On 18 April 2011 01:25, <[email protected]> wrote: > I went into the BIOS and played around, and I found that if I set the > parallel port to have an address 0x278 in the BIOS, then go into > stepconf and add a second parallel card at the standard address 0x378, > the parallel port has outputs -- pin 2 is x step, pin 3 is x dir, just > as I had set it up.
That seems very odd. What happens if you point stepconf at the 0x278 address and don't add a second card? cat /proc/ioports Might be interesting, you can see what the onboard p-port base address is there. > Has anyone else used this hardware? Do you have any suggestions for > what I need to do to fix or work around this situation? I could make a > whole bunch of opamps to act as voltage translators but I'm reluctant > to start down the kludge path so early, Any p-port should be safe to 5V input on the pins, so you might well be able to pull-up the outputs to the 5V from the USB port with 1k resistors, and then see if the parallel port can sink the 5mA needed to pull them down to 0V. That should give you a good, solid 0 to 5V swing. I assume you are measuring a bare port here, an opto-isolated breakout attached might give results similar to what you see. However, as you say, it makes sense to try to get a rational-feeling PC configuration first. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
