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joystick port mouse and/or lightpen


jrhodes

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Light Pens and Mice both require 5V to operate. The TI Joystick port does not provide that, so you would need to put something between the joystick adapter and the device to inject the necessary 5V on the correct input pin of the device. The TI Trackball from WICO has to do the same thing (It gets the 5V from a directly connected power supply)..

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