INT 2F - Quarterdeck RPCI - QEMM/QRAM v5.0+ - GET HIRAM MEMORY CHAIN
        AX = D201h
        BX = 4849h ("HI")
        CX = 5241h ("RA")
        DX = 4D30h ("M0")
Return: BX = 4F4Bh ("OK")
        CX = segment of start of HIRAM chain
        DX = reserved block owner (QEMM/QRAM code segment)
Notes:  AH=D2h is the default multiplex number, but any value in the range
          D2h-FFh and then C0h-D1h may be used (see AX=D200h for details)
        the HIRAM memory chain has the same format as the regular DOS 4.0
          memory chain (see INT 21/AH=52h), except that XMS Upper Memory Blocks
          have the block header program name field set to "UMB"; blocks whose
          "owner" field is set to the reserved segment returned in DX are
          locked-out regions such as video memory and ROMs.
SeeAlso: AX=12FFh/BX=0006h,AX=D200h

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