It''s a non-serial mouse because the phased motion detection and mouse button lines are all wired in parallel and doesn't plug into the serial ports. Also the pins that the signals go to on the SCC are not the serial data pins, as they go to the modem and printer ports.

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I understand it's a non-serial mouse, but it is handled by the Mac's serial IC, which is a lot closer than ADB. Nevertheless, that's my incorrect assumption about the origins, then.

Having said all of that what would you suggest would be a better way to distinguish between the "ADB" and "the non-serial mouse which takes the raw phased output from the opto-electrical motion detectors". I would call it the "Plus" mouse except it is the same mouse which the Lisa and Apple II also use. Perhaps the "Classic" mouse? Then again that could be confused with the Mac Classic which uses an ADB mouse. "Parallel" mouse?