int ROM[16] = {0x00, 0x00, 0x00, 0x00, 0xC3, 0x00, 0x00, 0x76, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
word Address;
int Prev;
int Current;

void setup() {
  DDRA = 0x00;                        //Pins 22-29 (lower 8b of Address Input) 22 = 0, > 29 = 7
  DDRC = 0x00;                        //Pins 30-37 (upper 8b of Address Input) 37 = 0, < 30 = 7
  DDRL = 0xFF;                        //Pins 42-49 (8b Data Output)            49 = 0, > 42 = 7
  Prev = 0xFF;
  Address = 0x0000;
  Serial.begin(500000);

}

void loop() {
    Address = word(PINC,PINA);        //Combines PORTC and PORTA into a single 16b Value
    PORTL = ROM[Address];             //Reads from the ROM Array and puts it onto the Data Output

    Current = Address;
    if(Prev != Current){              //If the Address from one cycle beofre is the same as the Current one it will not print anything on the Serial Monitor. to keep it clean
      if (PORTL < 0x10 ) {
        Serial.print("$0");
      }
      else{
        Serial.print("$");
      };
      Serial.print(PORTL, HEX);       //Prints the Data on the current Address as HEX with leading 0.
      Serial.print("    ");
        if (Address < 0x0010 ) {
          Serial.print("$000");
          goto EOSP;
        };
        if (Address < 0x0100 ) {
          Serial.print("$00");
          goto EOSP;
       };
       if (Address < 0x1000 ) {
         Serial.print("$0");
         goto EOSP;
       }
       else{
         Serial.print("$");
       };
      EOSP:
      Serial.print(Address, HEX);     //Prints the Currently accessed Address as HEX with leading 0s.
      Serial.println();
      Prev = Current;                 //Sets the used Address as the "previous" one, so it can be compared next cycle.
      };
}