#include <reg51.h>
sbit P1b0 = P1^0;
sbit regALSB = ACC^0;
void main(void)
  { 
    unsigned char x;
    for(x=0; x<8; x++)
      {
        regALSB = P1b0;
        ACC = ACC << 1;
      }
    P2=ACC; 
  }