From:	"Alexei A. Frounze" <alex DOT fru AT mtu-net DOT ru>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: 3rd Try: Maybe an asm problem? (Problems linking)
Date:	Sun, 30 Apr 2000 05:08:48 +0400
Organization:	MTU-Intel ISP
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To:	djgpp AT delorie DOT com
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Joseph Rose wrote:
> 
> "Alexei A. Frounze" wrote:
> 
> > Joseph Rose wrote:
> > > BTW, How do I change the screen mode without an INT 10h or int86x?
> >
> > Either using __dpmi_int() or outportb() (if you know what to output to the gfx
> > card) :)).
> >
> 
> I mean what do I output to the card?  I have a minimal documentation of the card's
> registers, but I don't have certain necessary ratios or a categorized list of
> registers to affect for a particular purpose.  

Unfortunately, seems that only designers know how to switch to a particular
text/gfx mode. Even I don't know how to switch to any VGA mode using VGA
registers, although I worked with those registers quite long and I have some
books about all this stuff.

Why do you need to setup a mode w/o BIOS?

> BTW, doesn't __dpmi_int switch to
> real or virtual mode and do an interrupt (INT ##)?

Yes, it does. :) int*86*() also does the same because your program runs in
PMode, so you must do a switch to RM/VM in order to access BIOS services. 

bye.
Alexei A. Frounze
-----------------------------------------
Homepage: http://alexfru.chat.ru
Mirror:   http://members.xoom.com/alexfru

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