INT 94 u - Media Vision PCM.COM - GET STATUS
        SI = 000Dh
Return: AX = status (0000h = waiting) (see below)

Bitfields for status:
 bit 0  playing
 bit 1  recording
 bit 2  SBplaying
 bit 3  SBrecording
 bit 14 SBpaused
 bit 15 paused

.