Path: utzoo!utgpu!watmath!isishq!f171.n221.z1.FIDONET.ORG!izot
From: izot@f171.n221.z1.FIDONET.ORG (Geoffrey Welsh)
Newsgroups: comp.sys.cbm
Subject: Re: what is this chip(65C802)
Message-ID: <2014.2440278B@isishq.FIDONET.ORG>
Date: 8 Apr 89 13:46:55 GMT
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 > From: mac@harris.cis.ksu.edu (Myron A. Calhoun)
 > Message-ID: <1581@deimos.cis.ksu.edu>
 
 > >about the only difference between a 6502 and a 6510 is the 6-bit (I think
 > >it's 6) parallel port on-chip?  Not a high-tech feature that significantly
 >
 >   True.  The instruction set was essentially (and maybe exactly) the same.
 
   To the point where undocumented op codes that worked on the 6502 
(regardless of the manufacturer!) work on the 6510 (and probably the 8502 as 
well).
 
   The 65C02 and the 65816, on the other hand, have reassigned those op codes 
to new instructions, so programs that depend on undocumented op codes 
(PaperClip) don't work on these CPUs.
 


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