1. OCR A Level (H046-H446) SLR1 - 1.1 ALU, CU, registers and buses

OCR Specification Reference AS Level 1.1.1a A Level 1.1.1a In this video we take a look at the class Von Neuman Architecture of a computer by taking the lid off a processes and examining what is inside and how it works. We discuss important concepts such as the ALU, Control unit, Registers and Buses. Key question: What are the components of a CPU, and what do they do? 00:00 ALU, CU, registers and buses 00:14 Intro 00:19 Main components of a computer 01:01 Internal structure of the CPU 01:20 Control Unit 02:18 Program Counter (PC) 03:06 Memory Address Register (MAR) 03:26 Memory Data Register (MDR) 03:53 Current Instruction Register (CIR) 04:38 Arithmetic Logic Unit (ALU) 05:22 Accumulator (ACC) 06:17 Busses 07:28 How this all relates to assembly language programs 08:37 Key question 08:46 Going beyond the specification 09:04 Other important components of the CPU 09:20 Decode Unit 09:54 Status Register 10:20 Clock 10:59 Interrupt Register (IR) 11:39 Cache 12:17 Outro For full support and additional material please visit our web site http://craigndave.org Why do we disable comments? We want to ensure these videos are always appropriate to use in the classroom. However, we value your feedback, and are happy to consider amendments due to inaccuracies. Please get in touch with us directly at: [email protected]