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Old 02 October 2016, 23:26   #181
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Join Date: Mar 2012
Location: Norfolk, UK
Posts: 427
Originally Posted by jarp View Post
Couldn't you just multiplex mouse wheel events to 3rd button signal and then simple driver would be needed to do the decoding? Legacy software won't care about 3rd button being crazy, no?
If memory serves, for the EZMouse I used the middle-mouse button pin in output mode, and multiplexed the extra signals similar to how a Megadrive pad works: with the MMB pin in a low state, the wheel button is mapped to the left button, the fourth button, if present, is mapped to the right button, and wheel events are mapped to the lowest bit of each mouse counter.
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