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In computing, a legacy port is a computer port or connector that is considered by some to be fully or partially superseded. [1] The replacement ports usually provide most of the functionality of the legacy ports with higher speeds, more compact design, or plug and play and hot swap capabilities for greater ease of use.
For example, a USB 2 PCIe host controller card that presents 4 USB "Standard A" connectors typically presents one 4-port EHCI and two 2-port OHCI controllers to system software. When a high-speed USB device is attached to any of the 4 connectors, the device is managed through one of the 4 root hub ports of the EHCI controller.
The legacy USB Type-A plug. This is one of many legacy types of USB connector. The design is intended to make it difficult to insert a USB plug into its receptacle incorrectly. The USB specification requires that the cable plug and receptacle be marked so the user can recognize the proper orientation. [30] The USB-C plug however is reversible.
Comparison of legacy USB connector plugs, omitting the current standard Type-C plugs. Unlike other data buses (such as Ethernet), USB connections are directed; a host device has "downstream" facing ports that connect to the "upstream" facing ports of devices.
The term Legacy Plug and Play, [1] also shortened to Legacy PnP, [2] ... USB uses a hub system for this purpose. When the change is located, the OS then examines the ...
In computing, legacy mode is a state in which a computer system, component, or software application behaves in a way that is different from its standard operation in order to support older software, data, or expected behavior.
A legacy-free PC is a type of personal computer that lacks a floppy or optical disc drive, ... The legacy ports are usually replaced with Universal Serial Bus (USB) ...
An older device can connect to a modern (USB-C) host by using a legacy cable, with a Standard-B, Mini-B, or Micro-B plug on the device end and a USB-C plug on the other. Similarly, a modern device can connect to a legacy host by using a legacy cable with a USB-C plug on the device end and a Standard-A plug on the host end.