Does a DMA controller have its own registers?

I'm trying to understand the ins and outs of how a DMA controller functions.

I'm looking at the 8237 DMA controller. Some information here has some tab开发者_JAVA技巧les with register values.

Are those the DMA's own registers, or are they the CPU's registers?

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The DMA controller registers are distinct from the CPU registers (in the case of the 8237, it's physically a different chip with different silicon). When programming, you can access the DMA controller registers using CPU IN and OUT instructions as described on the page you linked (that's the "I/O Port" column).

A different hardware architecture may provide a different method of accessing a DMA controller registers, for example they could be "memory-mapped" instead of I/O ports.