how to set up nvme

I read the comment by sthibaul on lwn.net. The post says to test the 
nvme driver from rump. I would like to, so I tried using the 
documentation from

https://darnassus.sceen.net/~hurd-web/hurd/rump/rumpdisk/

and

https://darnassus.sceen.net/~hurd-web/hurd/running/flash_qemu_img/

Instead of switching hd occurences to wd I set it to ld.

I guess the correct naming is nvme instead of ld:

https://man.netbsd.org/nvme.4

My BIOS does not detect the NVMe hard disk now. I guess the correct 
naming is necessary for the BIOS. Is there any documentation that I 
missed I should read. Searching for nvme does not bring up much in my 
e-mail.

What is the MAX memory? When I try booting from kvm I use -m 4G and it 
crashes during bootup around dmalloc. 3G seems to work though. I read 
one having 12 G. My computer has about 20G total.

Thanks!

Eric