Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!attctc!chasm
From: chasm@attctc.Dallas.TX.US (Charles Marslett)
Newsgroups: comp.sys.atari.8bit
Subject: Re: 6502C vs. 65C02
Summary: 65C02 has extra instructions, 6502C has different pinout
Message-ID: <10314@attctc.Dallas.TX.US>
Date: 23 Nov 89 04:07:54 GMT
References: <115200051@uxa.cso.uiuc.edu>
Organization: The Unix(R) Connection, Dallas, Texas
Lines: 18

In article <115200051@uxa.cso.uiuc.edu>, tle33710@uxa.cso.uiuc.edu writes:
> 
> 	According to the ATARI 130XE Owner's Manual, the Processor in the
> machine is the 6502C Microprocessor, clock speed 1.79 MHz."  Is this the
> same as the 65C02, with more instructions than the 6502, as stated in the
> MAC-65 owner's manual?

Nope, the 6502C has exactly the same instruction set (with it own funny
idiosyncrasies) as the original 6502.  It does have some (one?) extra
pins defined to easily support the Antic chip -- I believe this is to
synchronize passing off control of the address bus between the two chips.

On the old 800 (which used a real 6502), the function was handled by some
discrete gates and buffers -- so you could swap out the 6502 with a 65C02.
No work with the 130XE (fie!)

Charles Marslett
chasm@attctc.dallas.tx.us