Garbage in HP50g ERAM when battery low

[TravisE]

I don't think font settings are stored in system flags (installation of custom fonts definitely is not, at least). You will have to save this separately, or arrange to have the desired font reinstalled after the system is restarted. Creating a program named STARTUP in the HOME directory is a good place for this, as well as restoring other desired settings; this program will be executed automatically upon each warm restart.

ijabbott has a good point: It might be worth trying a new backup battery. Extensive corruption of Port 1 seems like an odd symptom even considering a sudden power loss. I've never encountered that myself. I use NiMH AAA batteries but always replace them before or as soon as the low battery indicator appears. I don't take chances with letting them run out completely. (Even on the rare occasions when they have run out completely I have not seen this behavior.)