[gPXE-devel] About !PXE and UNDI_LOADER

[Michael Brown]

On Friday 25 Jun 2010 04:39:51 Sean Shoufu Luo wrote:
> I would like to have a try of Glenn's idea if UNDI Loader cannot functions
> well, that's must be interesting! While, as Michael said, the key is
>  various BIOS services become available or unsafe to use. Is it possible to
>  modify OS or add some function to reactive these services?

Anything along those lines would almost certainly have to be specific to a 
particular version of a particular BIOS; it couldn't be a general solution.

> EFI, sounds good! Maybe it is more valuable for me to try it, which my boss
> talked about with me and suggested to do some investigation about, several
> days ago. Any instructions about it?

Look at Geoff Lywood's "snpnet" driver for an example of how to use the EFI SNP 
API.  You will be using the EFI runtime services rather than boot-time 
services, so you will need slightly different code to locate the device in the 
first place.

Michael