> -----Original Message----- > From: gene heskett [mailto:[email protected]] > Sent: Tuesday, April 10, 2012 11:09 AM > To: [email protected] > Subject: Re: [Emc-users] Hal_parport and EPP > > On Tuesday, April 10, 2012 12:00:47 PM Stephen Dubovsky did opine: > > > I don't think a power pin has ever been included in a std > parallel port. > > http://en.wikipedia.org/wiki/Parallel_port > > > According to that, no. But I noted that it says also that > pin 25 was not > always connected to ground, and in the case I am recalling > from 20 some > years ago, the parport in question did have 5 volts on pin 25. > Serendipity? As I recall, it was on the MFC-3 card in my > amiga 2000 at the > time. I had assumed, and of course wikipedia didn't exist in > 1991, that it > was SOP. > > I sit corrected. :)
Well Google to the rescue. According to this page, the Amiga parallel port supplied up to 10 mA of +5 volts on pin 23, not pin 25. In any event, this is an Amiga proprietary setup that is not utilized in the IBM-PC world. http://freecircuitdiagram.com/pinout/871/parallel-amiga-1000-connector/ As an aside, it is fairly common for 26 pin ribbon headers that are intended for ribbon to DB-25 transition cables to have pin 26 (which is not exposed on the DB-25) connected to +5 volts. The SmoothStepper and PMDX products do this but with a jumper to disconnect pin 26 if desired. Steve Stallings ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
