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From: forsyth@plan9.cs.york.ac.uk forsyth@plan9.cs.york.ac.uk
Subject: locked keyboard
Date: Tue, 21 Nov 1995 09:09:05 -0500	[thread overview]
Message-ID: <19951121140905.47ILh1DcT8YfEsNDDuAq4uO0bVBVxVJ2JZVxHR1L8rw@z> (raw)

i've checked the IBM PC/AT handbook.
on a machine with a keyboard controller
compatible with that specification,
both bits 5 and 6, not just bit 6, change
the keyboard's handling of scan codes.
the other option looks like a PC/XT compatibility mode to me.

perhaps the mouse enable/disable appeared in the PS/2
where they'd done away with PC/XT compatibility?
i suppose there must be a bit somewhere to tell
the difference, but we haven't got a PS/2 handbook here.

oh god i hate this stuff.






             reply	other threads:[~1995-11-21 14:09 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1995-11-21 14:09 forsyth [this message]
  -- strict thread matches above, loose matches on Subject: below --
1995-11-21 13:46 forsyth
1995-11-21  8:08 Dave

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