> > Unfortunately that circles back to the mesa availability problems :-( > > 5i25's are not available? I haven't checked recently. >
You can almost replace the Mesa store by an out-of-stock sign ;) > Would a 7i92 also work? > > It looks like it would, its basicaly a 5i25 with a cat connector > replacing the pci interface of the 5i25 and if the H version is available > that would simplify cable making, db-25's have been problematic as the > cable can work loose in the center of the cap, losing 1 or more > connections. Urgh. Even when screwed in? I have not had similar problems with the 26 pin header style > and you can easily get both cables out to their respective bobs with only > one style of common connector. I also would prefer the H. But you guessed it - not in stock :-( Up to 5 feet, I don't worry about it. > Should be less - but good to know. I consider that just as > important, and explains why I went with a 7i90 on the pi, reflashed to an > SPI interface. Which on the pi's, writes a 32 bit serial data packet to > the 7i90 at 42 megabaud, and reads back at 25 megabaud. Apparently > without interference from the net port. That could probably be done with > a bash script, making it relatively painless. > I find SPI also quite interesting. But I am not aware of a PCI(e)-SPI card. I don't want to be tied to using the RPi. > Seems I either need to go with Remora or a Parallel BOB. > > And I would probably have to get a PCI/PCIe Parallel Port. > > I don't get any hits for cnc stuff out of a DDG search for Remora. link > url? > https://github.com/scottalford75/Remora-NVEM And the NVEM boards are at around 60-80 USD. Not a Mesa but... > > How come the 5i25 is faster? > > mobo parports are usually accessed thru the bios, which generally takes > some number of microseconds just to wade thru the bios code and do it. > The 5i25, sitting on the pci bus can update its outputs or read its > inputs in sub-microsecond time frames. > The parallel port I'd be getting would also be PCI/PCIe. So I guess that would be fine then. The old PC should arrive on Tue/Wed. Not sure what I will find. Fingers crossed :) So the advantage of a single 7I92 vs getting two PCI(e) Parallel Ports is that the Mesa holds the stepgen. Other than that it would be about the same - just connecting a simple 15 USD BOB. Right? _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
