Describe the roles of the Program Counter (PC), the Memory Address Register (MAR), and the Memory Data Register (MDR) during the fetch stage of the Fetch-Decode-Execute cycle.
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Markscheme
Hardware Questions
76 exam-style questions on Edexcel GCSE Computer Science Hardware, covering Von Neumann architecture and FDE cycle, Secondary storage devices, and Embedded systems. Each one has a worked solution and a mark scheme showing where the marks go.