Messages in this thread | | | From | nathan.zook@amd ... | Subject | RE: [OT] fpu IRQ x86-ism | Date | Mon, 6 Mar 2000 15:49:59 -0600 |
| |
> -----Original Message----- > From: hpa@transmeta.com [mailto:hpa@transmeta.com] > By author: "B. James Phillippe" <bryan@terran.org> > > > > 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
It is in comaptibility mode. Which means we have to support it.
Nathan
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |