> Does *anybody* build a fault-tolerant Intel machine? Mass produced or custom? There certainly are custom systems that incorporate Intel engines. I doubt any of them are mass produced items -- there just isn't the demand to justify the extra cost of multiple instruction pipelines and the additional complexity in writing compilers to cope with such a beast.
> *Has* anyone > built such a beastie? Masscomp. Intel Research Hypercube. Sequent Balance. Not exactly household names, but they do exist. > Convergent used MC68K processors and their > assemblers had a > problem with the ABCD instruction... and they built the 7300/3B1 for > AT&T.) 3B1s. Bleah... that explains a LOT. 8-) > In an Intel-based SMP box I don't think there's any way to tell the OS > "this CPU is cooked, don't schedule for it and make sure it's halted". Depends on the processor interconnect. The Sequent boxes definitely did this. > I doubt anyone's tried to implement a "Tandem-ish" machine w/ > Intels... Well, Tandem did a small experiment run, but never put it into full production due to compatibility and pricing complaints. That was in the 80186 days, though. I don't think they ever tried again. -- db ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
