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From:	dpsm AT en DOT com (Dale P. Smith)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: That rings a bell!!
Date:	26 Oct 1995 18:58:50 -0400
Organization:	Exchange Network Services, Inc.
Lines:	27
References:	<DH24Gq DOT JJo AT jade DOT mv DOT net>
Nntp-Posting-Host:	en.com
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway:	from newsgroup comp.os.msdos.djgpp

In article <DH24Gq DOT JJo AT jade DOT mv DOT net>, Eli Zaretskii  <eliz AT is DOT elta DOT co DOT il> wrote:
>
>On Thu, 26 Oct 1995, A.Appleyard wrote:
>
>> > ... Int21h/AH=2 works in [Gnu] Emacs also [as a way of making a beep], but
>> > if I try Int 21h/AH=40h, either by calling write() or directly with int86()
>> > or _go32_dpmi_sinulate_int(), I [get extra characters on the screen].
>> 
>> Because AH=40h int21h "to file/device with handle BX, write CX bytes from
>> [DS:DX] etseq. AX:=nbytes actually written" likely writes via a DOS buffer.
>
>Indeed.  However, that shouldn't be a Bad Thing, because the beep is 
>indeed produced.  The problem is, it somehow disrupts the operation of 
>Int 16 BIOS functions, which screws up Emacs keyboard queue.

Use: sound(freq); delay(n); nosound();  to get beeps without screwing up
the queue.  I have NEVER had the keyboard go goofy in emacs doing this.
You can make the shorter too.

Dale


-- 
Dale P. Smith            "They don't call me 'Dale Smith' for nothin you know!"
dpsm AT en DOT com       home                                        -- Dale P. Smith
dpsm AT lubrizol DOT com work
http://www.en.com/users/dpsm/

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