help regarding interfacing 82c55 ic with atmega 16

#include<xc.h>

void DlyUs(int x)
   {
   x>>=3;
   while(x--);
   }
   
void DlyMs(int x)
   {
   while(x--)
     DlyUs(1000);
   }
   
void main()
   {
   int x = 0;
   TRISD = 0;
   TRISC = 0xfe;
   TRISE = 0;
   
   DlyMs(250);

   RC0 = 0;
   DlyUs(10);
   PORTD = 0x80;
   PORTE = 3;   
   RC0 = 1;
   RC0 = 0;
   DlyUs(10);
   PORTD = 0x0;
   PORTE = 0;
   RC0 = 1;
   while(1)
     {
     RC0 = 0;
     DlyUs(10);
     PORTD = x++;   
     RC0 = 1;
     DlyMs(250);           
     }   
   }