cannot run latest FreeBSD on a 15 year old PC

The specifications of the PC can be found here; it's an amd64 motherboard. I did install FreeBSD on it successfully many years ago, version 12 or 13, I don't remember exactly. I decided to revive it by installing the latest version, 15.1. The installation goes well but after rebooting when the installation has completed I see message Loaded only 545k in a loop on the screen. I tried installing version 14.5 but the result is the same.

Please let me know if you want me to provide more detailed information on the hardware, for example the output of program dmidecode that I can run from a Linux installation flash drive.

Thanks in advance.
 
this looks like an error from the pmbr code from the gpt boot. how large is your freebsd-boot partition (you can reboot the installer and inspect)
also did the installer booted gpt or efi ?
 
this looks like an error from the pmbr code from the gpt boot. how large is your freebsd-boot partition (you can reboot the installer and inspect)
also did the installer booted gpt or efi ?
The error is in /usr/src/stand/i386/pmbr/pmbr.S. Literally, including the 545K boundary of something.That must cause it but the lines containing 545 don't explain a lot to me. What stops loading and fills up reserved space on a 32-bit system?
 
That must cause it but the lines containing 545 don't explain a lot to me. What stops loading and fills up reserved space on a 32-bit system?
As far as I know, it's a BIOS limitation. It simply cannot be bigger, the installer creates a 512K partition for freebsd-boot due to this limitation.
 
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