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Date:      Wed, 30 Sep 1998 18:53:20 -0700
From:      Mike Smith <mike@smith.net.au>
To:        Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
Cc:        current@FreeBSD.ORG
Subject:   Re: VM86 and APM 
Message-ID:  <199810010153.SAA04986@dingo.cdrom.com>
In-Reply-To: Your message of "Mon, 28 Sep 1998 17:18:04 %2B0900." <199809280818.RAA03188@zodiac.mech.utsunomiya-u.ac.jp> 

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> 
> I printed the error code (ax register) from the APM BIOS call via VM86
> during apm_probe(), I got:
> 
> apm: BIOS probe failed: error 0x1  carry 1  ax 0x8600 bx 0x0
> apm0 not found
> 
> 0x86 means "No APM BIOS", right?

Yes.  It may mean that it's disabled in the BIOS setup, or that the APM 
BIOS doesn't support being connected to from VM86 mode.  I haven't 
heard any confirmation that this might be common.

> Then I loaded a kernel without VM86 and it said:
> 
> apm0 not found
> 
> Oh, I thought it worked before!  It must have been my dream that the
> apm driver had worked on this MB...

That would explain a lot.  8)

> The motherboard has the Award BIOS, which does have power management
> setup items, such as "Power Management" and "PM Control by APM" (I
> natually have them both enabled).
>
> May be the APM BIOS is deficient?

Possibly, but you wouldn't expect so.  Try booting the non-VM86 kernel 
from a cold power-on, and see if the probe still fails.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com



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