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- Path: ifi.uio.no!usenet
- From: ludvigp@ifi.uio.no (Ludvig Pedersen)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: doubling pixels horizontally
- Date: 21 Feb 1996 19:22:54 GMT
- Organization: Dept. of Informatics, University of Oslo, Norway
- Message-ID: <2038.6625T1088T2898@ifi.uio.no>
- References: <4f4ibc$gl9@news.cs.tu-berlin.de> <591.6610T1165T2102@login.eunet.no><1045.6611T753T2256@vip.cybercity.dk><4faoe1$47@sunsystem5.informatik.tu-muenchen.de><2991.6612T1034T625@vip.cybercity.dk><576.6613T1070T1730@login.eunet.no><1257.6614T57T922@vip.cybercity.dk><1225.6615T1229T800@login.eunet.no><1140.6616T51T1538@vip.cybercity.dk>
- <3764.6622T781T478@ifi.uio.no> <4gbkq8$104@sunsystem5.informatik.tu-muenchen.de>
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-
- >Ludvig Pedersen (ludvigp@ifi.uio.no) wrote:
- >: >AGA 64bit sprites (and what a hard work that was).
- >: No the source was kind of weird, several asm-instructions on the same line
- >: etc! :)
- >I _KNEW_ that was the reason why you call the source bad!
- >If you would have read the docs, you'd have read that I even
- >provided the converter ;)
- Yes, and I used it! ;) It was still terrible!!! (Sorry no personal offence)
-
- >Tell me what you want, people, multiple instructions in line rulz,
- >just like any C code does. You get more source code overview
- >once you learned to read this style.
- I don't agree at all.
-
- >: How are you going to handle 64 pixels width sprites?
- >by hacking fmode...
- >: What about double pixel height?
- >by hacking fmode & modulos..
- >: What about multisync?
- >no way! unless you are a mega intuition-monitor-expert and maybe
- >write a new ghost-look routine for each kickstart-revision :\
- Its possible without being an expert.
-
- You have to set up 2 different UserCopperList.
- One for normal modes (PAL/NTSC etc) and one for double-scan modes.
- (DBLPAL/DBLNTSC)
-
- No big deal. And you already know how the modulo registers work in double-scan
- mode.
-
- >Afaik no way to get it OSy.
- When you have already hacked out FMODE and MODULOs. You don't need to do more
- hacking to make it work in multisync.
-
- >: Intuition screens are often promoted to another screenmodes.
- >: Have you thought about that the modulo registers work different in
- >: scandoubling modes like DBLPAL, DBLNTSC?
- >In DBLPAL you need to display same line _4_ times to let it look
- >like normal 2x4.
- No real problem. If you use a UserCopperlist.
-
- >: There is a lot of things to think about! :(
- >you can't think about all things.
- >Do it for PAL and provide 4 pass solution for other monitors.
- I guess you don't have a Multisync? Just like the coder how put their code
- sections in chipram because they don't have any fast memory! :-/
-
- Just try, it isn't much harder than PAL.
-
-
- <sb>Ludde - Amiga Demo Coder
- <sb>Virtual Reality & Official Be developer
- <sb>ludvigp@ifi.uio.no
-
-