INT 66 - IBMSND driver, DIGPAK - PLAY 8-BIT DIGITIZED SOUND                     
	AX = 0688h
	DS:SI -> SNDSTRUC (see #03519)
Return: ???
Program: The IBMSND driver is part of John W. Ratcliff's
	   The IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. Digitized Sound Package
	DIGPAK is a set of digitized sound drivers written by
	  John W. Ratcliff, The Audio Solution, Inc.
InstallCheck:	test for a valid signature string six bytes prior to the
	  interrupt handler; this string may be either "KERN" or "MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer." (in
	  the latter case, call AX=0701h to determine whether IBMSND is
	  installed)
SeeAlso: AX=068Bh,AX=068Fh,AX=0701h


Format of IBMSND driver SNDSTRUC:
Offset	Size	Description	(Table 03519)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> audio data
 04h	WORD	length of audio data in bytes
 06h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> playback status flag
 0Ah	WORD	playback frequency