INT 67H 54xxH: Find Named Handle

                                                     Compatibility: EMS 4.0+ 
 Expects: AH    54H
          AL    subfn: 00H=Query handle directory
                           ES:DI addr buffer to receive data
                       01H=Search for named handle
                           DS:SI addr of 8-byte buffer containing name
                       02H=Count all open handles
 Returns: AH    EMM status (0=successful)
          ES:DI (fn 5400H) contains returned data (see below)
          DX    (fn 5401H) handle with specified name
          BX    (fn 5402H) count of handles; use a buffer size of BX*10
    Info: This lets applications work together, sharing EMS pages, as long
          as each app knows an 8-character name.

    ES:DI (fn 5400H) returns with this buffer filled with EMS handle names.
          It is formatted as:

           Offset Size Contents
           ▀▀▀▀▀▀ ▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
            +0      2  wHandle   an EMM handle
            +2      8  abName    8-bytes of the name
                   10            size of one EmsHandleNameRec
           +0aH     2  wHandle2
           +0cH     8  abName

          Before using fn 5400, use fn 5402H to see how large the buffer
          should be.

   Notes: Names can be any 8 byte.  When a handle has a name of all 0s, it
          is considered to be unnamed.  See INT 67H 53xxH (get/set name).

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