Flow-controlled multicasts simply distribute information to multiple nodes. Reverse flow arbitration efficiently resolves arbitration conflicts. Command codes allow selective enforcement of ordering constraints. Local fault retry. Ringlet local hardware fault retry protocols are simple yet robust.
Nodes use context info to instantly and safely restart after bus reset conditions.
Speed matching buffers. SerialExpress uses speed matching buffers, rather than having links dynamically adapt to multiple speed transmissions. Reverse flow arbitration efficiently resolves arbitration conflicts. Command codes allow selective enforcement of ordering constraints. Local fault retry.