Input/output and interrupts

Start with interrupts

The note Interrupts is a starting point for understanding how a device gets the CPU's attention. It describes interrupt priority and explains that interrupts can take processor time only from tasks with lower priority. Read the note first, then use the flashcards on interrupts for A-level Computer Science to review the topic.

Explore input and output

For a broader view, look at the mind map Input / Output. It covers external devices and functions of an I/O module, including control and timing, communication, and data buffering. Another input/output mind map brings together I/O modules, controllers and categories of external devices. Compare the terms in the maps and follow their branches to see how each resource organizes them.

The introductory computer systems flashcards ask about I/O speed, the mismatch between CPU and I/O speeds, and what is needed to make I/O work. Use those questions after looking at the maps, then return to a branch when you want to check a term.

Use maps and questions together

There are no quizzes listed on this page, but the flashcard decks offer questions to work through alongside the maps. The Computer Organization - Chapter 7 deck asks about external device categories, I/O module functions and I/O operations. Try answering a question before checking a relevant map, then use the map to organize the terms you want to study again.

Place the topic in its unit

Input/output and interrupts is a section of the Computer Architecture and the CPU unit in Computing and ICT. The page also lists flowcharts on buses, giving you another format to explore within this section. Choose a map, note or flashcard deck and work through it at your own pace.