Int B3 Fn 70  - Zipkey - Get Version                                       [U]

   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
     version number (00h for v1.x, 01h for v2.0)