[userbinator]

This is like the reverse of the bootloaders first pioneered by the Hackintosh community to boot UEFI macOS on traditional BIOS systems.

and VESA VBIOS from SeaBIOS project

Unfortunately I believe modern GPUs without a standard VBIOS may not act enough like an IBM VGA for a generic VGA VBIOS to work, so I see another project for someone in the future: a retrofit VBIOS, especially for those GPUs e.g. Intel's for which lots of open-source driver code and documentation is available but later models no longer come with a VBIOS.

Perhaps also injecting a true CSM from an old closed-source UEFI BIOS, before they started removing it, is worth doing as in my limited experience SeaBIOS isn't as quite compatible as the closed-source ones for some edge-cases.

[mjg59]

It's actually pretty much the same as the project to get Windows running on Intel Macs before Apple released Boot Camp