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Asdcsvax.368 fa.unix-wizards utzoo!decvax!ucbvax!ucsfcgl!sdcarl!sdcatta!sdcsvax!wallen Tue Sep 1 10:34:50 1981 11/23 CPU problems I've been helping some people bring up Unix on a couple of 11/23 systems (the "50 patches" V6 version). They have had some hard failures of 11/23 CPUs. For instance, on a configuration which runs both RT-11 and diagnostics, booting up Unix causes the system to hang. The run light goes out, but the system does not go into ODT. The solution was to swap in a new 11/23 CPU; then everything was okay.

This has happened several times. They send the CPU back, who sends them a new one. Sometimes the replacement works, sometimes it doesn't. Has this happened to anyone else?

Mark Wallen (wallen@nprdc or ucbvax!sdcsvax!wallen)

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