UEFI boot

I purchased an ASROCK Q1900M motherboard. Its new but has a built in parallel port.

I can't get burned ISO files on either DVD or usb sticks to boot on this board.
They will boot on my son's computer
but not on another minix system that I have

This occurs when I try to use linuxcnc wheezy iso file.

I can boot windows 10 CD and was also able to burn Ubuntu 18.04 Bionic Beaver.
This with the live cd and installs fine.

I,ve tried various efi bios boot options.
tried both efi and plain boot choices and they dont work.
I have legacy support enabled in boot as well as CMS enabled.

apparently if the disk does not have an efi partition it wont boot

I have not tried the stretch ISO but suspect that it might work as debian indicates that both live and install efi are on the stretch release.

I do have a good working Ubuntu 18.04 install but alas without linuxCNC

I'm not very versed on linux so im relucant to try buildbot to install a system that way.

any help would be greatly appreciated.

Sorry not much help here, I don't recall having any trouble booting or installing on either of the two Asrock Q1900M-pro motherboards I have used (other than some minor video issues). But it has been some time ago and I may not be remembering all the details. Although I have seen stability issues with certain kernels, on the one machine, but it isn't running Linuxcnc, (it is my Mythtv computer at home.)

I have managed to get a bootable iso onto usb stick for ubuntu 18.04 now
and a bootable iso onto dvd for the linuxcnc stretch version.

I've ran that livecd and gotten latency down to around 25 to 36 uSec.

I would really love to get ubuntu 18.04 bionic beaver working with linuxcnc 2.8
but it seems a bit advanced for me just right now.

I would also like to be able to at least try out wheezy and be able to use the RTAI
kernel because i think it might lower latency.

I need to try some more to get latency down.

I havent fully worked with ACPI, sound, isolcpus, IRQs etc
also

im just using one bank of DDR3 so im wondering if 2 banks would
help. I have a pico power supply and the plug out would let me get the memory into the other bank unless i modify the plug.

Also wondering if messing around with cpu voltages would make improvements.

My q1900m-pro running the Wheezy RTAI iso has about 8000ns latency

i managed to get wheezy loaded by loading ubuntu 18.04 beside it so now ubuntu grub2 boots but now other issues

If i run the latency test all works ok and it appears to have pretty good latency.

but if i try to run latency-histogram it doesnt nun
and also if i try to run linuxcnc config that doesnt run either
it ran in live cd mode but not once loaded

If you are trying to run more than one of those at a time, it won't work.
Other wise not sure why they won't start.

No just one at a time
Its frustrating because I finally got wheezy to run
and was able to run latency test fine
and got pretty good latency figures <34
but then when I tried to do config it wont run
it does look like it actually is running to tell the truth
because it will tell me a desktop icon is being created
and the splash screen is display but thats it
then if i open a terminal
it freezes after i type two characters

Okay I did just fine for the first part
downloaded and installed
linux-headers-4.16.12-rt5-kona-rt_amd64.deb
and
linux-image-4.16.12-rt5-kona-rt_amd64.deb
Restart, hold down shift and ctrl to show grub2 menu, choose the above kernel
did uname -r and correct kernel is running

but the last part i have trouble with selecting the file i need
buildbot.linuxcnc.org/~buildmaster/dists/stretch/
has directories for 2.7 and 2.8
inside these are directories for binaries and source
now i dont know what to choose
inside amd64 binaries and source are entries for packages .bz2, .gz, and what looks like hundreds of revisions.
I dont know what to choose