Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: [OT] fpu IRQ x86-ism | Date | 6 Mar 2000 12:08:23 -0800 |
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Followup to: <Pine.LNX.4.10.10003061109520.12766-100000@neptune.terran> By author: "B. James Phillippe" <bryan@terran.org> In newsgroup: linux.dev.kernel > > Greetings, > > 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.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot."
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