INT 21 - WATCH.COM v3.2+ - INSTALLATION CHECK AX = 7761h ('wa') Return: AX = 6177h Note: WATCH.COM is part of the "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." package by TurboPower Software SeeAlso: INT 16/AX=7761h