HP 50g questions

[Lode]

I found an interesting thread referencing your program here:

http://www.hpmuseum.org/forum/thread-3786.html

Found by searching for "BINT103", for which I searched because to be honest I've got no clue what this program is doing! It seems to be a lot about flags, I'm trying to see anything that's an actual meaty matrix operation operation in those commands but none look like that. What's the main magic command in there?

EDIT: found it, it's DIAGMAP, and it's available in the catalog of the 50g by that name (and is the "FPTR 7 134" above)