[mras0]

Have an Amiga w/ 060, and that instruction doesn't seem to modify any A registers. (Only did a very quick test of those exact instruction words)

[basementcat]

I appreciate that I can ask an esoteric question about the behavior of a 30 year old microprocessor and multiple people respond with test results on actual hardware within a few hours. Can y'all also post the mask revision (if known) and whether it is an EC or LC device? (In case it impacts behavior)

[mras0]

Rev5 "full" 060 (not EC/LC). Quick capture of crappy methodology: https://imgur.com/a/XwQ1Tnp (PCR with revision number is in d0)

[dougg3]

My test of an 040 (no A1 change, D1 changed) was on a chip with the following markings:

XC68LC040RC25B

02E23G QEDP9348D MALAYSIA