yep, I added support for RL78/G23 protocol, used its new feature "disable debug interface", and wasn't able to enable it back. It's disabled really well.
Though It's not confirmed yet that new Syscon uses RL78/G23 series (in progress)
Thanks to 15432's work, I was able to dump the syscon of SAB-001 board easily.
Instead of irfhs8242, I tried irfhs8342 which is cheaper. It glitches under a second. I just wanted to add that.