INT 1A - SND - INSTALLATION CHECK???                                            
	AX = FF00h
Return: AL = version??? (02h)
	AH = busy flag (00h if not in a SND call, 01h if SND currently active)
Note:	the SND API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. is also supported by IC (Internal Commands) v2.0, a
	  shareware TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. by Geoff Friesen which extends COMMAND.COM's internal
	  command set
SeeAlso: AX=FF01h,AX=FF02h,AX=FF04h,AX=FF05h