const char digitPatterns[10] = {
  0b00111111, // 0
  0b00000110, // 1
  0b01011011, // 2
  0b01001111, // 3
  0b01100110, // 4
  0b01101101, // 5
  0b01111101, // 6
  0b00000111, // 7
  0b01111111, // 8
  0b01101111  // 9
};

void setup() {
  // Initialize pointers
  volatile char *direction_f, *output_f;
  volatile char *direction_k, *input_k;
  volatile long long i;

  // Set direction and initialize ports
  direction_k = (char*)0x107;
  direction_f = (char*)0x30;
  output_f = (char*)0x31;
  input_k = (char*)0x106;

  *direction_f = 0xff;  // Set port F as output
  *direction_k = 0x00;  // Set port K as input

  int startNumber = 0;  // No valid start number initially

  while (1) {
    volatile int trace = *input_k;
    int newStartNumber = 0;

    // Determine the starting number based on which switch is pressed
    if (trace & 0x01) newStartNumber = 1;
    else if (trace & 0x02) newStartNumber = 2;
    else if (trace & 0x04) newStartNumber = 3;
    else if (trace & 0x08) newStartNumber = 4;
    else if (trace & 0x10) newStartNumber = 5;
    else if (trace & 0x20) newStartNumber = 6;
    else if (trace & 0x40) newStartNumber = 7;
    else if (trace & 0x80) newStartNumber = 8;

    // Update start number if a new switch is pressed
    if (newStartNumber != 0) {
      startNumber = newStartNumber;
    }

    // Display numbers from startNumber to 9
    if(startNumber !=0){
      for (int num = startNumber; num <= 9; num++) {
        *output_f = digitPatterns[num];
        delay(500);  // Adjust the delay as needed
      
    } 
    }else {
      *output_f = 0x00;  // Clear display if no valid switch is pressed
    }
  }
}

void loop() {
  // Empty as setup() contains the main logic
}