How exactly do you add support for the DG1 GPU to a BIOS?

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

I’m trying to add support for the asrock D1541D4U-2T8R.

Pretty sure I was able to inject the option rom, but the system still bootloops with the GPU installed.

is there something i’m missing?

2

@jorgp2

Can you explain which dg1 .rom file you used and how you inserted it?