"Andrew T. Foster" <afoster@berbee.com> wrote: >Unfortunately, GEOS required a little card that plugged >into Slot 7 of the Apple IIe. GEOS only required that card if you did not have an Apple Mouse Controller card in the IIe. The card provided a needed interrupt signal. Systems with an Apple Mouse provided this signal. That's why GEOS works on a IIc (no slots).