Dual bus concurrent multi-channel direct memory access controlle

Details Dual bus concurrent multi-channel direct memory access controlle Dual bus concurrent multi-channel direct memory access controlle

1996-03-21

1998-10-27

Sheikh, Ayaz R.

395848, G06F 1300

Patent

active

058288562

ABSTRACT:
A direct memory access (DMA) controller is connected to the CPU bus of a computer system through a bus interface and is also connected to an I/O bus, which is coupled to one or more I/O controllers. Multiple channels, each corresponding to a particular I/O controller, are contained within the DMA controller. The DMA controller controls DMA transfers between the I/O controllers and the main memory of the system and allows multiple transfers to occur concurrently. The DMA controller controls transfers in part through a first arbiter which arbitrates requests for access to the CPU bus coming from the DMA channels and a second arbiter which arbitrates requests for access to the I/O bus coming from the DMA channels and the CPU.

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