history question

Ivan Tomek ivan.tomek at acadiau.ca
Fri Feb 21 18:18:14 UTC 2003


I have recently read a paper that said that the IBM/360 (I think) team used
the 'illegal opcode' trap to emulate unimplemented instructions. This sounds
very much like like using doesNotUnderstand: in Smalltalk. Is there any
historical connection between the two?


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