Re: Kernels 2.1 with 386DX/387 IRQ13 PC boxes

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 28 Oct 1997 22:29:22 +0000 (GMT)

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> I have a problem with kernels since at least 2.1.46 and up to 2.1.59
> with my 386DX33 (AMD compatible) and my 387 Cyrix FasMath CX83D87-33 GP
> math coprocessor. I think the problem appears also with a standart Intel
> 80386/80387 when IRQ13 is used.

Turn off the SMP=1 in the top Makefile

> Then, the kernel will boot ONLY if SMP is NOT defined at compile time.

Correct - IRQ 13 does something totally different in SMP mode. (BTW if
someone is crazy enough to want to work on this some IBM dual 486 boards
have 486SLC + FPU delivering a local IRQ 13 to each CPU) - we dont support
that either

Alan

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