Comment by weinzierl

I remember that one assembler claimed to do something similar to sort of watermark the binaries. From what I remember it did it only in the otherwise fully functional unregistered version to encourage people to pay for it. From my memory it was NASM but I cannot find anything about it ever being paid for. Does anyone remember a shareware assembler from mid nineties that did this?

EDIT: Another comment already mentioned A86. Probably that was the one.