DRAM init as little to do with UEFI or BIOS and Intel probably ships x86 components for more exotic or even allow custom bootloaders. At least at a time they di

DRAM init as little to do with UEFI or BIOS and Intel probably ships x86 components for more exotic or even allow custom bootloaders. At least at a time they did. I don't know the current situation but when I played with all of that, I saw one of their "Memory Reference Code" in particular the parts in charge of calibration of the memory controller timing, and that was a quite short piece of x86 assembly completely independent from the UEFI architecture insanities. Well because it was written in assembly it had an obvious bug, but that's another story.