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Date: Sat, 10 May 1997 00:48:46 +1000 (EST)
From: Ada T Lim <ada@not-enough.bandwidth.org>
Reply-To: ada@not-enough.bandwidth.org
To: FreeBSD-gnats-submit@FreeBSD.ORG, multimedia@FreeBSD.ORG
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Subject: kern/3564: using MPU401 driver pagefaults kernel
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>Number:         3564
>Category:       kern
>Synopsis:       using MPU401 driver pagefaults kernel
>Confidential:   yes
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri May  9 07:50:01 PDT 1997
>Last-Modified:
>Originator:     Ada T Lim
>Organization:
>Release:        FreeBSD 2.2-STABLE i386
>Environment:
Using TB Tropez in MPU401 mode.  This is a hardware emulation of the MPU401 -
requires an OS be downloaded onto the card at bootup.

>Description:
Basically, using the Tropez in MPU401 mode pagefaults the kernel.
One tries to play a midi note, and *boom*, down goes the system.

>How-To-Repeat:
Boot DOS.  Run setupsnd.exe and load oswf.mot into the soundcard.
Either c-a-del or run fbsdboot.exe.
playmidi -e <somefile.mid>
*bang* there it goes.

This method (boot dos, configure the card, then boot to OS of choice)
has worked with OS/2 and Linux in the past.

>Fix:
Workaround:  use the really crappy OPL3 on the card.
>Audit-Trail:
>Unformatted: