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Date: Fri, 6 Oct 2006 05:11:22 +0800
From: Eugene Grosbein <eugen@kuzbass.ru>
To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
Message-ID: <20061005211121.GA95111@svzserv.kemerovo.su>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>,
	Robert Watson <rwatson@freebsd.org>, bug-followup@freebsd.org
Subject: Re: kern/103841: [fdc] fdc(4) does not work (regression)
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On Fri, Oct 06, 2006 at 12:00:15AM +0300, Dmitry Pryanishnikov wrote:

>   The problem is clearly an I/O port resource misdetection:
> On Fri, 6 Oct 2006, Eugene Grosbein wrote:
> >>4.11-STABLE:
> >>fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
> ---------------------------------------^^^^^^^^^^^^^^^^^
>  OK.
> >>6.2-PRERELEASE:
> >>fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f0 irq 6 drq 2 on 
> >>acpi0
> ----------------------------------------^^^^^^^^^^^^^^^^^
>  Bad (no 0x3f7, 0x3f0 gets listed twice).

Recent revisions of fdc(4) do not use control register at port 0x3f7.

CURRENT's version works fine and still probes controller this way,
without 0x3f7. You can get background info from commint logs for fdc.c

Eugene Grosbein