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From: fisher@sc2a.unige.ch (Markus Fischer)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Switching between screen modes
Message-ID: <223@sc2a.unige.ch>
Date: 14 Aug 90 10:34:45 GMT
References: <482@demott.COM>
Followup-To: alt.msdos.programmer
Organization: University of Geneva, Switzerland
Lines: 39

In article <482@demott.COM>, kdq@demott.COM (Kevin D. Quitt) writes:
>     I am using MSC 6.0, and need to reliably switch between several screen
> modes:  80x25 text, 80x43 text, 40x25 text, and (640x350) graphics mode.
> Getting to 43 line mode is no problem, but getting back out of it is - MSC's
> library dos not accomplish this properly.
> 
>     Does someone have working code that can reliably switch (for example)
> from 80x43 text to 40x25 mode?
> 
> -- 
>  _
> Kevin D. Quitt         demott!kdq   kdq@demott.com
> DeMott Electronics Co. 14707 Keswick St.   Van Nuys, CA 91405-1266
> VOICE (818) 988-4975   FAX (818) 997-1190  MODEM (818) 997-4496 PEP last
> 
>                 96.37% of all statistics are made up.

I'm no assembler wizard, but if you are, you could take a look at nnansi.zoo
(at SIMTEL20, for example).  If nnansi.sys (as a replacement of ansi.sys)
works in your configuration, then you could implement the routines in an
*.asm external, or maybe even translate them to c ?  (By the way, you can, of
course, use nnansi as-is (i.e. load the driver), and use the provided escapes
sequences, but I guess you need something more portable...)

The package includes source files, and is copyrighted:
      (C) 1986 Daniel Kegel, Pasadena, CA
      [later] Modified Tom Almy
but it can be distributed for educational use.  I guess we're allowed to
learn something from it!

I hope somebody posts a more direct solution...

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