home *** CD-ROM | disk | FTP | other *** search
- Path: news.eunet.fi!fipnet!kone!jsaarinen
- Newsgroups: comp.sys.amiga.programmer
- X-NewsReader: IntuiNews 1.2b (31.7.94)
- References: <38232736@kone.fipnet.fi> <4hh592$8j6@serpens.rhein.de>
- From: "Jyrki Saarinen" <jsaarinen@kone.fipnet.fi>
- Date: Sat, 16 Mar 96 12:30:10 UT
- Comments: Illegal date header - new date added by quicknews
- X-Original-Date: Fri, 15 Mar 96 17:55:51
- MIME-Version: 1.0
- Content-Type: text/plain; charset=iso-8859-1
- Content-Transfer-Encoding: binary
- Subject: Re: Wolfenstein Texture mapping problem
- Message-ID: <38233038@kone.fipnet.fi>
-
-
- > >> I do write into a fastram buffer and then copy it to the card ram
- > >>áwith word writes. The Picasso is ZII, so word writes are better than
- > >>ábyte writes. I can directly access the picasso memory, as a linear
- >
- > >The question is, why not longword copies?
- >
- > Because a word write might interleave with other bus cycles.
-
- How about this?
-
- move.l (a0)+,d0 ;chunky buffer, 4 pixels
- move.w d0,(a1)+ ;Picasso memory
- move.w d0,(a1)+
-
- Might, yes.. But I think that 3.5MB/s to ZII can be had with
- both move.l (a0)+,(a1)+ or move.l (a0)+,d0;
- move.w d0,(a1)+; move.w d0,(a1)+.
-
- -- _
- a Stellar programmer _ //
- "Amiga - back for the future" \X/
-