Linuxcnc Image for Raspberry Pi 3

After some research and fiddling, I was able to get the 2.8.0 image to boot on my PI 3B!

In config-rt.txt file on the SD card (once the image was flashed to the SD using the Raspberry PI tool) I changed this:

[pi4]
kernel=vmlinuz-4.19.71-rt24-v7l+
force_turbo=1

to this:

[pi3b]
kernel=vmlinuz-4.19.71-rt24-v7l+
force_turbo=1

I still got the CPU 0 error on initial power up, but it seems to boot and work just fine. 

On version 2.8.1, I did the above, plus renamed the kernel from kernel7l to kernel, and it booted just fine as well!

not understand what is compile and how need do ? or have ready to use image to rpi3.
i looking make rpi3 linuxcnc small cnc my son.
or how kernel need use or how can change kernel or what need doing. too hard all linux system but have only what can use good whit linuxcnc and rpi3 board. not want buy old computer and paraller port use this.

this link has only pi 4 images, not any oi 3. what need doing can use pi 3 and linuxcnc, what is patch and how need doing, or what need doing, not understand , ready to install pi 3 image only need how need patch or what this mean and how change kernel if need no understand anything linux and code, secret engineer language all.

masawee wrote:

this link has only pi 4 images, not any oi 3. what need doing can use pi 3 and linuxcnc, what is patch and how need doing, or what need doing, not understand , ready to install pi 3 image only need how need patch or what this mean and how change kernel if need no understand anything linux and code, secret engineer language all.

This is getting silly, 3 times you post, I did try to help you with your first post. You didn't say you were using RPi3B to begin with. I did politely ask what your native language was, so we could find someone to help you, as it quite clear English is not your first language.
First of all I think you need to find some Linux info in your own language, this forum is not here how to teach people how to use Linux takes way too much time. Anything Linuxcnc we can help.

forum has made help any peoples how do linuxcnc to raspberry etc other linuxcnc problems, forum need help and teach all newbie how make somethink. my own language not have forum and maybe not many peoples who can help newbie user, Finnish language need be. but i believe not have many peoples. i has build many many cnc machine before but now think need one small simple dovetail tool made whit my old rpi3 board but search google lot and not have any image what can use, all has only lot problem code and install and what have kernel compile or what need doing not understand and know what need doing. need only image what can install to SD card simple not more need doing. same than normal computer can install linuxcnc 2,8,4 my daily used cnc machine, easy simple fast install and setting workig. no problems, why not has made normal image to SD card and can use similar than computer this working. not big job all computer engineer gurus and nerds. all not have nerd and understand linux code but lot have peoples who want use rpi3 cnc.