Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!unido!fauern!lan!rommel
From: rommel@lan.informatik.tu-muenchen.dbp.de (Kai-Uwe Rommel)
Newsgroups: comp.os.os2.programmer
Subject: Re: Using VioSetMode
Message-ID: <6579@tuminfo1.lan.informatik.tu-muenchen.dbp.de>
Date: 15 Jan 91 13:33:55 GMT
References: <2593@excelan.COM>
Sender: news@lan.informatik.tu-muenchen.dbp.de
Reply-To: rommel@lan.informatik.tu-muenchen.dbp.de (Kai-Uwe Rommel)
Distribution: comp.os.os2.programmer comp.os.os2.misc
Organization: Inst. fuer Informatik, TU Muenchen, Germany
Lines: 28

In article <2593@excelan.COM> colin@la.excelan.com (Colin Goldstein) writes:
>I have a question about using VioSetMode. I find that it only works
>some times. If I have the display in 80*50 mode and use VioSetMode
>to change it to 80*25, it works. However, if I'm in other modes such
>as 80*34 it does not work at all. And if I'm in 80*12 or 80*43, it
>only partially works. Although the screen changes to the correct 
>number of lines, the font is not the default font.

>   viomi.cb = sizeof(viomi);
>   VioGetMode(&viomi, 0);
>
>   viomi.row = 25;
>   viomi.col = 80;
>   VioSetMode(&viomi, 0);

Try setting the hres and vres fields (screen pixel width/height) to to
appropriate values. For example, while 80x25 and 80x50 both work with
720x400, 80x34 works with 720x480! This should solve your problem.
Always calculate hres and vres from row/col and the font size (9x16,
9x14 and 9x8); hres is always 720 on VGA, vres has to be set by you.

Kai Uwe Rommel

--
/* Kai Uwe Rommel, Munich ----- rommel@lan.informatik.tu-muenchen.dbp.de */

DOS ... is still a real mode only non-reentrant interrupt
handler, and always will be.                -Russell Williams (MS)