This is what I was using in a Falcon 20 before they put in one of those King 900's, I thought the 900 was great. The Global did not have a database, everything was entered using lat/long. It held 1 flight plan (the active one) only 9 waypoints and you had to tell it where it was when you turned it on.
I did find this about the 900:
The KLN900 (ORS 02 and later) can be configured to
lock any number of the first consecutively numbered
flight plans. A locked flight plan cannot be modified or
deleted. Creating locked flight plans is useful to stan-
dardize operations for fleets.
NOTE: Waypoints in locked flight plans will not have a”:”
between the waypoint number and identifier indicating
that the waypoint can’t be edited. An “FPL LOCKED”
scratch pad message will be generated if an attempt is
made to modify or delete a locked flight plan.