INT 15 - VMiX - "sys_setwindow" - SET ROOT WINDOW SIZE AND HOME CURSOR
	AH = 16h
	STACK:	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to I/O Request Packet
		WORD	top left corner of window (high byte = row, low = col)
		WORD	bottom right corner of window (high = row, low = col)
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=14h"VMiX",AH=17h"VMiX"
                                                                                

INT 15 - MultiDOS Plus - INITIALIZATION                                         
	AH = 16h
Note:	used internally during initialization; any other calls will cause
	  unpredictable results