Date: Wed, 13 Mar 1996 13:52:58 +1100 From: Bruce Evans <bde@zeta.org.au> To: freebsd-current@freebsd.org, j@uriah.heep.sax.de Subject: Re: COMCONSOLE: a patch and a problem Message-ID: <199603130252.NAA22009@godzilla.zeta.org.au>
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>> I'll also take a look at syscons and see why it should
>> be different.
>syscons uses a different tty structure for the console than for VT1.
0
>Most people would hesitate if you always write back the boot block,
>just to store a single bit in it. Well, van Gilluwe reports bit 2 of
>the so-called ``equipment byte'' in the CMOS (offset 0x14) as
>`unused'. Perhaps we could use it to store the serial console flag
>there? :)
The Interrupt List says:
14h - Equipment Byte
...
Bit 3 Display ENabled ...
Bit 2 Keyboard ENabled ...
...
14h - (AMSTRAD) BYTE user RAM checksum
I have used the keyboard security lock bit. This is easy to test for
(((inb(0x64) & 0x10) == 0) means locked) but has other problems (my
Award BIOS hangs if the keyboard is locked and the BIOS "Halt on
keyboard error" is disabled; I have to disable "Halt on disk error").
Some systems don't have keyboard security locks.
Bruce
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