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Instruction Sets & Addressing Modes

AQA 75174.7.3A-levelLesson packSubscription
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Set it as homework or classwork and every answer is marked as pupils go, with feedback on what they got wrong. The scores go straight into your mark book, so you can see who needs help before the next lesson.

  • 9 questions
  • 29 marks
  • about 45 minutes
  • marked instantly

Question types: multiple choice, calculation, short answer, multi-part, extended answer.

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About this resource

Understand that an instruction set is processor-specific and instructions consist of an opcode and operand(s). Apply AQA's simplified model (addressing mode incorporated into the opcode bits) to calculate the number of possible opcodes and instruction length, and understand and apply immediate an…

18 slides.

Lesson outline

  1. Retrieval: The Fetch–Execute Cycle (from last lesson)
  2. Key Vocabulary
  3. Quick Check — Reading the Glossary
  4. What's Inside an Instruction?
  5. Anatomy of an Instruction — the Bit Field
  6. Hinge Check — Opcode or Operand?
  7. AQA's Simplified Model: Addressing Mode Lives Inside the Opcode
  8. The Bit-Allocation Calculation — Worked Example
  9. Hinge Check — Which Bits Count?
  10. Practise — Bit-Allocation Calculations
  11. Immediate vs Direct Addressing
  12. Same Digit, Different Meaning
Unit bundlePaper 2
Part of: Paper 2: the whole unitEvery resource in the unit in one zip.

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