Some time back, Karl Clark released ArcMouse, an interface that could be plugged in to the mouse port on Archimedes-era ARM-based computers from Acorn and allowed a more standard USB mouse to be used.
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Use a USB mouse with an Archimedes
If you have an Archimedes computer that sports the mini 9-pin round socket for connecting the mouse to the computer, thanks to Karl Clark you now have a wider choice of mouse to use. Karl is selling a new interface called ArcMouse, a compact adapter that allows a standard USB mouse to be connected.
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