Re: Asteroids hack

Pokeys shall be available as long as the BallBusters (?) cartridge holds
out. I understand there are about 40,000 of them left @ $1-$2US here and
there...

John :-#)#

At 05:02 PM 5/8/2001 -0700, you wrote:
> > >Except there'll be many missing Deluxe sounds, and the Asteroids sounds
> > >can be approxmiated with the pokey that's on the Deluxe.
> > Nah... POKEY added to the daughtercard and muxed into the Asteroids audio
> > output summing circuit. (Much easier to add a POKEY than the analog sound
> > hardware. Well, for me at least!)
>
>The only difference is the "bump" and shot sound. They can both be
>duplicated with the Pokey. I'm just worried about the availability of the
>Pokeys. Besides, now that you have the source to all three games, you have
>no excuse. ;-)
>
> > Still though, a combination technique would probably work for all
> > platforms-- some software patches to the DLX and LL code runs quite
> > comfortably on Asteroids hardware, and adding the POKEY gets you the DLX
> > sounds. For LL, the Pokey could recreate the varying thrust volumes...
>
>The Pokey has an onboard filter that could be used in this fashion.
>
> > > > I didn't want to try to recreate the analog sounds in hardware, and I
> > > > want to hack the Asteroids Deluxe sound routines into LL or AST, so I
> > > > the Asteroids board. (I figure that the Asteroids thrust sound
> will be
> > > > in LL)
> > >Avoiding making software changes and doing it in hardware, eh? ;-)
> > Not as much as I've always really liked the smoothness of the Asteroids
> > "thrust" sound and I've never known a POKEY to get that same quality.
>
>The Deluxe thrust sound is in hardware and is the same circuit as
>Asteroids - it's not generated by the Pokey.
>
> > >Apparently the 65C02 has higher clock rate versions, too. I'm just looking
> > >for a source for them.
> > I don't think you'll find much anymore, but a few things to try:
> > 1) WDC (but I don't think they sell chips anymore though)
>
>They do, actually. I've just been informed that they have 14Mhz DIP 40
>parts, but they require a minimum order of $100. The chips are $3.25 each.
>
>-->Neil
>
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>Neil Bradley C++ - A language where you can make your
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Received on Tue May 8 23:34:36 2001