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- Newsgroups: nz.comp
- Path: sparky!uunet!comp.vuw.ac.nz!canterbury.ac.nz!betelgeux!cree
- From: cree@elec.canterbury.ac.nz (Michael Cree)
- Subject: Re: What computer is the "Coruba, DO DA" ad done on?
- Message-ID: <BzDsD6.C2D@cantua.canterbury.ac.nz>
- Nntp-Posting-Host: betelgeux.canterbury.ac.nz
- Organization: Electrical Engineering, University of Canterbury, New Zealand
- X-Newsreader: TIN [version 1.1 PL8]
- References: <1992Dec17.134730.12855@waikato.ac.nz>
- Date: Thu, 17 Dec 1992 02:03:05 GMT
- Lines: 26
-
- Lawrence D'Oliveiro, Waikato University (ldo@waikato.ac.nz) wrote:
- > That 2000 frame-per-second rate would apply if you were just changing a
- > copper-list register to point to a different image which is already in chip
- > RAM (and as someone else has pointed out, 500 microseconds is really pretty
- > slow for such a simple operation). Thus any claim that an Amiga can animate at
- > this speed for any length of time (even with unlimited fast RAM) can't be the
- > whole truth, and I claimed no more than this.
-
- As I understand it that figure is for copying from a memory buffer
- into the display buffer as I explained in a previous reply to your
- posting. If it was just changing the copper list it could be done
- probably close to a million times per second (since that is how long
- the operation takes) or only 50 times per second (since changing
- copper lists is normally tied to vertical blanking) and either case
- you are wrong. As to claims that an Amiga can't animate may I point
- out that if a 486 can do the animation then it will be no problem for
- a fast Amiga.
-
- > Lawrence D'Oliveiro fone: +64-7-856-2889
-
- -----------------------------------------------------------------------------
- Michael Cree Gold there is
- cree@elec.canterbury.ac.nz and rubies in abundance;
- But lips that speak knowledge
- are a rare jewel. (Prov 20:15)
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-