HP server exit iPXE boot from disk red screen with illegal opcode error

[schug]

My workaround for those cases like ProLiant servers in legacy BIOS mode is to chain grub4dos (verified on DL160 G5/G6 and DL360/DL380 G5/G6/G7/Gen8/Gen9 servers).

Code:

:boot_local_disk
chain http://boot.example.net/grub.exe --config-file="rootnoverify (hd0);chainloader +1" || reboot

Please note that grub4dos seems to be a more or less dead project but the lastest available release on Source Forge (http://grub4dos.sourceforge.net/) works for me.
You can safely ignore any references to gna.org on the web site. GNA was shut down earlier this year, but the project's older web site on Source Forge is still alive. To my knowledge there was never a newer release than 0.4.4 which you can still find on Source Forge as well (http://prdownloads.sourceforge.net/grub4...-0.4.4.zip).