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| -rw-r--r-- | README.md | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -49,6 +49,12 @@ cannot be accessed via the "mov" instruction and instead rely on independent wrs | 2-31 | Reserved (must be 0) | Must be zero | +#### Supervisor bit +The supervisor bit may only be writable in a privileged mode of execution +and is therefore readonly in user contexts (writes ignored). It may be unset +by system software to transition the processor into a user context. This bit +may only transition from a 0 to a 1 during an interrupt/trap, therefore manually +writing a 1 to this bit is ignored by the processor. ## Instructions |