My original intent with More Power to Firmware was to put up some sample Forth code for doing graphics with mouse input in the Open Firmware implementation that Apple uses. I have included a discussion of the Extensible Firmware Interface (EFI), broadening the document’s scope.

Three complete (though prototypical) examples are included: Towers of Hanoi (textual) for EFI, Towers of Hanoi (graphical) for Open Firmware, and creation of a mouse-draggable window for Open Firmware.

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