Hallo Jim, > But, since they are mapped to the same pin on the IEEE connector, > even a 1 to 1 mapping seems like it would fail. In a schematic both connectors look the same. But in the real world the pinout of both the IEEE connectors are mirrors of each others. For example, have a look at the numbers of the LPT port: #1 is top-right. But #1 at its counterpart is at top left. And this is exactly the same for the edge and the connector soldered to the edge. But why did I use the LPT port as example? Eagle couldn't provide me with the male part of the IEEE connector. In fact I have never seen one on a print; all devices use the female part. So does it exist at all? > IEEE-488 is not my forte, But it is mine, I dare to say :) > I probably could fit an RTC footprint on some pins there in a way > that would not interfere with normal operation... > EEPROM would also work, if the above works. The moment the system is in rest, everythin UNTALKed, UNLISTENed and ATN = (H), you can do everything what you like to do with the IEEE lines except ATN. So you could add a serial EEPROM, RTC or whatever and handle it. But the moment the system takes over the bus again, I cannot guarantee anything. AFAIK all combinations of control signals are possible. So it is you that has to provide a mechanism that prevents the bus to address the device(s) by accident. If you want to add some ICs anyway, why not adding a microcontroller that handles the IEEE bus? Once having this controller, you can add other features, like uIEEE/SD :), the sky is the limit. But I haven't any idea where you want to draw the line. > Is there a project out that adds joysticks or IEC routines to the IEEE pins? Never heard of one. It is doable, the most simple idea would be using the 8 data lines plus two of the control lines for two joysticks with each 5 signals. But... it means you're not allowed to touch any joystick the moment the bus is needed by the system. And I don't think that that is very user friendly. Putting the joysticks behind the microcontroller I mentioned above, won't be programmer friendly and very slow IMHO. My opinion: if you want joysticks, connect them to the keyboard. > blinkelights on the signal lines, to allow it to be used for > debugging IEEE issues? Great idea, I soldered one myself as a help to debug CBM-HD :) -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| URL: Ruud.C64.org De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. APG Algemene Pensioen Groep NV is gevestigd te Heerlen en is ingeschreven in het handelsregister van de Kamer van Koophandel Limburg onder nummer 14099617 The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose it's contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. APG Algemene Pensioen Groep NV is registered in the trade register of the Chamber of Commerce Limburg, The Netherlands, registration number: 14099617 Message was sent through the cbm-hackers mailing listReceived on 2012-03-01 08:00:31
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