Re: [stella] Pokey Mod For A 2600

Subject: Re: [stella] Pokey Mod For A 2600
From: Eckhard Stolberg <Eckhard_Stolberg@xxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 18 Oct 1997 16:15:05 +0200
>Anyone got any information on how exactly activision implimented the
>pokey chip in the Pitfall][ cart?

AKAIK Pitfall II does not use the pokey chip. It uses volume samples.
The chip inside the cart just takes a value out of it's sample ROM at
a given rate and masks it into the same normal ROM address everytime.
That way the program can read the value from there and put it into the
TIA's volume register without wasting too much time of the scanline by
calculating which sample value to read next.

Ciao, Eckhard Stolberg

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