Run U-Boot as Legacy Bios payload?

[Köry Maincent]

Hello,

Does U-Boot can be built and run as a Legacy BIOS payload, like
GRUB or SeaBios?
Indeed GRUB or SeaBios have a stage 1 binary to be merge in GPT/MBR partition
table. I did not find something like that with U-Boot.
I do not want to use U-Boot with UEFI, I have already done it.
I saw U-boot can be used as Coreboot payload, but I can not find how to use
with BIOS.

Regards,

Köry