> From: Jerry Weiss > Typically execution of the RESET instruction in a user program is > treated as a NOP Yeah, that's not documented in most PDP-11 CPU manuals, either. It's one of the things that makes the PDP-11 impossible to virtualize; only HALT and SPL trap, IIRC. M[TF]P[ID] doesn't, I think, and neither does WAIT or RT[IT], IIRC. Noel