| 摘要 |
A PCI-E automatic allocation system which essentially consists of a detection module and a switch module, wherein the detection module detects the states of the logic signals on the ground pins of a first PCI-E slot with large lane width and a second PCI-E slot with small lane width in a computer system, to determine whether the first and second PCI-E slots hold any inserted expansion card; if the detection module detects an inserted expansion card in the first PCI-E slot rather than the second PCI-E slot, a switch control signal output is generated, to control the switch operation performed by the switch module, that is, transferring lane availability from the second PCI-E slot to the first PCI-E slot, with a view to enhancing the use of PCI-E lanes, speeding up data transmission, and overcoming a known drawback of PCI-E buses, that is, inflexible design.
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