X-Hacker.org- Interrupts & Ports - set alarm (at,xt286,conv,ps)

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        Set alarm (AT,XT286,CONV,PS)

        Entry:
          AH = 06h
          CH = hours
          CL = minutes
          DH = seconds
        Return:
          CF set if alarm already set or clock inoperable

        INT 4Ah will be called when alarm goes off

See Also: INT 1Ah, 07h

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