[General] IR decoding of diffrent Protocols

#include<reg51.h>
void interruptdelay(void);         //function for interrupt
void delwaste(unsigned int);	//it's to receive  the bit from  the protocol  sent by your remote	          
void DELAY(void);                             //for 13.392ms   delay to skip the reading of code upto command  
#define y P2			      //to display number in the command code  of rc5 protocol
sbit first=P0^0;
sbit sec=P0^1;
sbit third=P0^2;
sbit mybit=P3^3;						 //tsoy738 signal connected at P3^3(interrupt pin)
void timer0(void) interrupt 2           //isr routine for external hardware interrupt 
{
interruptdelay();
}
void main()
{
P3=0XFF;  //make as input
P1=0X00;   //make as output
P0=0X00;   //motors connected
P2=0X00;
while(1)
{
IE=0X84;  //low level triggered
TMOD=0X01;	  //timer 0 in mode 1 
}

}
void interruptdelay(void)
{

unsigned int z=0,y=0,t=0;
DELAY();   //13.392ms skip
		 
while(z<6)    //here in rc5 protocol the command length is of 6 bits
{
  if(mybit==0)
  {
  y=y<<1;
  y|=0X01;
  
   }
   else
   {
      y=y<<1;    
	}
   
 delwaste(1);   //1.728ms delay
  z+=1; 
}
P1=y;       //display the command code "i.e 6bits  size"

}    

void delwaste(unsigned int e)   //for e=1 creates delay of 1.728msec
{
for(;e>0;e--)
{
TH0=0XF9;
TL0=0XD4;
TR0=1;
while(TF0==0);
TR0=0;
TF0=0;
}
return;
}
void DELAY(void)   //13.392ms
{
TH0=0XCE;
TL0=0X4C;
TR0=1;
while(TF0==0);
TR0=0;
TF0=0;
return;
}