Igor Chudov wrote: > The bad news is that the parallel port chipset that is on my new PC's > motherboard, does not want to talk to PPMC when two encoder boards are > installed in PPMC. > > The good news is that this is the problem with the motherboard's parallel > port chipset, and the proof of it is that my old decrepit Dell PC can talk > to PPMC with two encoder boards, just fine. > > Yes, the mess of EPP timing varying wildly from one motherboard to another has been a HUGE pain in the rear, dating to 2002 or so. > The 4th axis rotary table works pretty well, except it rotates backwards > instead of forward, but that's a minor, separate story. > Just invert the sign of INPUT_SCALE and OUTPUT_SCALE. > Since the old Dell PC is falling apart and is just not powerful enough, I > would like to somehow make my new PC talk to PPMC. > > To that end, I thought to install a PCI parallel port card into the new PC. > > This, naturally, brings up two questions. > > 1) Would you recommend some honestly made, reliable, and preferably low > profile PCI parallel card? > I use a Siig, but these old ones I have need a Windows 95 program to set them to EPP mode. PCI4008A-based ports also work well. ITE and NetMOS chips seem to have been a problem. > 2) If I install a second card, how would my PC see it? With a different I/O > address (not 378?). How do I find out that I/O number? > Generally, use lspci to find the ranges of addresses, then try them. Often parport cards have two address ranges, even if they only have one port brought out.
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