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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: Find better sollution
- Date: 18 Jan 1996 18:21:57 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4dm345$pqa@sunsystem5.informatik.tu-muenchen.de>
- References: <4cj85q$2q3@sinsen.sn.no> <4cmb12$kf7@news.isc.rit.edu>
- NNTP-Posting-Host: hphalle5.informatik.tu-muenchen.de
- Originator: fischerj@hphalle5.informatik.tu-muenchen.de
-
-
- In article <4cmb12$kf7@news.isc.rit.edu>, mjp3783@alpha.isc.rit.edu writes:
- |> Organization: Rochester Institute of Technology
- |> Lines: 31
- |> Message-ID: <4cmb12$kf7@news.isc.rit.edu>
- |> References: <4cj85q$2q3@sinsen.sn.no>
- |> Reply-To: mjp3783@alpha.isc.rit.edu
- |> NNTP-Posting-Host: alpha.isc.rit.edu
- |>
- |> In article <4cj85q$2q3@sinsen.sn.no>, tbk@sn.no (Thore Bjerklund Karlsen) writes:
- |> >(Michael van Elst)
- |> >
- |> >>>>movep was intended for 6800 style I/O chips that can't be used
- |> >>>>easily with the 68040 and 68060 anyway.
- |> >
- |> >>>Not an excuse.
- |> >
- |> >>Excuse ? Not to satisfy the needs of c00l c0d3rz ? Or what ?
- |> >
- |> >To break every single program which uses this instruction, not
- |> >necessarily written by a "cool coder". Maybe it's not the most used
- |> >instruction, but you should get the picture. Everybody except you
- |> >probably understood what I mean several postings ago. You just like to
- |> >argue.
-
- movep could be used for quick extending a picture to 2x1 ghost look.
- interesting for 2x1 emulation on gfx-cards (if vram is as fast as fastmem).
- why should usage of this instruction for this purpose be an illegal hack ?
-
- |>
- |> The instruction was designed to move data to a peripheral. If you used it for
- |> something else, then your code was not designed according to Motorola specs.
-
- what's the difference between peripheral and mem to a motorola cpu ? none.
- if movep would also touch the bytes between the ones beeing written, you
- maybe could not complain (exept movep was defined to really do .b access
- which I don't know).
-
- |> I think that they found that no one was using it (Mac, Amiga, etc) for its
- |> intended purpose (because we aren't using 8 bit peripherals), so they dropped
- CIA ?
-
- |> it to make more room on the chip (my guess).
-
- so the opcode calls a vector I hope.
-
- |>
- |>
- |>
- |> >
- |> >__
- |> >\\\__ Thore B. Karlsen % tbk@sn.no % C64-C128D-A1200-A2000C
- |> > \XX/ Wowbagger/AFL&SSN % -c0d3r- % A1230/50MHz-2C4F/340MB
- |> >
- |> >Mal.2.3: Behold, I will corrupt your seed, and spread dung upon your faces
- |> >
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
-