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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: Q: C2P MUCH FASTER?
- Date: 15 Feb 1996 17:33:27 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4fvqp7$nag@sunsystem5.informatik.tu-muenchen.de>
- References: <311B354C.FD@munich.netsurf.de> <474.6617T629T2577@vip.cybercity.dk>
- NNTP-Posting-Host: hphalle5.informatik.tu-muenchen.de
- Originator: fischerj@hphalle5.informatik.tu-muenchen.de
-
-
- In article <474.6617T629T2577@vip.cybercity.dk>, ccc6004@vip.cybercity.dk (Hans Henrik Happe) writes:
- |> Organization: CyberCity of Denmark
- |> Lines: 17
- |> Message-ID: <474.6617T629T2577@vip.cybercity.dk>
- |> References: <311B354C.FD@munich.netsurf.de>
- |> NNTP-Posting-Host: 194.16.56.134
- |> X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
- |>
- |>
- |> ML ( Manfred.Linzner@munich.netsurf.de ) wrote:
- |> > I trying to find a fast c2p routine which produces 2*1 in 256 colors.
- |>
- |> > Question:
- |> > ---------
- |> > Is there any sense to use an superhires (1024*y) screen for a c2p
- |> > conversion?? This means you could write a byte at once to
- |> > get a double-width lowres pixel.
- |> > Could this be faster than normal c2p routines with an ordinary 320*y
- |> > screen?
- |>
- |> Nope!... way too many chipmem writes ;(
-
- not. 1 byte/2x1 pixel block. the needed 3 planes SHRES don't use much
- planedma, no prob.
-
- you directly write a byte to chipmem, not any blitterpasses nor cpu passes.
-
- BUT: only about 8 colors mixed out of 4 colors. TV-errors like ghost-look
- (or worse. mixed colors might look different on different monitors, well
- use 1084 as standard ;)
-
- |>
- |> Hans Henrik Happe
- |> Alias Goat / Sumpen
- |>
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
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