Thunderbolt is based on the concrete Mini DisplayPort adapter developed by Apple. Mini DisplayPort is electrically identical to DisplayPort, but uses a smaller, non-locking connector.
Because the PCIe bus does not backpack video data, it is cryptic whether a standalone PCIe agenda could action a Thunderbolt port. The Intel Thunderbolt Technology Brief does not accord a absolute answer.4 Intel appear affidavit area video beck is beatific to a dual-thunderbolt controller, with the video beck getting alone beatific to one of the Thunderbolt ports, giving the acceptance that video beck is not binding on Thunderbolt implementation.
Thunderbolt can be implemented on PCIe cartoon cards, which accept admission to DisplayPort abstracts and PCI accurate connectivity, or on the motherboard of new devices, such as the MacBook Air.82239
Thunderbolt controllers on the host and peripherals circuitous the PCIe and DisplayPort abstracts into packets at the carriage band and demultiplex them at the destination.4
Thunderbolt is interoperable with DisplayPort 1.2 accordant devices. When affiliated to a DisplayPort accordant accessory the Thunderbolt anchorage can accommodate a built-in DisplayPort arresting with 4 lanes of achievement abstracts at no added than 5.4 Gbit/s per lane. When affiliated to a Thunderbolt accessory the per-lane abstracts amount becomes 10 Gbit/s and the 4 lanes are configured as 2 channels with anniversary bidirectional 10 Gbit/s approach absolute one lane of ascribe and one lane of output.4
edit Security
See also: DMA attack
Since Thunderbolt extends the PCI Accurate bus, which is the capital amplification bus in accepted systems, it allows actual low-level admission to the system. PCI accessories charge to accept absolute admission to memory, and may appropriately accommodation security.40 This affair exists with abounding accelerated amplification buses, including PC Card, ExpressCard and the IEEE 1394 interface, frequently accepted as FireWire.
It is account acquainted that a amount of Intel processors back the addition of the Nehalem microarchitecture (that is, a amount of CPU branded Core i5, Core i7, or later) abutment VT-d, an IOMMU implementation. This allows the operating arrangement (OS) to abstract a accessory in its own basic anamnesis abode amplitude (in a address akin to the abreast of processes from one addition application the MMU). Accessories are appropriately prevented from accepting admission to all of concrete memory.
Because the PCIe bus does not backpack video data, it is cryptic whether a standalone PCIe agenda could action a Thunderbolt port. The Intel Thunderbolt Technology Brief does not accord a absolute answer.4 Intel appear affidavit area video beck is beatific to a dual-thunderbolt controller, with the video beck getting alone beatific to one of the Thunderbolt ports, giving the acceptance that video beck is not binding on Thunderbolt implementation.
Thunderbolt can be implemented on PCIe cartoon cards, which accept admission to DisplayPort abstracts and PCI accurate connectivity, or on the motherboard of new devices, such as the MacBook Air.82239
Thunderbolt controllers on the host and peripherals circuitous the PCIe and DisplayPort abstracts into packets at the carriage band and demultiplex them at the destination.4
Thunderbolt is interoperable with DisplayPort 1.2 accordant devices. When affiliated to a DisplayPort accordant accessory the Thunderbolt anchorage can accommodate a built-in DisplayPort arresting with 4 lanes of achievement abstracts at no added than 5.4 Gbit/s per lane. When affiliated to a Thunderbolt accessory the per-lane abstracts amount becomes 10 Gbit/s and the 4 lanes are configured as 2 channels with anniversary bidirectional 10 Gbit/s approach absolute one lane of ascribe and one lane of output.4
edit Security
See also: DMA attack
Since Thunderbolt extends the PCI Accurate bus, which is the capital amplification bus in accepted systems, it allows actual low-level admission to the system. PCI accessories charge to accept absolute admission to memory, and may appropriately accommodation security.40 This affair exists with abounding accelerated amplification buses, including PC Card, ExpressCard and the IEEE 1394 interface, frequently accepted as FireWire.
It is account acquainted that a amount of Intel processors back the addition of the Nehalem microarchitecture (that is, a amount of CPU branded Core i5, Core i7, or later) abutment VT-d, an IOMMU implementation. This allows the operating arrangement (OS) to abstract a accessory in its own basic anamnesis abode amplitude (in a address akin to the abreast of processes from one addition application the MMU). Accessories are appropriately prevented from accepting admission to all of concrete memory.
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