#include <reg51.h>
	sbit RD = P2^5;
	sbit WR = P2^6;
	sbit INTR = P2^7;
	sfr MYDATA = P1;
	void main()
	  {
	    unsigned char value;
	    MYDATA = 0xFF;		
	    INTR = 1;			
	    RD = 1;			
	    WR = 1;			
	    while(1)
	     {
	       WR = 0;			
	       WR = 1;			
	       while(INTR == 1);	
	       RD = 0;			
	       value = MYDATA;	
	       ConvertAndDisplay(value);  
	       RD = 1;
	     }
	  }