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Date: Mon, 11 Mar 96 22:30:10 +0100
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From: Jean-Marc Zucconi <jmz@cabri.obs-besancon.fr>
To: bde@zeta.org.au
Cc: current@freebsd.org
In-Reply-To: <199603110647.RAA07820@godzilla.zeta.org.au> (message from Bruce
	Evans on Mon, 11 Mar 1996 17:47:26 +1100)
Subject: Re: COMCONSOLE: a patch and a problem
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>>>>> Bruce Evans writes:

 >> I played with the boot blocks and I noticed that I was unable to boot
 >> from a serial console (keyboard unplugged). The patch below fixes a
 >> bug in boot.c/probe_keyboard.c (well, at least on my machine:-).

 > I don't think I broke this :-).  I wonder when it last worked.

 >> The problem now: when booting from a serial console, there is no
 >> timeout at the 'Boot:' prompt. Further investigations showed that the
 >> bios_tick function always returns the same value! Is this related to
 >> the fact that the keyboard is not plugged in? 

 > I broke this.  It's because there are no BIOS calls which have the
 > side affect of allowing clock interrupts.  Add some dummy BIOS calls.
 > Putting them in the bios_tick macro would take too much space, so
 > arrange to always call ischar() and throw away the result in the
 > RB_SERIAL case.

Thanks for the hint. I just tried it and comconsole now works
perfectly. (serial_ischar() -> serial_ischar()|(0 & ischar ()))

 > Bruce

Jean-Marc
 _____________________________________________________________________________
 Jean-Marc Zucconi       Observatoire de Besancon       F 25010 Besancon cedex
                   PGP Key: finger jmz@cabri.obs-besancon.fr
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