## Input/Output Device Driver Reference

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### Manual Response-Settings Adjustment

The values that the device driver returns to the application using it can be manually adjusted in case of unusual behavior. For example, some games may act as if the joystick is being held constantly toward one direction. If this happens, switch out of the running DOS application (e.g., by using CTRL+ESC) and execute the JOYTUNE.EXE program found in the MPCA subdirectory.

The program displays the values that the joystick device driver currently responds with when in Digital-Response mode. If you choose to change these values, you are prompted first for X-axis values then for Y-axis values. Enter three numbers for each axis representing the values that should be returned to the game or application.

Modifying these values may improve or resolve odd joystick-response problems. For example, if your program acts as if the joystick is being held constantly towards the upper left, then values the joystick device driver is returning for the centered position are too low for each axis. Try raising the middle value for each axis using JOYTUNE. You will probably need to adjust the other values as well. In most cases, you will be able to simply switch back and forth between the game that you are trying to use and the JOYTUNE program until the adjustment is refined.