I've installed FreeBSD inside a VM on a laptop. As it turns out, the laptop keyboard has no Scroll Lock key, which is used for scrolling the screen back in FreeBSD's console. How can I scroll back the output without Scroll Lock?
As root, dump the keyboard map to a file
kbdcontrol -d > mykeys
Change the file so "Ctrl+NumLock" will set "Scroll Lock". Find line with scancode "base" 069, or where "nlock" fills the entire line. Edit column 3 from "nlock" to "slock". The line now looks like:
"069 nlock nlock slock nlock nlock nlock nlock nlock O"
As root, issue the command:
kbdcontrol -l mykeys
The solution was found here.