Altair32 Emulator "Easter Egg" idea

[Bill Sudbrink]

Vintage Computer Festival wrote:
>
> On Fri, 4 Mar 2005, Jim Battle wrote:
>
> > One other thing I have done is to emulate the music card -- just a
> > single pole RC lowpass filter hooked up to the S-100 INT* line.  The
> > "MUSIC" program would take a score and compile it into a program to
> > toggle the INT line to produce polyphonic music -- although the notes
> > aren't very well tempered as they get higher in frequency.  It is pretty
> > impressive that it works as well as it does:
> >
> > http://www.thebattles.net/sol20/d-minor.mp3
> >
> > I recently upgraded PC's and now my own emulator doesn't run right and
> > the sound comes out only when I'm using the debugger.  I guess it is
> > about to time spin a revision on the emulator.
>
> Very cool!  Did you record this from the emulator or from an actual
> Sol-20?  It sounds as good as what the Apple ][ could produce, which I
> suppose makes sense since it's generating sound using the same principal.
>
> How do I load and play the sound files?
>

The whole thing, along with a PDF of the manual is on his Sol software
page:

http://www.thebattles.net/sol20/solpgms.html

The manual includes the (very simple) schematic for the "interface".
Now that I know that a VCF judge has pronounced it "Very cool!" I think
I'll have my Sol running this at the next VCF East.  ;-)

Bill S.