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