A method and arrangement for performing direct memory access in a computer system having multi-channel direct memory access (DMA) is provided with a host computer having a main memory and a processor that runs software, a system interface bus coupling the host computer and the main memory, and multiple...http://www.google.co.uk/patents/US5781799?utm_source=gb-gplus-sharePatent US5781799 - DMA controller arrangement having plurality of DMA controllers and buffer pool having plurality of buffers accessible to each of the channels of the controllers 
