Re: Troubleshooting on an Apple II

["Michael J. Mahon" <mjmahon@aol.com>]

Sean Fahey wrote:
> "Ed Eastman" <noone@nowhere.net> wrote in message
> news:dhgnrh$hra$1@unlnews.unl.edu...
>
>
> > I remember distinctly that my II+ had an LED in parallel with the
> > speaker.  I guess all IIs are starting to look alike to me these days.
> > I'll go back to lurking.
>
>
> Maybe it was a mod.

And a curious one at that, since it would only light if the speaker
were disconnected.

The AppleCrate used //e boards, and the power LEDs are all visible,
as well as the rear-facing speaker LEDs.  Since the eight boards do
not have speakers connected, the speaker LEDs are handy as signals,
since they can be lit just by PEEKing the speaker toggle repeatedly.

I use them as "awaiting boot" signals, and in several parallel
programs, as "idle" indicators.

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

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