WP34S: Reset when printing statistical registers?

[Marcus von Cube]

Here is a short summary of the possible startup messages:

Memory is lost and no backup in flash: "Erased"

Memory is lost but a valid backup exists in flash: "Restored"

Memory seems to be intact: "Reset"

"Reset" is an indication that the processor failed for some reason, be it a programming error (illegal instruction, stack corruption, etc.) or some physical condition (power too low for the selected processor speed).

To create a valid backup of RAM in flash press ON+STO twice. This way, you can safeguard your work in case of a bad crash corrupting user RAM space. If you want to reflash you unit with new firmware, do not use the ERASE function of the programming cable but press ON+S twice. This will put the device in programming mode without completely erasing the flash beforehand. Your backup will be retained and automatically restored when you restart your calculator after the update. Flashing will always kill user RAM contents so make sure you have a decent backup in flash!