Re: Invoking int 0x10 from a service

Steffen Knoth <[email protected]> Fri, 11 Jan 2008 17:38:12 +0100

Newsgroups	gmane.comp.micro-kernel.l4.l4ka.general
Message-ID	<[email protected]>

Hello,

> I'm currently planning to write a VESA driver for our Pistachio-based
> OS. Video mode setting is done by calling the BIOS interrupt 0x10,
> which uses real-mode addressing, and therefore cannot be run from
> protected mode.

A question out of curiosity:
What's with the VBE protected mode entry point mentioned in the VESA VBE Core 
3 specification?
Doesn't it work? Or is it not implemented in current BIOSes? Or does it 
require kernel mode or some legacy x86 CPU stuff (such as VM86)?

	Steffen