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Date: Thu, 8 Jun 1995 10:27:41 -0700 (PDT)
From: John Utz <spaz@u.washington.edu>
To: Bruce Evans <bde@zeta.org.au>
Cc: davidg@FreeBSD.ORG, hackers@FreeBSD.ORG, jkh@FreeBSD.ORG, phk@ref.tfs.com,
        uhclem%nemesis@fw.ast.com
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ACK!

On Thu, 8 Jun 1995, Bruce Evans wrote:

> >Umm, you guys don't use INT 10 to display those messages do you?
> >INT 10 tinkers with a lot of things, including A20 line.
> 
> No.  That makes the BIOS-preservation bug more surprising.  The
> screen is written to directly but the BIOS row and column variables
> are used instead of private variables!
> 
> Does INT 10 really tinker with a lot of things if you just write
> a character [and attribute]?
> 

	I thought we didin't own an INT 10, that is a bios call !! I 
assume i must be looking at this out of context somehow.. ;-(

	But since we are on the subject of int calls, how does one do it 
from freebsd anyway? I got some mail from the guy who ported this linux 
mpu401 driver ( to the sunos flavor that runs on a 386 sun ) that i 
wanted to hack on. He gave me a suprisingly helpful collection of boxes 
that i needed check off before i could do something like this. The only 
one left to sort out is how to do interrupts.

	I tried :

	grep int /usr/src/sys/i386/isa | more 

	but all i found was printfs and variable declarations :-)
( *lots* of printfs and variable declarations ) 

	Finally, what is the flag to gcc that gets it to emit the *.s 
file ? I thought it was :

		gcc -s foo.c 

but that does not seem to doing it!

> Bruce
> 

thanks gang!

*******************************************************************************
 John Utz	spaz@stein.u.washington.edu
	idiocy is the impulse function in the convolution of life