The document discusses I/O systems and provides details on various I/O concepts including hardware components, buses, controllers, devices, polling, interrupts, direct memory access, blocking vs non-blocking I/O, synchronous vs asynchronous I/O, buffering, caching, error handling, and kernel data structures used for I/O management. It covers topics like I/O instructions, memory mapping, device addressing, interrupt handling, DMA transfers, blocking behavior, and interfaces for applications to perform I/O.

1. Chapter 13: I/O Systems

3. A Typical PC Bus Structure

4. Device I/O Port Locations on PCs (partial)

7. Interrupt-Driven I/O Cycle

8. Intel Pentium Processor Event-Vector Table

10. Six Step Process to Perform DMA Transfer

13. A Kernel I/O Structure

14. Characteristics of I/O Devices

17. Two I/O Methods Synchronous Asynchronous Kernel

19. Device-status Table

23. Use of a System Call to Perform I/O

25. UNIX I/O Kernel Structure

27. Life Cycle of An I/O Request