volatile byte x = 0;           // Declare a volatile byte variable x and initialize it to 5
volatile byte y = 0;

void setup() { 
  Serial.begin(9600);          // Initialize serial communication at 9600 baud rate
}

void loop() { 
  asm volatile ( 
    "ldi r21, 0x00\n"          // Load immediate value 0x00 into register R21
    "ldi r20, 0x45\n"          // Load immediate value 0x45 into register R20
    "ldi r16, 0xB5\n" 
    "add r16, r20\n" 
    "brcc next\n"              // Branch to 'next' if the carry flag is clear
    "inc r21\n"                // Increment R21
  "next: ldi r20, 0x79\n"      // Load immediate value 0x79 into register R20
    "add r20, r16\n" 
    "brcc over\n"              // Branch to 'over' if the half carry flag is set
    "inc r21\n"                // Increment R21
  "over: ldi r20, 0xE2\n" 
    "add r20, r16\n" 
    "sts %0, r20\n"            // Store the value of R20 into the variable x
    "sts %1, r21\n"            // Store the value of R21 into the variable y
    : "=m" (x), "=m" (y)       // Output operands: x and y are memory locations to be written to
    :                          // No input operands
    : "r20", "r21", "r16"      // Clobbered registers: R20, R21, R16 will be used and modified
  );

  Serial.println(x, HEX);      // Print the value of x to the serial monitor
  Serial.println(y, HEX);      // Print the value of y to the serial monitor
  delay(1000);                 // Add a delay of 1 second to avoid spamming the serial output
}