Date   : Tue, 09 Jan 1996 14:33:54 GMT0BST
From   : "Tom Seddon" <T.W.Seddon@...>
Subject: Illegal opcodes

(I meant to put this in my e-mail yesterday but I forgot.)

At home I have an old Acorn User (I can't remember which issue) which 
has a listing of all the 6502 illegal opcodes. Apparently they are 
valid for 6502s marked 'SY6502A', and there is a small test program 
to test if your 6502 implements the more useful ones. The 
descriptions are also more helpful than 6502.txt (instead of LAX this 
listing gives LDA-LDX for example) although it isn't as complete. 
There are also no cycle timings, although these would be easy enough 
to find out.

Is anyone interested? If people are I'll scan it in as a bitmap (the 
page is black on yellow so it should come out OK) next time I'm at 
home (end of January I should think) and e-mail it to people.

--Tom
     .                 ** Tom Seddon **                 .
    / \          E-mail: T.W.Seddon@...          / \
   /(o)\                                              /(o)\
  /=====\        Call out GANDHU and be happy        /=====\
 /       \                                          /       \
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^