Messages in this thread | | | From | (Måns Rullgård) | Subject | Re: PROBLEM: floppy motor spins when floppy module not installed | Date | Fri, 12 Dec 2003 16:33:57 +0100 |
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"Richard B. Johnson" <root@chaos.analogic.com> writes:
> On Fri, 12 Dec 2003, [iso-8859-1] Måns Rullgård wrote: > >> "Richard B. Johnson" <root@chaos.analogic.com> writes: >> >> > It is not a broken BIOS! The BIOS timer that ticks 18.206 times >> > per second has an ISR that, in addition to keeping time, turns >> > OFF the FDC motor after two seconds of inactivity.
IMHO a ridiculous design, as is most of the PC.
>> > This ISR is taken away by Linux. Therefore Linux must turn off >> > that motor! It is a Linux bug, not a BIOS bug. Linux took control >> > away from the BIOS during boot. >> >> OK, but why doesn't it affect all machines? >> > If you leave the FDC software in the kernel, the FDC software > sets up everything and turns off the motor. If you have the > FDC as a module, you have nothing in there to turn off the > motor until you install the module.
I'm running 2.6.0-test11 on a machine with modular floppy driver, without any spinning motors. I think it boots from floppy before HD, but I'm not certain (can't check right now).
-- Måns Rullgård mru@kth.se
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