Date   : Fri, 02 Sep 1994 13:51:53 BST
From   : dyates@...
Subject: Re: UNDEFINED 6502 OPCODES

Here goes my first addition to this discussion.

n.b. This doesn't come from the address used by the list - that's
at university...

lamcw@... wrote:
> for the purposes of 6502 emulation, is it really necessary to 
> investigate these so-called undefined opcodes? i find it
> difficult to believe that commercial software would dare use these.
> of course, i'm quite ready to be proven wrong.

I think you'll find that some of the bigger games like Exile and
maybe Revs do. This is why they sometimes broke on CMOS MPUs.

Of course, I could be wrong :-)

D.

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