INT 21 P - Phar Lap 386/DOS-Ext VMM v2.2+ - INSTALL PAGE-REPLACEMENT HANDLERS   
	AX = 2524h
	???
Return: ???
Note:	this function takes three DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. pointers and three DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. pointers to
	  DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. pointers as arguments