INT 67H 4c00H: Count Active Handles

                                                     Compatibility: EMS 3.2+ 
 Expects: AX    4c00H
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 Returns: AH    EMM status (0=successful)
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    Info: This obtains the number of active EMM handles.  You might use
          this to calculate the buffer size needed for INT 67H 4d00H.

See Also: INT 67H: EMM Services
          Extended Memory Specification (XMS)
          Interrupts and BIOS Services
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