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 _disable()              Disable interrupts

 #include   <dos.h>

  void    _disable(void);

    _disable() executes an 8086 CLI (clear interrupt flag) machine
    instruction to disable maskable external interrupts.

      Notes:    _disable() can be used to turn off hardware interrupts so
                that important routines can finish without disruption.
                Interrupts received while the interrupt processing was
                turned off are saved and executed when interrupts are
                enabled.

 Portability:   MS-DOS only, version 1.0 or higher