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RE[7]: Mega65 ideas, Laptop Mega65, Mega65 EMU in Linux, etc.

Daniël Mantione

Because the absolute mouse position that the 1351 sends is only 6 bits, there is no way to clothe a touchscreen as a mouse: Even if you try to calibrate the position, there is no way to signal a movement more than 32 pixels in one go, which can happen with a touchscreen for example if you first touch the upper-left corner and then the bottom-right corner.

Exposing it as lightpen is the right approach, and has the advantage that there already exists software that supports this. For example, there exist lightpen drivers for Geos, possibly one of the most prominent pieces of software where you may want to use a touchscreen.

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