Couldn't you just scan the printer port looking for 1 out of 8 switch closures?.
m On Tue, Sep 23, 2025 at 9:42 PM Scott McDonnell <[email protected]> wrote: > I am back to thinking about a joystick for the Model 100. I have a > specific reason in mind and even a specific joystick. > > My intent is to target the Atari/Commodore 64 digital joystick interface > mainly because my inspiration is the Suncom Icontroller which mounts to > the side of the machine. > > This interface is a series of 5 discrete switches to control direction > and a fire button. Very basic. > > While the parallel port would have been ideal for something like this, > it is not bidirectional and offers only two inputs. > > The serial port provides 3 inputs; still not enough > > While some multiplexing strategies might allow this to work, both of > those ports are also often used for other important purposes. > > So I started thinking about the barcode port. It only has one input, but > the joystick could be encoded into a serial stream. Maybe even using the > original barcode drivers. I don't know the specifics of the BCR > implementation here, but often they are just keyboard wedges. > > Any thoughts on this or a better solution? > > >
