----- Original Message ----- > From: "Gene Heskett" <[email protected]> > To: "Linuxcnc-Users" <[email protected]> > Sent: Wednesday, December 13, 2017 4:43:30 PM > Subject: Re: [Emc-users] ISA Cards and Wheezy RTAI?
> On Wednesday 13 December 2017 14:48:54 Todd Zuercher wrote: > >> Is there a problem with the version of RTAI on the Wheezy ISO which >> prevents it from working right on a system with an ISA card(s)? >> >> I have tried several times to install one of the newer Linuxcnc ISOs >> on an older system that has been running Linuxcnc on Ubuntu 10.04 for >> years. The Wheezy iso seems to install ok until you try to open >> Linuxcnc (or start any real time process.) > > Todd, you are aware that the ISA interface is clocked at 7.16 (IIRC) > megahertz, and that forces a huge cpu slowdown to access it? A slowdown > that later realtime kernels can't tolerate? Probably can't even do. > > Find an older Dell Dimension desktop with all pci slots in it and at > least a Pentium P4 + 2 gigs of dram. They are at least 33 megahertz at > the mobo bus. Those are often available for a big buck or less at your > local computer service shop, and they'll run LCNC from the LCNC install > of wheezy just fine. But do the install with a network cable handy as > that ISO will need a hundred or more updates once rebooted from the > installer. > > If your current interface is the parport, you'll be ok, but a Mesa 5i25 > card will offload all the stepper/encoder/pwm for spindle control > nonsense away from the computer. And it gives you a pair of parports so > you can do a lot more to/with the machine. If thats still not enough > i/o, the 7i90HD gives you 72 at a quite decent price, but you'll > probably need a spike stopper in the form of a 7i42TA for each of its 50 > pin ribbon cable sockets. > > ISA was declared dead by M$ with the event of winders 2000 IIRC. > > Cheers, Gene Heskett > -- Gene, They whole point of trying to use that old PC with the ISA slots, is because the current machine interface is an old ISA card. If I could have easily replaced the old PC with a newer one I would. If the old PC would happen to die I would probably have to buy another Mesa card and rewire the machine. But I was hoping it would not have to come to that. -- ======================================== Todd Zuercher mailto:[email protected] ======================================== ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
