2 main computer issues

Question

Question 1:

Where exactly does the internal register and internal cache exist? I understand that when a program is loaded into main memory, it contains a text section, a stack, a bunch, and so on. However, is the register located in a fixed area of ​​the main memory or is it physically located on the processor and is not in the main memory? Does this apply to cache?

Questions 2:

How exactly does the device controller use direct memory access without using a processor to schedule / move data between the local buffer and main memory?

Answer 1

The main answer:

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Answer 2

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