Callback is the game function keyboard assignment. For example press f key for FOV Increase. I use Foxy to program my Cougar and the /I and /O modifiers for a sim function, like FOV Increase, designates whether the pinky button is pressed (/I) or not pressed (/O). /H makes the keyboard character repeat as long as the button is pressed. Other Cougar programing systems probably use a different scheme.
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