So I can successfully boot using RouterBOARD's bootloader, over TFTP into the image. It loads into RAM and boots fine - I can use the live image so to speak.
However, when it comes to applying the sysupgrade image it fails midway and the device locks up. I have tried via the UI. I did try via the terminal by downloading the image in tmpfs mounted at /tmp however wget just received a Killed signal mid download and then I got a lock up again.
Any ideas - the device is supported but I am unsure on how to go about getting the sysupgrade done.
I can compile images as well, I am compiling a snapshot build (although I'd like to rather do a 24.x build) and maybe I can use a more minimal image?
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Update 1: Netbootting 21.x image and installing that via sysupgrade seemed to work - should I try to slowly sysuprade myself to newer and newer versions?
Update 2: Upgraded from 21x. to 22.03.7 worked. I will now try to move to 23.x.
Update 3: This worked, I upgraded from 22.x to 23.0
I did an install (sucessfully) of 21.x and then upgraded again to 22.03.7. I am going to try upgrade to 23.0 now. If I can get that working on the one device, then I will also try to see what happens if I directly boot into 23.x and try install that.
Update 3: This worked, I upgraded from 22.x to 23.0
So the long path upgrade works (I am now at 23.05, I will go further once done doing my tests I need to - maybe to the 24.x release)
I also tried directly netbooting into the 23.05 image and I was able to flash that successfully, I think I may have maybe had problems as I left my TFTP server running for too long during trying to administer the devices. I now netboot, wait for TFTP to transfer totally, disconnect ethernet, kill TFTP server and then switch over to my DHCP network profile on my desktop as I wait for OpenWRT to boot so that I can get into it at 192.168.1.1.
I think maybe I was slightly impatient maybe, the flash process simply does take long and so does the boot. Lesson learnt - patience is a virtue .
That being said, the title of this post is for getting 24.0 working - I will try that later this weekend or when I get sometime and then close this issue, first I need to make use of my two devices running on 23.05 to do my tests as the package versions needed, yggdrasil, are at the minimum version required on 23.05.
(I am now at 23.05, I will go further once done doing my tests I need to - maybe to the 
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