A legacy port is a computer port or connector that is considered fully or partially superseded[1]. The replacement ports usually provide the functionality of the legacy ports with higher speeds, more compact design, or plug and play and hot swap for greater ease of use; special USB adapters are often used to replicate the connectors for older devices. Modern motherboards utilize separate Super I/O controllers to provide legacy ports since current chipsets do not offer direct support for them. A category of computers called legacy-free PCs omits these ports, typically retaining only USB for external expansion.