I've only tried booting openbsd a while back but it worked pretty well, with "pftf/RPi4"I was even able to use UEFI HTTP Boot (manually setting it to the img URL), but since then USB boot is actually possible without this bootloader, native pi bootloader is capable to direct USB boot, no SDcard is needed at all, it also now supports (beta) network-install boot, if not sdCARD or USB drive with a bootable OS is detected you can hold shift for a a few secs to load network install, ofc this is more usefull for the comon "pi distros" because it means you can now do full install from the pi4/pi400 without any other machine involved, for openbsd this would mean having a img in a thumb drive I suppose, but still for the main purpose, you can totally just boot from USB, just be sure to be running the latest bootloader or the beta[1] if you want the network boot install option too.
[1] https://www.raspberrypi.com/news/network-install-beta-test-your-help-required / On Sun, Feb 20, 2022 at 7:26 PM Brian Sandro <brian.dro...@gmail.com> wrote: > On 02/20/22, Tobias Ammann wrote: > >Hello, > > > >Has anyone here managed to install and run OpenBSD on a Raspberry Pi 400 > >If so, how? > > > >Cheers, > >Tobias > > > Hi! > I've used it for about a year, runs pretty nicely; ARM64 page mentions > getting an EDK2 UEFI bootloader[1] (on microsd) to use an external USB > harddrive as a primary disk so that's what I did. It was pretty > straightforward and everything that works on "plain" pi4 works just fine on > 400. There are even some pages on the internet describing the whole > process; I vividly remember the need to set up couple of options in said > uefi loader, namely hardware tree initialization has to be "dtoverlay+uefi" > and the memory limit has to be disabled. > > [1] https://github.com/pftf/RPi4 > > > -- > Brian Sandro. > >
