Re: Hardware emulation of 6509 using 6502?

From: silverdr_at_wfmh.org.pl
Date: Wed, 15 Nov 2017 15:15:52 +0100
Message-Id: <5DD64411-B444-471D-B85D-E064F4F21100@wfmh.org.pl>
> On 2017-11-15, at 15:11, didier derny <didier@aida.org> wrote:
> 
> I find all that strange  for me using "side effect" of a chip such as illegal opcode is a bad practice... and makes bad software...

In general - yes. Even more than self-modifying code :-)

> in Commodore software is there any use of these illegal opcode ?

Not sure, probably not. But if we talk Commodore, majority of software base comes from other, non-Commodore vendors/programmers/groups. Compatibility with those is unfortunately very important.

-- 
SD! - http://e4aws.silverdr.com/


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Received on 2017-11-15 15:02:01

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