Random number generator using pic18f4520 in mplab c18 compiler

[Mr bean]

Hi,

I tried to use Timer0 to generate 2 random numbers, using PIC18f4520 and c18 compiler in c language. But is not working. Please help me.

Here is my program.

#include<p18f4520.h>
#include <stdlib.h>    
void ISR (void); 
char i,start; 
#pragma code L_vector=0x18
void L_vector(void)
{
_asm goto ISR _endasm
} 

#pragma code
#pragma interruptlow ISR 
void ISR(void) 
{
if(INTCONbits.TMR0IF)
{ 
TMR0H=0xC2;
TMR0L=0xF7;
i=rand();
start=(i+TMR0H)%8;
j=rand();
end=(j+TMR0L)%8;
}
} 
void main(void)
{ 

 INTCONbits.GIEH=0;
RCONbits.IPEN=1;
INTCON2bits.TMR0IP=0;
TMR0H=0xC2;
TMR0L=0xF7;
T0CON=0b100000101;
INTCON=0b11100000;


while(1);
}