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Re: How is the IIgs beep generated?

mdj wrote:

On Dec 3, 11:07 am, "Michael J. Mahon" <mjma...@aol.com> wrote:


Michael J. Mahon wrote:


Mitchell Spector wrote:



   Here's a question, one I've been curious about the past twenty years:
Can you reproduce the IIgs "beep" on a stock Apple IIe?



It can be played using DAC522, but with 5-bit rather than 8-bit
precision, so it will be a little "rougher".  Still, it would be
a nice hack.  ;-)


Can someone point me to the "bong" sound in the IIgs ROM?

I'll extract it and try it out on SOUND.EDITOR.



Isn't the pitch and duration set by control panel parameters? It'd be
easy enough to hack the gs routine into a IIe ROM (if you don't
already use the self-test for other interesting things), but setting
the parameters is much harder.


That shows you how little I use the IIgs!  ;-)

But since it's done by toggling the speaker, with a processor speed
of 1MHz, it can certainly be generated on any Apple II.

-michael

NadaNet and AppleCrate II: parallel computing for Apple II computers!
Home page: http://home.comcast.net/~mjmahon

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