Low level WinNT debugger

Clarification

Sorry, I wasn't being clear before. But what I really want to know is how SoftICE gets to load so early on in the Windows boot process.


Original Post:

Hi

I was wondering whether anyone knows how low level debuggers
like SoftICE work? I am trying to do something similar but
the lowest level I can get to is to write a software device
driver, which can still be debugged by SoftICE.