8237 DMA Controller
8237 DMA Controller is a type of DMA Controller which has a flexible number of channels but generally works on 4 Input-Output channels. In these present channels, the channel has to be given the highest priority to be decided by the Priority Encoder. Each channel in the 8237 DMA Controller has to be programmed separately.
Direct Memory Access (DMA) Controller in Computer Architecture
DMA Controller is a hardware device that allows I/O devices to directly access memory with less participation of the processor. DMA controller needs the same old circuits of an interface to communicate with the CPU and Input/Output devices.
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