Re: [Etherboot-developers] Windows 98 slow booting

[<ebi...@ln...>]

Michael Brown <mb...@fe...> writes:

> On 16 Oct 2002, Eric W. Biederman wrote:
> > > For 5.1, it's trickier, as Eric says as if Etherboot is running above 1
> > > MB and you can't turn it off there and then.
> > It isn't a lot trickier, as there is always code that runs below 1MB
> > to jump to the entry point.   So we just need to include the
> > code in stub that jumps to the 16bit entry point.  That is a little
> > trickier because that one piece can no longer be in C. :(
> 
> It's not just the 16-bit entry point that needs it - it's also needed
> whenever Etherboot returns to the BIOS, or boots from disk.

Right.  In particular for 5.1
exit16, and xstart16 need to have the code to disable the A20 line.
Given the complexity of that code figuring out how to share code
between those two cases is desireable.

5.1 is cleaner in what actually needs to be modified, than 5.0.  It
is just more of a pain because you cannot do it in C.

Eric