$regfile = "M8u2def.dat"
$crystal = 8000000

Switch Alias Pinc.2                                         ' Tasterabfrage an diesem Port
waitms 200

 If Switch = 1 Then ' Call Bootloader if switch is pressing by power-on
  goto &h1000 ' goto &h800 also wont work **
 End If

do

' Here my Mainprogramm

loop

#define MAGIC_BOOT_KEY           0xDC42

  void Jump_To_Bootloader(void)
  {
      // If USB is used, detach from the bus and reset it
      USB_Disable();

      // Disable all interrupts
      cli();

      // Wait two seconds for the USB detachment to register on the host
      Delay_MS(2000);

      // Set the bootloader key to the magic value and force a reset
      Boot_Key = MAGIC_BOOT_KEY;
      wdt_enable(WDTO_250MS);
      for (;;);
  }