Int 66 Fn 0701  - IBM Digitized Sound Package Midi Driver - Get Digitized  [s]

   AX = 0701h

Return: AX = digitized sound capabilities
       0000h if digitized sound driver (functions 06xxh) not available

Note:  the installation check for the MIDI driver is to test for the signature
     "MIDI" six bytes before the interrupt handler

See Also: AX=0688h