// get two numbers; consider key D as enter; 
//add them; display the result on quad 7-seg
// if result is greater than 9999 display EEEE
// note : logic for product, quotient, reminder are same. Just change operand at line 21

#include "ecen.h"

void setup(){
    volatile char *F_dir=0x30, *K_dir=0x107, *A_dir=0x21, *B_dir=0x24;
    *F_dir=0xff, *K_dir=0x00, *A_dir=0xff, *B_dir=0xff;
}

void loop(){
  unsigned long  num_a, num_b, sum;
  volatile long k;

  num_a = getTarget();

  num_b = getTarget();

  sum = num_a * num_b;
  if(sum>9999){
    outB(0xf0);
    outA(0x79);
    for(k=0;k<600000;k++);
    outB(0xff);
    }
  if(sum<=9999){
  outB(0xff);
  for(k=0;k<50000; k++);
  for(int i=0; i<8000; i++)
  printTarget(sum);
  }
}