Xref: news2.mv.net comp.os.msdos.djgpp:1164
From: brennan AT mack DOT rt66 DOT com (Brennan "Mr. Wacko" Underwood)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Beginning graphics question
Date: 13 Feb 1996 20:04:52 -0700
Organization: None, eh?
Lines: 49
Message-ID: <4frjgk$j1o@mack.rt66.com>
References: <4fbqgg$ljm AT dziuxsolim DOT rutgers DOT edu> <DMGsKG DOT nED AT natlab DOT research DOT philips DOT com> <311E4482 DOT 4B0F AT unm DOT edu>
NNTP-Posting-Host: mack.rt66.com
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <311E4482 DOT 4B0F AT unm DOT edu>,
<strider7 AT unm DOT edu> (Not his real name) wrote:
>Pieter Kunst wrote:
>> 
>> In article <4fbqgg$ljm AT dziuxsolim DOT rutgers DOT edu> Anthony Cowley <acowley AT erclab DOT rutgers DOT edu> writes:
>> >
>> >Please, I'm not looking for libraries to do everything for me.  I'm a
>> >do-it-yourself kind of guy, so I'd like to use my existing routines.  I just
>> >need the info above to continue.
>> >
>> >Plus, I'm a total newbie when it comes to 32-bit coding, so I have no clue
>> >here.  What should I know?  Or where can I get the file that tells me that?
>> >
>
>I know how ya feel, ok, you can't access the video mem the same.  V2 
>has far pointer functions, they act like far pointers.  It goes 
>something like this.
>
>#include <sys\farptr.h>   // far pointer functions
>#include <go32.h>         // _dos_ds, dos selector
>
>int screen= 0xa0000;
>
>int main()
>{
> _farsetsel(_dos_ds);     // set up selector for _farnspokeb
> set_video_mode(0x13);
>
> _farnspokeb(screen, 2);  // "pokes" video mem with a green pixel
>
> set_video_mode(0x03);
>
> return 0;
>}
>
>you are prolly saying, "I don't want to use functions, I want to write 
>directly to memory!"  Well, don't worry, compile your programs with 
>the -O3 and the far functions are lightening fast, just me, if you 
>don't trust me, trust DJ.  Also, look at the sys\farptr.h file.

You can find a slightly more eloquent (but not much) version of this at
http://www.rt66.com/~brennan/djgpp/

Plus a bunch of other nifty DJGPP+games related stuff.


--brennan
-- 
brennan AT rt66 DOT com  |  "Disco Stu doesn't NEED to advertise."