> >let me understand.. it seems that it can do more than generate sound for
> >the background soundtrack. Where the other features actually used in
> >Pitfall II?
>
> Pitfall II reads all of its graphics data from the extra ROM only.
> and I think it uses all the different reading methods for this.
The nibble swaps, byte reversals and shifts are not used.
> Also the random number genarators are used in the game. Since
> Pitfall II doesn't have any swinging vines anymore, I don't think
> that the register, that creates data for drawing lines, is used.
This is right.
John
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