Date: Fri, 15 Apr 2005 04:06:11 GMT From: "bkoenig@cs.tu-berlin.de" <bkoenig@cs.tu-berlin.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/79944: virtual floppy controller of Virtual PC does not work Message-ID: <200504150406.j3F46Bgf076612@www.freebsd.org> Resent-Message-ID: <200504150410.j3F4APW5090877@freefall.freebsd.org>
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>Number: 79944 >Category: kern >Synopsis: virtual floppy controller of Virtual PC does not work >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Apr 15 04:10:24 GMT 2005 >Closed-Date: >Last-Modified: >Originator: bkoenig@cs.tu-berlin.de >Release: >Organization: >Environment: affects all kernels since Sat Sep 18 04:57:55 2004 UTC (phk's new floppy driver) >Description: The virtual floppy disk controller of Microsoft Virtual PC 2004 does not work. This is not a FreeBSD bug, because the virtual controller simply does not react on attempted resets. Therefore it might be a bug of Virtual PC 2004. >How-To-Repeat: Run FreeBSD 5.3-RELEASE or later with Virtual PC and try to use a floppy disk image as usual. /dev/fd0 is missing. dmesg.boot shows failure with fdc. >Fix: This is not intended as a fix but rather as a hint for users who just want a working fdc. There is an assertion in fdc_initial_reset in src/sys/dev/fdc/fdc.c which is true: /* * Assert a reset to the floppy controller and check that the status * register goes to zero. */ fdout_wr(fdc, 0); fdout_wr(fdc, 0); if (fdsts_rd(fdc) != 0) return (ENXIO); Remove the last two of these lines and build and install a new kernel. >Release-Note: >Audit-Trail: >Unformatted:
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