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From: steve@thelake.mn.org (Steve Yelvington)
Newsgroups: comp.sys.atari.st
Subject: Re: Technical Q: keyclick
Message-ID: <A2666534078@thelake.mn.org>
Date: 31 May 90 00:55:32 GMT
References: <11038@sdcc6.ucsd.edu>
Organization: Otter Lake Leisure Society
Lines: 31
X-Member-Of:  STdNET

[In article <11038@sdcc6.ucsd.edu>,
     zz1jm@sdcc4.ucsd.edu (Jon McCarty) writes ... ]

> I've been scrounging through all my docs but I can't find any
> reference to how to inquire and change the keyclick state.  I don't
> want to replace it, just shut it off.
> 
> I'd appreciate any pointers to some bios or xbios call I missed,
> or whatever.

It's a bit in the conterm system variable in protected memory at 0x484.

Here's a fairly paranoid program that turns it off.

#include <osbind.h>
main()
	{
        long ssp;
        char conterm;
        ssp = Super(0L);            /* enter supervisor mode */
        conterm = *(char *)0x484;   /* get conterm */
        Super(ssp);                 /* back to normal */
        conterm = conterm & 0xFE;   /* nuke the keyclick bit */
        ssp = Super(0L);            /* enter supervisor mode */
        *(char *)0x484 = conterm;   /* set conterm */
        Super(ssp);                 /* back to normal again */
        }

-- 
   Steve Yelvington at the lake in Minnesota
   (Ah, summer... leech season...)