Roy #1 Posted March 12, 2016 Just a quick question regarding illegal opcodes. Have there ever been any cases where such opcodes work on one machine but act erratically on another? Not sure if there are different revisions of 6502s in different 7800s or not. I'm not going crazy with them so far, and have found LAX #$00 ( #$A7 #$00 ) to be handy in a few places, but I'd like a bit of peace of mind they'll work across the board. Thanks in advance! Quote Share this post Link to post Share on other sites
+RevEng #2 Posted March 13, 2016 You should be good. Several 2600 homebrews use them, including those written with batari Basic. If they were a problem on the 7800, I'm pretty sure we would have heard about it by now. 1 Quote Share this post Link to post Share on other sites
Roy #3 Posted March 13, 2016 Good to hear, thanks! Quote Share this post Link to post Share on other sites
xxl #4 Posted March 13, 2016 $A7 is stable http://xxl.atari.pl/sally-6502c/ 1 Quote Share this post Link to post Share on other sites
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