[NTVDM]: Commit what I have in my local wc so far (and which is commitable & works):

[NTVDM]: Commit what I have in my local wc so far (and which is commitable & works):
- Simplify PicIRQComplete helper function.
- Set up temporary stack for the BIOS.
- Initialize the "User Data Area" that is found at 0050:xxxx (see http://helppc.netcore2k.net/table/memory-map for more details).
- Some INT --> UINT
- Simplify few macros.
- Simplify DOS initialization; add few functions that will be useful later on.
- Remove trailing whitespace.

svn path=/trunk/; revision=68159