INT 66 - DIGPAK - POSTsee Power-On Self-Test AUDIO PENDING
	AX = 0695h
	DS:SI -> Sound Data structure (***)
Return: AX = status
	    0000h sound started playing
	    0001h sound was posted as pending to play
	    0002h sound effect already pending, this one not posted
SeeAlso: AX=0696h