On Sat, 10 Sep 2005 shoppa_classiccmp at trailing-edge.com (Tim Shoppa) wrote: You haven't worked on the 86x0 systems, I can hear... The 6000 series are a joke in comparision. The 86x0 systems are designed to continue to work even when chips actually don't work. Those faults are logged, alternate signal paths are activated, and the board should be scheduled for replacement at the next normal PM. So yes, there are double sets of registers, paths, and whatnots, so that most faults actually don't stop the machine from running. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol