On Thursday 14 December 2017 00:18:13 Todd Zuercher wrote: > ----- 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.
Ah, I figured as much, then its rather unlikely that you will find an ISA driver in any modern kernel. And I've not looked to see if a non-kernel driver might exist in linuxcnc as a loadable module. But I sure don't see anything in the man9 pages that would suggest an ISA driver module exists in this wheezy install. I'd check older machinery, but The oldest version on the premises is no older than an up to date wheezy. Thats old enough that the caps on the motherboard and in the psu will need to be replaced en-mass if you have the tools. 20-25+ years old they've got to be down to 10% of their original capacity, if not less. Do any of them have convex tops or show evidence of chemical leakage? >From the manpages: Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ 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
