延時程序總是在軟件上運行正常，到開發(fā)板上就不能顯示是怎么回事？板子是好的

#include <reg52.h>
unsigned char code table[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char i,j;
void main()
{  
   i=0;
 TMOD=0x01;
 EA=1;
 ET0=1;
 TH0=0x3C;
 TL0=0xB0;
 TR0=1;
 while(1);
 

}

void time0() interrupt 1 
{
  TH0=0x3C;
 TL0=0xB0;
 i++;
 if(i==20)
 {
      for(j=0;j<8;j++)
      P2=table[j];
   i=0;
 }
  
}