Messages in this thread | | | Date | Tue, 7 Mar 2000 01:09:27 +0000 (GMT) | From | Riley Williams <> | Subject | Re: [OT] fpu IRQ x86-ism |
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Hi Peter.
>> Sorry for this somewhat OT question - I'll try to be brief. >> I have always noticed that on x86 Linux boxes, IRQ 13 is >> for the FPU and is always "1" (I assume this is from >> probing or testing at bootup). This value never seems to >> change, so again I will assume that it is only used to >> signal FPU errors. There is no "fpu IRQ" on my Alpha, >> obviously it has an FPU as well. Is it's existance on the >> PC just some lame legacy issue?
> Yup. It isn't even used to signal FPU errors on 486+ PCs.
Does that mean it's available for use by other hardware, or is that prohibited by other considerations?
Best wishes from Riley.
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