The Memory Management field specifies the implementation of the memory management unit (MMU).
- To disable the MMU, set this parameter to None (0), which is the default.
- To enable only the User Mode and Privileged Mode instructions, set this parameter to USERMODE (1). To enable Memory Protection, set the parameter to PROTECTION (2).
- To enable full MMU functionality, including virtual memory address translation, set this parameter to VIRTUAL (3).
When USERMODE is set, it enables the Privileged Instruction exception. When PROTECTION or VIRTUAL is set, it enables the Privileged Instruction exception and the four MMU exceptions (Data Storage, Instruction Storage, Data TLB Miss, and Instruction TLB Miss).