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    SubjectRe: Kernel for P-II on P-I.
    Date
    On Thu, 6 Jul 2000 10:34:47 +0200 (MEST), 
    R.E.Wolff@BitWizard.nl (Rogier Wolff) wrote:
    >A kernel compiled for P-II (or something like that) crashes without
    >saying a thing on P-I. would it be an idea to print a message?
    >("This kernel is incompatible with this processor")

    AFAIK that is caused by gcc using instructions that exist on P-II but
    not P-I, including instructions like conditional move (CMOVE).
    Unfortunately those instructions are used everywhere, including in
    printk. No way to get a message out without detecting the problem in
    the real mode boot loader and using BIOS I/O.


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