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     A side effect of this function is that the clock chip's interrupt
     level (IRQ8) is enabled.
 
     Only one alarm may be active at any given time. The alarm occurs
     every 24 hours at the specified time until it is reset with Int
     1Ah Function 07h.
 
     The program using this function must place the address of its
     interrupt handler for the alarm in the vector for Int 4Ah.
                                    -♦-