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Date: Sat, 24 Jan 2009 14:10:24 +0200
Message-ID: <f43fc5580901240410l2bb6599h917044a8932b4eeb@mail.gmail.com>
Subject: Re: [Qemu-devel] [PATCH][Resend] Floppy: Properly handle Sense
	Interrupt Status after FDC Reset
From: Blue Swirl <blauwirbel@gmail.com>
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To: theburner1@yahoo.com, qemu-devel@nongnu.org

On 1/22/09, Justin Chevrier <theburner1@yahoo.com> wrote:
> Original text below.
>
>  Attached is a patch that changes how the emulated floppy controller repl=
ies to Sense Interrupt Status commands immediately after a controller reset=
. The specs state that after a Reset the 82078 goes into polling mode which=
 needs four Sense Interrupt Status commands to be issued afterwards to clea=
r the status of each drive. Currently we always respond to Sense Interrupt =
Status with a SEEK END instead of POLLING. This causes a problem with the S=
CO Openserver installer which is expects a POLLING state after reset. This =
patch returns a POLLING status for four Sense Interrupt Status requests imm=
ediately after a controller reset. This approach mirrors the way Bochs hand=
les this situation. With the attached patch applied Openserver gets further=
 when trying to load storage drivers from the floppy disk (blocked by anoth=
er issue, patch on its way). I have successfully tested the floppy drive on=
 the following OSs after applying this patch: Windows 98, Windows XP
>  SP2, Linux x86 (SysRescCD 1.1.3 and Ubuntu 8.10).
>
>  Justin
>
>  Changelog:
>
>  Properly handle Sense Interrupt Status after FDC Reset
>
>  Signed-off-by: Justin Chevrier <theburner1@yahoo.com>

Thanks, applied.