What's New:
- Improve MGetVdmPointer and VdmMapFlat to consider mode argument
- Add dummy functions for memory hook/allocation
- Support Virtual Device Driver (thanks Mr. cracyc)
- Improve INT 21H, AH=30H to return 5.00 as DOS version
- Improve INT 21H, AH=3306H to return 5.50 as true DOS version