Compatibility: EMS 4.0+
Expects: AH    53H
AL    subfn: 00H=Query handle name
ES:DI addr of 8-byte buffer to receive name
01H=Set handle attribute
DS:SI addr of 8-byte buffer containing name
DX    EMM Handle (as obtained via INT 67H 4300H)
                                                                  
Returns: AH    EMM status (0=successful)
ES:DI (fn 5301H) contains current name of the handle
                                                                  
Info: Named handles provide a means for separate applications to share
information in EMS pages -- assuming both applications know the
name.

EMS handle names are 8 bytes long and may contain any values,
00H-ffH.  A handle whose name is all 0s is considered to be
unnamed.

Notes: Use INT 67H 54xxH to get access to a named handle.

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INT 67H 53xxH: Get/Set Handle Name