INT 10 - TSRUNIT v1.10 - INSTALLATION CHECK                                     
	AX = DAADh
	BX = check signature (different for each 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.)
	CX = 0000h
Return: CX = return signature (nonzero) if installed
	    ES = program segment prefix
Program: TSRUNIT is a Turbo Pascal unit for creating TSRs by Nir Sofer