INT 1aH 02H: Read Time from Real-Time Clock


 Expects: AH    02H


 Returns: AH    0

          AL    hours, in BCD^

          CH    hours, in BCD

          CL    minutes, in BCD

          DH    seconds, in BCD

          DL    00h = no Daylight Savings Time option

                01h = Daylight Savings Time option

          CF    NC (0) clock operating

                CY (1) clock not operating or busy being updated


    Info: Obtains the current time from the battery-backed CMOS Real-Time


          Return values are in BCD^ in 24-hour format; for instance,

          CX = 1234H = 12:34pm.

          The BIOS avoids reentrancy by not returning the time if the clock

          happens to be in the process of being updated.  Thus, if CF is

          set on return, you should try a few more times before giving up.

See Also: INT 1aH (BIOS Time I/O)

          DOS fn 2cH (get system time)

          ROM-BIOS Functions