Posted By
Bionic
on 2004-05-15
05:00:24
|  Re: XAA!
Csabo, since you know hungarian, this page may be of help to you:
http://impulzus.sch.bme.hu/6502/
They reverse engineered the entire 6502 from microscopic images of the die. All instruction decoding is performed by a big logic array, which is described (Utasításdekódoló ?) and depicted in the circuit diagram. It should be possible to find out, which functions are triggered by XAA.
Sorry, I do not know hungarian 
Somebody should translate that page, its really a gem hidden from the world..
P.s. you can be pretty sure that 6502, 6507,6510,7510,8510 behave identical in respect to illegal opcodes.
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