Path: utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!uw-beaver!cornell!rochester!ritcv!mds7958
From: mds7958@ritcv.UUCP (Mark Sicignano)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Bat file using ESC seq needs to find if DEVICE=ANSI.SYS was set
Message-ID: <386@ritcv.UUCP>
Date: 13 Apr 88 19:14:28 GMT
References: <767@ms3.UUCP> <28501@linus.UUCP> <196@lafcol.UUCP>
Organization: Rochester Institute of Technology, Rochester, NY
Lines: 20

> In article <28501@linus.UUCP>, jcmorris@mitre-bedford.ARPA (Joseph C. Morris) writes:
> > In article <767@ms3.UUCP> msicv01@ms3.UUCP (Jay G. Heiser) writes:
> > >...I need a way to test before using any ESC sequences 
> > >whether or not the [ANSI.SYS] driver has been set.  How can I do that?
> > 
> Here's a fragment of C code which works for me.  It compiles under
> MS C 5.0:
> 
> union REGS inregs,outregs;
> 
> printf("\n\033[2J"); /* prints a newline and then tries to clear the screen */

I don't think this will work?  At least not on my version of MS-DOS (3.1)
Even without ansi.sys installed, the \003[2J sequence still clears my screen
and puts the cursor at HOME position.

However the escape sequence \003[H is only recognized when ansi.sys is used,
so this will work.

-mark