XMS 02H: Release High Memory Area

                                                     Compatibility: XMS 2.0+ 
 Expects: AH    02H
          ──────────────────────────────────────────────────────────────────
 Returns: AX    status: 0000H = successful
                        0001H = error and BL=XMS error code (if BL >= 80H)
          ──────────────────────────────────────────────────────────────────
    Info: Releases control of the HMA▲ after a previous call to XMS 01H
          (request HMA).

          Applications which use the HMA must release it before
          terminating.  Once released, any code or data in it is lost.

See Also: XMS Functions
          Extended Memory Specification (XMS)
          DOS Functions
                                    -♦-