Stef (in French) confirming graphics & code are stored on the visible 64 MB + theres another 16 MB of sound samples only accessible by the DSP (hence the 80 MEGA POWER).

There's another 16 MB of ram where the assets are decompressed on the fly by the chip (he says uncompressed graphic assets could be around 128 MB -double the size, just a guess from him).

Also he confirms the FPGA is there primarily as a protection mechanism in the first place.