[Techtoolslist] Atari 6502A NOP adapter

[martin at guddler.co.uk]

Hi all,

Just been trying to find information on what is different about the KK  
6502 (Atari) NOP adapter that makes it produce 8080 signatures as  
opposed to the normal 6502 ones and I discovered that the question has  
been posed before - not surprising I guess.

Just wandering if this mystery was ever solved and perhaps I'm not  
looking in the right places?

I'm sure I once took down signatures from a working board using my  
standard 6502 adapter but as always, when I want them, I'm damned if I  
can find them so maybe I imagined it.

In case anyone hasn't a clue what I'm talking about, see the footnote  
on page 14 of the PDF document "SigAnalNotes.pdf" that ought to be all  
over the net but I can't find a link to it just yet!

The original TechTools list message where this was asked before is  
here (with no answer):
http://www.vectorlist.org/TechTools/2002/10/0035.html

Thanks,
Martin.