Int 21 Fn 2D - DOS 1+ - Set System Time [D] AH = 2Dh CH = hour CL = minute DH = second DL = 1/100 seconds Return: AL = result 00h successful FFh invalid time, system time unchanged Note: DOS 3.3+ also sets CMOS clock See Also: AH=2Bh"DOS",AH=2Ch,INT 1A/AH=01h,INT 1A/AH=03h,INT 1A/AH=FFh"AT&T"