Date: Mon, 23 Dec 1996 18:37:29 +1100 From: Bruce Evans <bde@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 Message-ID: <199612230737.SAA14138@godzilla.zeta.org.au>
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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
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