Before Bootcamp was a thing the community developed XOM to boot XP on Intel macs (which at the time lacked the legacy bios in it's ROM) so it should be possible
I'm not having much luck finding very much information on it though
I'm not having much luck finding very much information on it though
For the purposes of running Windows 7 on modern systems, we'd have to do the reverse, emulate a legacy BIOS environment from a UEFI system. XOM appears to fit this description, it simulates a legacy IBM BIOS on an Mac's EFI boot environment.
I only briefly Googled it earlier, but thanks for the ideas, rest assured, if I ever look into it and get Windows 7 running, I'll post about it.
Of course this won't fix your driver problems, if any.
Alternatively load and execute a CSM in your UEFI firmware, but we do not have a reference implementation of that and AMI, Phoenix do not want to share.