INT 2F - MediaVision MVSOUND.SYS - GET STATUS STRING
        AX = BC06h
Return: AX = 4D56h ('MV')
        DX:BX -> status string (first byte 0Ch if no status message to display)
SeeAlso: AX=BC00h"MVSOUND",AX=BC01h"MVSOUND",AX=BC0Bh"MVSOUND"

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