INT 2F - Microsoft Realtime Compression Interface (MRCI) - RAM-BASED SERVER
        AX = 4A12h
        CX = 4D52h ("MR")
        DX = 4349h ("CI")
Return: CX = 4943h ("IC") if installed
        DX = 524Dh ("RM") if installed
            ES:DI -> MRCINFO structure (see INT 1A/AX=B001h)
Note:   this call is functionally identical to INT 1A/AX=B001h, but should be
          called first, as the latter call is used for the first, ROM-based
          MRCI server, while this call is used for RAM-based servers which
          may be partially or entirely replacing a prior server
SeeAlso: INT 1A/AX=B001h

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