Xref: utzoo alt.msdos.programmer:820 comp.sys.ibm.pc:39348
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde!uunet!mcsun!sunic!tut!hydra!hylka!teittinen
From: teittinen@cc.helsinki.fi
Newsgroups: alt.msdos.programmer,comp.sys.ibm.pc
Subject: Re: i/o routines and non-standard video modes
Message-ID: <1599.257bae5a@cc.helsinki.fi>
Date: 5 Dec 89 12:02:34 GMT
References: <2090@calvin.EE.CORNELL.EDU> <2980@einstein.ptolemy.arc.nasa.gov> <2092@calvin.EE.CORNELL.EDU> <2544@alva.tut.fi> <89320 <1494@cc.helsinki.fi> <89338.051609CMH117@PSUVM.BITNET>
Organization: University of Helsinki
Lines: 24

In article <89338.051609CMH117@PSUVM.BITNET>, CMH117@PSUVM.BITNET 
(Charles Hannum) writes:
> In article <1494@cc.helsinki.fi>, TEITTINEN@cc.helsinki.fi (Marko) says:
>>
>>I don't think screen handling is terribly slow in DOS 4.0, but it knows
>>whether the screen is in 80*25 or 80*50 line mode. Easy to use (command
>>is "mode ,50", but too few programs check whether they are running on
>>80*25 or 80*50 line screen. Of course, all DOS programs do it,
>>especially more.
> 
> You are naive.  DOS only *thinks* it knows what size the screen is.  In
> reality, if you set the screen size without using MODE, DOS won't know a
> damned thing about it.  How about using "MODE ,50" and having a program set
> the screen back to 25 line mode.  What will DOS do?  Heh, heh ...

I use "MODE ,50" quite a lot and many programs change the screen back to
80*25. But still DOS has no problems of knowing what is the screen size.

Have you ever used DOS 4.01?

-- 
E-Mail: teittinen@finuh.bitnet               ! "Studying is the only way
        teittinen@cc.helsinki.fi             !  to do nothing without
Marko Teittinen, student of computer science !  anyone blaming you" -me