Get list of firmware present in Compact Control Builder
You can check for the binary Files of the Controller Firmware (or clarify what do you refer as board firmware?) present under C:\Program Files (x86)\ABB Industrial IT\Engineer IT\Compact Control Builder AC 800M 5.1\Firmware\bin
Probably there are other Paths to store Firmware files as well but this would be the default.
is the link for the 5,1 version.Let me know the version you are using I will update the link accordingly