Isn't the BIOS supposed to be a mini-OS. It provides a common interface for different hardware platforms so software works on all of them. Of course then our a

Isn't the BIOS supposed to be a mini-OS. It provides a common interface for different hardware platforms so software works on all of them. Of course then our address space increased, so you can only use many of those BIOS features in real mode. Then modern OS's reimplented those BIOS features. What we have now is an old mini-OS that has been hacked around to run modern OSes. UEFI is a welcome solution to that problem.