int main(void) {
  UWORD OldDMACON,OldINTENA,OldINTREQ,OldADKCON;
  
  OldDMACON = custom.dmaconr | 0x8000;
  OldINTENA = custom.intenar | 0x8000;
  OldINTREQ = custom.intreqr | 0x8000;
  OldADKCON = custom.adkconr | 0x8000;
  
  custom.dmacon = 0x7FFF;
  custom.dmacon = OldDMACON;

  custom.intena = 0x7FFF;
  custom.intena = OldINTENA;

  custom.intreq = 0x7FFF;
  custom.intreq = OldINTREQ;

  custom.adkcon = 0x7FFF;
  custom.adkcon = OldADKCON;
}