On Jun 4, 2012, at 12:04 PM, Brian Hechinger wrote: Sadly the updates didn't fix it for me. :( VAX simulator V3.9-0 /simh/rifter/vax.ini> set cpu idle Command not allowed -brian That's odd. I just downloaded and built simh 3.9.0, and it accepts the command without any complaints, both in "vax" and "vax780": pkoning:simhv39-0 pkoning$ BIN/vax780 VAX780 simulator V3.9-0 sim> set cpu idle sim> show cpu idle idle=VMS, idle enabled, stability wait = 20s sim> set cpu idle=NETBSD sim> show cpu idle idle=NETBSD, idle enabled, stability wait = 20s sim> q Goodbye pkoning:simhv39-0 pkoning$ BIN/vax VAX simulator V3.9-0 sim> show cpu idle idle disabled sim> set cpu idle sim> show cpu idle idle=VMS, idle enabled, stability wait = 20s sim> set cpu idle=OPENBSD sim> show cpu idle idle=OPENBSD, idle enabled, stability wait = 20s sim> q Goodbye pkoning:simhv39-0 pkoning$ paul