www.megadrum.info

Purchased assembled MD unit in 2012. Attempting to getting it running for first time after giving up in 2012. It appears I need to know whether it is an ARM unit or earlier model in order to know what update procedures to follow. Is there a way to determine this?

As per viewtopic.php?f=3&t=1252 , power it up while holding LEFT button pressed to enter the bootloader.
If it shows 'FwSUpdater 16(or 20)MHz' then it is Atmega. If it shows 'FwSUpdaterSTM32b(or a/d/e)' then it is ARM.