INT 67 - Virtual Control Program InterfaceA simple API for protected-mode programs to allocate memory and switch into or out of protected mode.  See also DOS Protected-Mode Interface. - ALLOCATE A 4K PAGE
	AX = DE04h
Return: AH = 00h successful
	    EDX = physical address of allocated page
	AH nonzero: failed
Notes:	the client program is responsible for freeing all memory allocated
	  with this call before terminating
	also available in protected mode by calling the protected-mode VCPIsee Virtual Control Program Interface
	  entry point (see AX=DE01h,#03664)
SeeAlso: AH=3Fh,AX=DE03h,AX=DE05h