Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: [Q] int15h after kernel has booted | Date | 26 Sep 1999 00:19:22 GMT |
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Followup to: <19990926101136.A20325@wookie.chirp.com.au> By author: Nathan Hand <nathanh@chirp.com.au> In newsgroup: linux.dev.kernel > > I need to generate an int15h after the kernel has booted. The BIOS only has > a real-mode verion of the function I want in this interrupt, so I can't use > an lcall to the protected mode BIOS like the APM code. I made the interrupt > in setup.S, but it seems I need to do it after each APM_SUSPEND as well, so > I still need some way of doing int15h after entering protected-mode. > > Is there a proper method to drop the kernel into real-mode, do an interrupt > to the BIOS, then fall back into protected-mode? >
No, there is no way you can do that. Linux reprograms the hardware in such a way that the BIOS no longer works.
-hpa -- <hpa@transmeta.com> at work, <hpa@zytor.com> in private!
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