Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!ginosko!cg-atla!fredex
From: fredex@cg-atla.UUCP (Fred Smith)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: undocumented DOS call for switch character
Message-ID: <7687@cg-atla.UUCP>
Date: 25 Sep 89 12:42:35 GMT
References: <933@sl10c.concurrent.co.uk>
Reply-To: fredex@cg-atla.UUCP (Fred Smith)
Organization: Agfa Compugraphic Division
Lines: 31

In article <933@sl10c.concurrent.co.uk> asc@concurrent.co.uk (Andy Chittenden) writes:
>Does anybody know what the undocumented DOS calls are to set and get
>the switch character?
>
>Thanks in anticipation, Andy






Andy et al:

here is an excerpt from Ralf's interrupt list, inter489 on the
subject of your request:

---------------------------------------------^M
INT 21 - DOS 2+ internal - GET SWITCHAR^M
        AX = 3700h^M
Return: AL = FFh unsupported subfunction^M
        DL = current switch character^M
---------------------------------------------^M
INT 21 - DOS 2+ internal - SET SWITCHAR^M
        AX = 3701h^M
        DL = new switch character^M
Return: AL = FFh unsupported subfunction^M
---------------------------------------------^M

Hope this helps!

Fred