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INT 76h (118) (IRQ 14)   Fixed Disk Controller (AT)

      HARD DISK CONTROLLER (called by hardware 8259-2 IRQ 14)

         When the hard disk controller has completed its task, it signals
         completion though hardware activation of int 76h.  The status in
         hdsk_int_flags is set to "done", a value of 0FFh.  Interrupt 15,
         function 91h may also be called to signal the interrupt is done.