320x128x8, but you are talking about 320x256x256
- : I guess?
- one pass (without cpu doing chipacess!) 320x256x8planes needs
- almost exactly 0.04s, i.e 25fps. copying to chipmem by 030
- will need 0.014s, when assuming 6mb/sec. Well, doing 3 passes
- maybe 030-50 will drop down a bit.
-
- REQUEST: Those who said 030-50 does 2 passes for free, does
- this mean at 7mb/sec if no plane dma ? Ludde said 4-5ms, but thats
- rather 4.4mb/sec! Anyone knos if a 040/25 can do 7mb/sec c2p if
- sitting in A1200 (the real Ami :-> ) ?
- END REQ.
-
- I guess blitter doing 1 pass will need 0.05 sec including cpu interference ?
- would mean 20fps.
-
- : > Peter uses PC relative addressing in his c2p8.s to get the
- : > current task and signal bits, but AFAIK I can't do this in E...
-
- mhm, why not just use global variables.
-
- Why you can't do this in E ?
-
- : It is quite a easy job to hack the source a bit to all
- : applications..
-
- : -- _
- : a Stellar programmer _ //
- : "Amiga - back for the future" \X/
-