| Table F.10 Firefly bus actions. |
|
| State | Bus Read | Bus Write Miss | Bus Write |
| Invalid | No Action | No Action | No Action |
| Valid-Exclusive | Supply data on bus. Next state = Shared. | Supply data on bus and get updated. Next state = Shared. | N/A |
| Shared | Supply data on bus. Next state = Shared. | Supply data on bus and get updated. Next state = Shared. | Get updated. Next state = Shared. |
| Dirty | Supply data (and update memory). Next state = Shared. | Supply data (and update memory) and get updated. Next state = Shared. | N/A |