mdj wrote:
On May 28, 5:08 am, "Michael J. Mahon" <mjma...@aol.com> wrote:I see. I think you'll find the Apple //e much easier to interface with sensors and other devices. The IIc is less versatile because it does not provide digital outputs on its joystick/mouse port.One way around this limitation is to use the stepper phase outputs on the disk port to provide digital outputs. At the same time, you can use the write-protect signal to provide another digital input.
Good point! I'll have to think about that some more... If all the digital I/O is made mutually exclusive with disk activity, then that would be a quite elegant solution! When I get a chance, some experiments are in order... And that brings up the question: Why didn't we see a bunch of devices interfaced to the external disk port? -michael AppleCrate: An Apple II "blade server"! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."