When using a PPC405 connected to a MPMC on ports IPLB1/DPLB1 without logic on IPLB0, an illegal address will not cause an exception.
How do I resolve this issue?
The cause of this issue is that there is no bus logic connected that will trigger a timeout.
One work-around is to connect some PLB logic to the IPLB0 port.
Alternatively, it might be possible to set the entire memory range to map to the MPMC port by setting the following two PPC405 MHS parameters: