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Date:      Sat, 15 Jan 2022 13:27:01 +0000
From:      bugzilla-noreply@freebsd.org
To:        standards@FreeBSD.org
Subject:   [Bug 255072] boot (legacy): no progress beyond 'BIOS DRIVE D: is disk1'
Message-ID:  <bug-255072-99-DjPyqPoQ0S@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-255072-99@https.bugs.freebsd.org/bugzilla/>
References:  <bug-255072-99@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255072

--- Comment #29 from spell@itl.ua ---
Seems, this may be useful.

bio_buffer variable at my book has address 0x5a6b4 and PTOV(V86_IO_BUFFER)
equals to 0xffffe000.

loader's smap gives also:

SMAP type=3D01 base=3D0000000000000000 len=3D000000000009dc00
SMAP type=3D02 base=3D00000000ffb00000 len=3D0000000000500000

So bio_buffer resides in usable memory block (type=3D01) and PTOV(V86_IO_BU=
FFER)
is in reserved (type=3D02) memory block.

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