INT B3 - ZIPKEY - GET VERSION                                                   
	AH = 70h
Return: AH = major version
	AL = minor version
	CL = number of states and territories in current database
	DH = year of current database - 1900
	DL = month of current database's file date
Program: ZIPKEY is a resident ZIPCODE database by Eric Isaacson
Note:	if installed, the string "ZIPKEY" is present at offset 75h in the
	  interrupt handler's segment, and the byte at 7Bh contains the API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes.
	  version number (00h for v1.x, 01h for v2.0)