Messages in this thread | | | Date | Mon, 19 May 2003 14:08:20 +0100 | From | Dave Jones <> | Subject | Re: int 0x15, ah=0x88 question |
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On Mon, May 19, 2003 at 12:22:07PM +0200, S-n-e-a-k-e-r@gmx.net wrote: > > 387 movb $0x88, %ah > 388 int $0x15 > 389 movw %ax, (2) > > Why memory address 2 is used? Where else in the kernel is it used? We are in > real mode, so (2) should be the same as %ds:(2), or not?
This code is building the entries in the zero page for use later.
> Sorry that I'm bugging the mailing list with that question but I didn't > found the answer anywhere. So a web page, a book or something else would be also > nice as an answer.
See Documentation/i386/zero-page.txt
Dave
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