Excerpt from SAITOH Masanobu:
> I've not used grub2. If someone(TM) succeeded booting with grub2, it would be
> good to summarize the howto.
I haven't tried to boot NetBSD with UEFI, only legacy. But it works (legacy
boot at least) with grub2; I use Super Grub2 Disk image on older versions of
System Rescue CD:
set root=(hd1,gpt18) (or wherever)
knetbsd /netbsd-89901-noathn (or whatever is the kernel name)
You can also use parameters with knetbsd such as -c (userconf), which I needed
to boot before I commented out athn lines in kernel config (athn driver
prevented the kernel from booting).
You can run "help knetbsd" (or other grub2 command) at the grub2 command prompt.
I haven't used sysinst recently, don't even know how or if it works with GPT.