On Sat, 27 Dec 2014 02:41:50 +0100 (CET) k...@aspodata.se wrote: > Gordon: > > A while ago, I started trying to get a chroot Debian environment > > set up on Gentoo, and ran into troubles. [...] > > It's ususally not a problem doing a chroot debian on debian using > debootstrap. The issues that you need to be aware of are to mount > /proc and any needed fs in the chroot, and that listening network > sockets can collide (you can't run sshd booth in the normal / and > in the chroot unless you use separet port numbers).
I had made a chroot on Debian, to compile OpenWRT (which is nominally Debian). That was find, doing this on Gentoo was strange. I hadn't even gotten close to /proc stuff (I believe). > > Part of what I need to set up soonish, is CNC abilities. LinuxCNC > > exists, although the preferred platform is a LTS *buntu. I want to > > work with amd64 CPUs, and it looks like having Arduino or > > BeagleBoard microcontrollers is the cheap way to interface > > EMC2/LinuxCNC to > [...] > > Can't you use a parallell port? Before I started with Linux, I was using QNX-2.x. Among other things, I had interfaced the parallel port to miscellaneous nuclear counting equipment. Eventually, we moved to a high current digital I/O board. I don't remember if the DIO had optical isolation, or we added optical isolation. It just looks like going microcontroller is going to make for a better hardware setup, based on what I did in the past. > > I haven't looked at any of the code for ChronOS, but instead of > > using the soft real-time patch that *buntu uses (and most people, > > and I am not sure it is the soft patch), the VirginiaTech group did > > use the hard real-time preempt patch. > > Don't linuxcnc use rtai (https://www.rtai.org/) ? I thought they were the same, but I will look some more. :-) > > In any event, I may be able to come up with a Devuan to the two > > different real-time CNC worlds. Something to do when I get tired of > > trying to electronics again. Plumbing is sooo much easier to > > solder. > > http://article.gmane.org/gmane.linux.distributions.emc.user/52401 > talks about linuxcnc on debian wheezy, perhaps it can be of help. > > Regards, > /Karl Hammar Thanks. Looking at VMs via QEMU, it seems my kernel is missing some capability. So, I am starting by downloading a newer kernel, playing make menuconfig (or the genkernel version) again, and moving on from there. As I just started with Gentoo this year, I only have the 1 working kernel, and I liked to have 2 different kernels when I was running Debian. Gord _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
