I'm trying to run NetBSD on a Dell PowerEdge R6515, and the kernel is being loaded (PXE or USB) but then the machine hangs hard.
What's the way to debug a kernel that hangs so early that you can't printf or drop into ddb? I guess that's a phenomenon quite common for a new port or changes to locore.s (or whatever that's called today), but it's completely new to me. I have virtually no clue about PeCee hardware. At the point the kernel is started, are BIOS routines still available?