DDC_REG
bus.cookie = (void*)DDC_REG;
uint8 tmp = ReadReg8(DDC_REG);
WriteReg8(DDC_REG, tmp | 0x13);
WriteReg8(DDC_REG, tmp);
uint8 reg = ReadReg8(DDC_REG);
WriteReg8(DDC_REG, reg);