Greetings all;

I have finally managed hack up a script to make an installable version of 
4.19.71-rt24-v7l+ for the pi4.

Assuming it already has the full raspbian 10.2 or later image on the u-sd 
card, goto my site in the sig, find the lathe-stf link, click on it, 
find the linuxcnc4pi4b directory and download rt-kernel.tgz.  Unpack it 
in /, reboot, and it should show a uname -a of:
Linux rpi4.coyote.den 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Thu Feb 6 
07:09:18 EST 2020 armv7l GNU/Linux

Latency is in the 16 microseconds territory, and it runs my Sheldon lathe 
with all its gingerbread, and it has a bunch flawlessly with the cpu 
speed only pushed to 800 MHz. So the pi is figuratively loafing on the 
beach. :)

Have fun all you pi4 fans.

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>


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