Path: utzoo!utdoe!generic!pnet91!sb
From: sb@pnet91.cts.com (Stephen Brown)
Newsgroups: comp.sys.apple2
Subject: Re: Apple ][ beep parameters
Message-ID: <536@generic.UUCP>
Date: 23 Feb 91 05:15:06 GMT
Sender: root@generic.UUCP
Organization: People-Net [pnet91], Etobicoke, ON
Lines: 22

toddpw@nntp-server.caltech.edu (Todd P. Whitesel) writes:
>knauer@cs.uiuc.edu (Rob Knauerhase) writes:
>
>>Who out there remembers the parameters (preferably frequency and duration)
>>of the original Apple ][+ or //e beep?
>
>Apple // Reference Manual, page 31:
>
>"The tone has a frequency of 100Hz and lasts for 1/10th of a second."

I too, thought it was 1000 hz for .1 seconds. I checked my Apple Reference,
and indeed it says what you say. If you check page 163, however:

FBE4: BELL2.... Toggle speaker at 1 Khz for .1 seconds.
Bell2, loads A with $C (12) and then executes a delay (through WAIT) of
roughly 535 microseconds or 0.5 mS, hits the speaker, and then goes back for
more Y ($C0 or 192) times. The result is a tone that lasts roughly .103
seconds and is closer to 2 Khz. Have I forgotten something?


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