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Date: Mon, 23 Dec 1996 18:37:29 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199612230737.SAA14138@godzilla.zeta.org.au>
To: cvs-all@freefall.freebsd.org, CVS-committers@freefall.freebsd.org,
        cvs-sys@freefall.freebsd.org, joerg@freefall.freebsd.org
Subject: Re: cvs commit:  src/sys/i386/boot/biosboot bios.S
Sender: owner-cvs-sys@FreeBSD.ORG
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>  Branch:      sys/i386/boot/biosboot  RELENG_2_2
>  Modified:    sys/i386/boot/biosboot  bios.S
>  Log:
>  YAMFC:
>  Initialize the upper 16 bits of the memory sizes properly (to 0).

I carefully decided not to commit that since it is cosmetic and
can't help.  The bits are were always actually initialized by:

	pushl	$0				# or $1
	...
	movl	this value from stack,%ebx
	...					# do stuff not changing %ebx
	...					# get size in %ax
	movl	%eax,%ebx			# sic, actually movl %ax,bx
						# this preserves %ax and
						# sets the top bits to 0
	...					# do stuff not changing %ebx
	movl	%ebx,%eax			# return this

Bruce