Run U-Boot as Legacy Bios payload?

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