Hello everybody again. I saw a commit (https://github.com/openbsd/src/commit/b0a12b40c03a7847ac690bf28d53883110b63b61) that implements tftp booting using EFI's Simple Network protocol, but nothing was changed on my Pi 3b. The output is the same: boot> booting tftp0a:/bsd: open tftp0a:/bsd: Operation not permitted
Am I doing something wrong or this mode is not yet implemented?