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Re: Enhanced //e with a 6503??!

Subject: Re: Enhanced //e with a 6503??!
From: Eric Smith <eric@brouhaha.com>
Date: 21 Apr 2006 21:26:08 -0700
Newsgroups: comp.sys.apple2
Organization: Eric Conspiracy Secret Labs
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heuser.marcus@freenet.de writes:
> In one usenet post I read that this is simply another name for the
> 65C02 made by Rockwell but I don't know if this is correct as there is
> another, not totally 65C02-compatible chip: The 65SC02 from GTE, which
> does not have the BBR, BBS, RMB, SMB instructions of the 65C02.

Actually it's the other way around.  The Rockwell parts (and possibly
some others) have the BBR etc. instructions above and beyond what is
standard on a 65C02.  Rockwell added these instructions on their earlier
NMOS microcontrollers (e.g., "R6500/1"), so they added them to their
version of the 65C02 as well.

References:
- Enhanced //e with a 6503??!
  - From: "BLuRry" <brendan.robert@gmail.com>
- Re: Enhanced //e with a 6503??!
  - From: heuser.marcus@freenet.de

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