The not-slot clock was an hybrid component consisting of clock hardware/socket/battery you would install between a ROM chip and its socket. Its interface was on a single bit (serial) and it would be transparent when reading EPROM. A program (like ProDOS) could set and read time. The battery let the chip tick while the computer is turned off. It didn't have interrupt output or even a counter output since ROM chips are not connected to IRQ* line normally :)What was the no slot clock made of, and can that be used to create an int?
I have one in my //e. Cheers, Yves