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

[NiKiZe]

so you are using pcbios and not efi?

in most cases you probably want "exit 1" in efi.

You should report this to HP so that they can fix their firmware.
Provide full information to them to reproduce (for now you are at least missing about mode, and which ipxe binary you are using)

sanboot --local is just a hack that works most of the time but with no guarantee. exit is flakey in pcbios mode but should work if bios is implemented correctly. exit 1 should always work for efi - but remember that exit equals "boot next device" and not "boot first local drive"