@azonenberg Oddly, the PMU (power management unit, starts on ROM, but needs FW load) is a hard core Microblaze. Not sure why they did that when they were already licensing ARM cores. That does add the complexity of another compiler, different JTAG debug port. The CSU (configuration security unit, only can run from ROM) is also Microblaze, both of these cores are triple modular redundant which might have been why they used their own. Also seems there's another Microblaze in the video codec.