Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!gwyn From: gwyn@brl-tgr.ARPA (Doug Gwyn) Newsgroups: net.micro.apple Subject: Re: 65C02 Conversion? Message-ID: <5402@brl-tgr.ARPA> Date: Fri, 19-Oct-84 18:41:14 EDT Article-I.D.: brl-tgr.5402 Posted: Fri Oct 19 18:41:14 1984 Date-Received: Sat, 20-Oct-84 07:36:52 EDT References: <4500005@uok.UUCP> Organization: Ballistic Research Lab Lines: 12 > I recently heard that the 65C02 was pin compatible with the 6502, and > that anyone with an Apple II,II+,or IIe can simply remove the 6502 from their > machine and replace it with the 65C02 and be able to use the new commands and > addressing modes. Has anyone ever tried this? Will it work? Except for some really gross dependencies on misfeatures of the old 6502, existing code should work just fine using the 65C02. I did this switch on my Apple //e a long time ago and have had no problems with it. However, unless you are going to use the new instructions there is very little reason to switch. If you DO use the new instructions then your code will not port to any machine except the Apple //c.