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- Path: everest.vol.it!news
- From: bizzetti@mbox.vol.it (Fabio Bizzetti)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Wolfenstein Texture mapping problem
- Date: 17 Mar 1996 23:15:20 GMT
- Organization: Video On Line
- Distribution: world
- Message-ID: <1669.6650T1194T2853@mbox.vol.it>
- References: <38232736@kone.fipnet.fi> <4hh592$8j6@serpens.rhein.de> <38233038@kone.fipnet.fi>
- NNTP-Posting-Host: molcl7.vol.it
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
-
- >> >> 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
-
- SWAP D0 ;you forgot, and it's 4 cicles on 68020/68030..
-
- > 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)+.
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- ------------------------------------------------------------------------------
- | |
- | Stop that fucking imperialist embargo against Cuba. |
- | Hasta Siempre Comandante Che Guevara. |
- | |
- | |
- | Fabio "Maverick" Bizzetti - bizzetti@mbox.vol.it - Maverick* at IRC |
- | The maker of "CyberMan" and "Virtual Karting" |
- | working on "Virtual Rally" and "StarFighter", the 3D game that will |
- | bring the Amiga to the top |
- | |
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