boot parameters?

I would like to disable the quiet boot on my M8S+ (which is running Drieschel's S802 build for M8) so I can see where the system is hanging on reboots.

However, I can't seem to find where to edit the boot parameters. On my raspberry pi it's in the config.txt file.

Is this possible on amlogic boxes?

Thank you kszaq. I'll likely compile my own version to test. Was hoping there was something I was missing - but in the end, just happy to have LE on my M8S+!