Bil,

> Bil, the PLA equations I referred to in my last message are the logic terms
> of the 82S100 PLA in the Commodore 64.  They were first read in 1994.  The
> equation for CASRAM was simplified later.
> 
> Lol... I remember casram.  Is there a link to the equations somewhere online?

Yes, I posted it yesterday:

http://www.zimmers.net/anonftp/pub/cbm/firmware/computers/c64/

The simplest equations (by Dave Dahle, last year) are here:

http://www.zimmers.net/anonftp/pub/cbm/firmware/computers/c64/c64pla.txt

I haven't verified those, but it shouldn't be hard to replace the
equations in one of the C programs that I wrote, available from the
same directory, and verify that the generated "truth table" binary dump
does not change.

	Marko

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