Date: Fri, 8 Nov 2002 02:07:41 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: hackers@freebsd.org Subject: Int 0x15 and VM86 question Message-ID: <200211081007.gA8A7fwx000751@apollo.backplane.com>
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I've been pulling my hair out all night trying to figure out how
the hell the VM86 code is able to issue an int 0x15 to the BIOS.
I can't find where it gets the interrupt descriptor table entry
for int 0x15. My assumption is that it copies it from the idt
supplied by the BIOS but I don't see where. As far as I can tell
FreeBSD loads a pristine IDT that does not have a record for
int 0x15. So how can the VM86 code issue an int 0x15 and have it
find the BIOS?
If anyone knows the answer to this, I'm all ears!
-Matt
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