Time Machine Dragon has started working on a pretty nice viewer for the LRUMP Maps, what will evolve from this we don’t know but it certainly looks nice!
The current version works for the Morgaelin map, and uses the C64 tileset instead of the EGA PC one, you can take a look here (it’s java) though I’m certain he’s still working on polishing it.
Here’s a vid in case you couldn’t run it or are just too lazy