/*AC Load Control*/
#include<conio.h>
#include<dos.h>
#include<stdio.h>

void main()
    {
        int in,status=0x00;
        while(!kbhit())
            {
                outportb(0x378,status);
                in=inportb(0x379);
                in=in&0x08;
                if(status==0x00)    /* If Pb is pressed*/
                    {
                        while(in==0x00)/* wait while Pb is pressed*/
                            {
                                delay(10);
                                in=inportb(0x379);
                                in=in&0x08; 
                            }
                        status=status^0x01;  /*Invert status old value*/
                        outportb(0x378,status);
                    }
             }
        outportb(0x378,0x01);   /*Turn off the fan before exiting*/
    }

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