I managed to install 12.0. I have a system that boots, now I have to inspect it.
I saw in the boot directory, together with the infame lua files, normal file names for the loader. I copied
pxeboot from 11.2 to 12.0, and with it I was able to boot the installer, perhaps because it loaded a
non lua loader. Now it was not any more possible to install only mounting the vnd of the read only iso image:
I had to copy the 80 GB of the mounted iso image again in the nfs server, now rw, only for putting there a new
pxeboot.
80 GB install media should be enough to install a minimal system without internet connection. But no, the internet
connection was necessary, and also a headache. At the beginning of the milenium was much easier to install
FreeBSD with internet than today. But the priority seems to be not to improve the installer, but after having spoiled it,
now to spoil the boot loader.
As said, copying pxeboot allowed to boot the kernel, but since the CD has an unnecessary /etc/fstab
that mounts the mounted CD, I ended in single user mode. I had anyway now rw files: I corrected the fstab
in the NFS server and booted again.
Well, it booted and mounted the root, but did not ask to configure an interface, perhaps because one was
configured and connected with a crossover cable to the tftp and nfs server. At the time to download the files there
were of course no internet.
I went to the shell, and saw that ifconfig did not show my wlan devices. I tested other usb wlan devices, without
success. Since at home I share internet with a neighbour, I can only connect to the internet through wlan. Well, I have a
router box that can be configured in wlan client mode: it connects with wlan to the internet and offers it to me as
ethernet. Enough? No! The ethernet interface of the computer is connected to the nfs server. Well, solved because
I had also an usb ethernet adapter that was recognized by the kernel of the installer. And after the installer downloaded
the files, it offered me to configure the wlan adapter that did not recognize before.
Do you want to know the difference between OpenBSD and FreeBSD? Just see the quality of the installer of OpenBSD.