From:	Alberto Chessa <achessa AT fiar DOT finmeccanica DOT it>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: vesa 2.0 development
Date:	Tue, 04 May 1999 11:35:48 +0200
Organization:	TISCALI S.p.A.
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Message-ID:	<372EBF74.8CF8B277@fiar.finmeccanica.it>
References:	<372E36D8 DOT D046D9AA AT nothingreal DOT com>
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To:	djgpp AT delorie DOT com
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Francois wrote:

> i'm currently rewriting my vesa2.0 library
> under djgpp v2....
> but i face a problem when i need to use the ints ...
> for example to get vesa info i must do :
>
>     ax = 4f00h
>     es:di = ptr to buffer
>     int 10h
>
> the int seems to works fine as at the end
> ax = 004fh
> but the buffer is not filled ...
> how to give the int the right es:di ????

Do You use a conventional memory buffer ?

DOS calls can use conventional memory buffer only. Use _tb (defined in
go32.h) as transfer buffer and then move it to your actual buffer  (
regs.x.di = __tb & 0x000F; regs.x.es = (__tb >> 4) & 0xFFFF;). Look at
"Graphic Programming in DJGPP" by Jeff Weeks
(http://www.gameprog.com/codex/tut/chapter.html).

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