Automatic control of distributed DMAs in a PCI bus system suppor

Details Automatic control of distributed DMAs in a PCI bus system suppor Automatic control of distributed DMAs in a PCI bus system suppor

1995-06-07

1996-12-31

Asta, Frank J.

Boots, shoes, and leggings

39520007, 395427, 395848, 36424233, 364DIG1, G06F 1300

Patent

active

055903770

ABSTRACT:
A distributed direct memory access (DMA) system includes specially configured hardware connections between at least one slave DMA controller and a central, or master, DMA controller. The specially configured hardware connections allow the slave DMA controllers to request channel configuration information from the central DMA controller when peripheral devices under the control of the slave DMA controllers make a DMA request. After the channel information is transferred from the master DMA controller to the slave DMA controller, the slave DMA controller is able to process DMA requests for the peripheral devices under its control. In one particular embodiment, the master DMA controller is located in a notebook computer and the slave DMA controller is located in a docking station. The master DMA controller and slave DMA controller communicate when the notebook computer is engaged with the docking station.

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