Messages in this thread | | | From | (Måns Rullgård) | Subject | Re: PROBLEM: floppy motor spins when floppy module not installed | Date | Fri, 12 Dec 2003 16:11:17 +0100 |
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"Richard B. Johnson" <root@chaos.analogic.com> writes:
> On Fri, 12 Dec 2003, [iso-8859-1] Måns Rullgård wrote: > >> Dale Mellor <dale@dmellor.dabsol.co.uk> writes: >> >> > 1. Floppy motor spins when floppy module not installed. >> >> It's a known problem. Some broken BIOSes don't turn off the motor >> after probing for a disk. One solution is to change the boot priority >> in the BIOS settings so the hard disk is tried before floppy. If you >> ever need to boot from a floppy, you can change it back. > > 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. 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?
-- Måns Rullgård mru@kth.se
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