Re: [stella] Duel Arena

Subject: Re: [stella] Duel Arena
From: Robin Harbron <robinh@xxxxxxxxxxxxxxx>
Date: Tue, 02 Sep 1997 16:39:54 -0400
Robert A. Colbert wrote:
> >>>That's right.  I suppose if you generate the waveform on the fly that even
> >>>simple sound hardware like the Apple II will suffice.
> I tried writing a "playbin" for the Apple II and didn't have a whole lot of luck, didn't stick with it for long though.

I spent an afternoon working on it for the 64.  Within the hour I had
something playing that sounded very much like a Supercharger tape,
but it didn't work :(  I'll have to struggle with it further...
sort of infuriating, since my 64 and 2600 share the same monitor... :)

My test program is a raw (-r) output from makewav on the latest
rescue file.  BTW, Bob, I've noticed a few things from the raw
The Supercharger Notes by Christopher Salomon say that the header
is a series of $AA's, while makewav puts out $55's.  I realize
this is 10101010 and 01010101, does the Supercharger care which
if it starts on a 0 or a 1?  And the Notes state that there should
be a 0 byte following the header, while Makewav puts just an
extra bit?  Is that why the last byte of the header is a $54

> I also tried writing it for the 2600 using a waveform, then setting a delay and modifying the waveform, but each time you did, the speaker clicked.  Since then I realized that there is a "speaker click" sound on the 2600, that could use the same algorithm (or similar) as that in the Apple ROM.  Never did anything about it, but if I were inclined to, that's where I'd start.

Cool.  And that's exactly how samples could be played, if memory
weren't so precious.


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  • RE: [stella] Duel Arena
    • A. - Tue, 2 Sep 1997 11:32:07 -0400 (EDT)
      • Robin Harbron - Tue, 2 Sep 1997 16:41:00 -0400 (EDT) <=
      • crackers - Wed, 3 Sep 1997 11:51:36 -0400 (EDT)
      • <Possible follow-ups>
      • A. - Wed, 3 Sep 1997 08:56:08 -0400 (EDT)
      • Eckhard Stolberg - Wed, 3 Sep 1997 14:29:29 -0400 (EDT)