More CPLD explorations

From: Jim Brain <>
Date: Mon, 24 Feb 2014 21:51:43 -0600
Message-ID: <>
This time, it's PLA replacements.

After fitting, the C64 PLA equations take only a nominal portion of the 
xc9536(xl) space I stuffed them into.  And, none of the 36 registers are 

I know SuperPLA put a bunch of equations in the unit, for different 
products, but I was wondering...

Are there any memory mappings that would have been nice to have via the 
PLA, but are not available?  (external KERNAL at $e000, for instance?)
Yes, I understand compatibility and all that.  But, if you had a 
switchable PLA, what new modes would be of interest? (are there any?)


Jim Brain

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Received on 2014-02-25 04:00:02

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