Mail Archives: djgpp/1995/09/04/18:26:35

Date: Sat, 2 Sep 95 07:33 MDT
From: mat AT ardi DOT com (Mat Hostetter)
To: Timothy Wilson <wilsont AT rahul DOT net>
Subject: Re: Graphics in v2.0
Newsgroups: comp.os.msdos.djgpp
References: <DE242E DOT CII AT jade DOT mv DOT net> <420l92$f04 AT bug DOT rahul DOT net> <427g3j$5n0 AT krel DOT iea DOT com> <DE8wHp DOT M79 AT jade DOT mv DOT net> <4288nr$6r8 AT bug DOT rahul DOT net>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

Timothy Wilson <wilsont AT rahul DOT net> writes:

 > Hey, it works, here is the code AGAIN!!
 > _go32_dpmi_registers regs;
 > unsigned short dos_sel;
 > void gfx_mode(char mode)
 >   {
 >   dos_sel=_go32_conventional_mem_selector();
 >   _go32_dpmi_simulate_int(0x10, &regs);
 > }
 > This DOES work, I use it DAILY!!!

I'm sure it does, but that's not the code to which people are
referring.  Here's that code, verbatim, from a previous post by you:

 > I don't do any of that, for both 1.6 and 2.0 I've used:
 > char * screen
 > screen=(char*)0xa0000;
 > screen[x+y*320]=somecolor;
 > As long as I set stuff up with a INT 10 call it works fine, no need
 > to muck with this near/far pointer crapola. *bleh* This is GCC
 > after all, not DOS. :)

The technique indicated in this code won't work (under DJGPP), which
is what the other poster discovered when he tried to write a test
program based on your advice.


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