I am looking for a way to reliably detect when I boot into WinPE 4 (powershell) (or WinPE 3 (vbs) as an alternative), have I booted from a UEFI or BIOS System? (without running a third party exe as...

I had the idea of running a small service next to the OS but I'm not sure if it is possible. I tried to figure it out by reading some docs but didn't get far, so here comes my question. I read abo...

I can build and manually execute an EFI application in a UEFI environment. But, I'd like to have my application executed automatically at boot time. Is there a way to tell the bootloader to do th...

I'm interested in PC firmware programming, and am just studying the UEFI spec. To my surprise, it seems like a spec for an entire OS which is embedded in firmware. You can even write UEFI "applicat...

What part of the specification details how command line arguments can be obtained?

I am attempting to develop a simple OS. I have done some assembly programs before and have had to use INT 10h to display characters to the screen. I understand that UEFI has support for legacy BIOS...