INT 1A U - DATEFIX - INSTALLATION CHECK AX = CCCCh BX = CCCCh CX = 0000h Return: CX = CCCCh if installed ES:BX -> original interrupt handler Program: DATEFIX is a public-domain 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. to correct the date on AT&TAmerican Telephone and Telegraph 6300 machines, where the realtime clock's calendar wraps after 1991 SeeAlso: AH=FEh,AH=FFh"AT&TAmerican Telephone and Telegraph"