h6. [[Joystick]] h6(. » [[Joystick SWI Calls|SWI Calls]] h6((. » Joystick_CalibrateBottomLeft h2. Joystick_CalibrateBottomLeft h5. (SWI &43F42) |_<^{width:3em}. Entry | | |<^. -|<^. - | |_<^{width:3em}. Exit || |<^. - |<^. -| h4. Use Make this call when the joystick is know to be at the bottom left corner of its possible travel, in order that the joystick driver can calibrate the range. h4. Notes Having made a call to this SWI or [[Joystick_CalibrateTopRight]] then the other corner must also be calibrated as a pair too. Until that time [[Joystick_Read]] and [[OS_Byte 128|ADVAL]] will return an error.