If it was an XL50 with a Lon module then the points in the controller were just exposed as Lon SNVT's and brought in as a dynamic device. It probably didn't have that many points exposed because there was a limitation because of the address tables or something like that, been about 17 years since I have messed with one. But as far as configuring the controller, programming etc, as stated previously you would need CARE and the original .PJT file. If it was an XL15C then that is a different story.