CHAPTER 13: I/O SYSTEMS

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Network Devices Varying enough from block and character to have own interface Unix and Windows NT/9x/2000 include socket interface Separates network protocol from network operation Includes select functionality Approaches vary widely (pipes, FIFOs, streams, queues, mailboxes)
Clocks and Timers Provide current time, elapsed time, timer Programmable interval timer used for timings, periodic interrupts Support more timer requests than the number of timer by “virtual clocks”. Sort the request in the earliest-time-first order
Page 1 and 2: y I.-C. Lin, Dept. CS, NCTU. Textbo
Page 3 and 4: Objectives Explore the structure o
Page 5 and 6: A Typical PC Bus Structure
Page 7 and 8: Registers of I/O ports Data-in
Page 9 and 10: Polling Determines state of devic
Page 11 and 12: Interrupt and exceptions Privilege
Page 13 and 14: Intel Pentium Processor Event-Vecto
Page 15 and 16: Six Step Process to Perform DMA Tra
Page 17 and 18: A Kernel I/O Structure
Page 19: Block and Character Devices Block
Page 23 and 24: Two I/O Methods Synchronous Asynchr
Page 25 and 26: Kernel I/O Subsystem (cont.) Buffe
Page 27 and 28: I/O Protection User process may ac
Page 29 and 30: Kernel Data Structures Kernel keep
Page 31 and 32: I/O Requests to Hardware Operations
Page 33 and 34: STREAMS STREAM - a full-duplex co
Page 35 and 36: Intercomputer Communications
Page 37: Device-Functionality Progression

CHAPTER 13: I/O SYSTEMS

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