What happens on a DMA controller when it gets selected?
I'm trying to learn the ins and outs of an 8237A-5 DMA controller. I've been reading about it and now I've started to design it at the gate level in software. The CS pin is active low. If it gets a high signal on here, do what happens? Do all the other pins just go to high Z? What happens when it gets a low signal?
What happens on a DMA controller when it gets selected?
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I'm trying to learn the ins and outs of an 8237A-5 DMA controller. I've been reading about it and now I've started to design it at the gate level in software. The CS pin is active low. If it gets a high signal on here, do what happens? Do all the other pins just go to high Z? What happens when it gets a low signal?