Chapter13:I/OSystemsChapter13:I/OSystemsObjectivesOverviewI/OHardwareATypicalPCBusStructureI/OHardware(Cont.)DeviceI/OPortLocationsonPCs(partial)PollingInterruptsInterrupt-DrivenI/OCycleIntelPentiumProcessorEvent-VectorTableInterrupts(Cont.)DirectMemoryAccessSixStepProcesstoPerformDMATransferApplicationI/OInterfaceAKernelI/OStructureCharacteristicsofI/ODevicesCharacteristicsofI/ODevices(Cont.)BlockandCharacterDevicesNetworkDevicesClocksandTimersBlockingandNonblockingI/OTwoI/OMethodsKernelI/OSubsystemDevice-statusTableSunEnterprise6000Device-TransferRatesKernelI/OSubsystemErrorHandlingI/OProtectionUseofaSystemCalltoPerformI/OKernelDataStructuresUNIXI/OKernelStructureI/ORequeststoHardwareOperationsLifeCycleofAnI/ORequestSTREAMSTheSTREAMSStructurePerformanceIntercomputerCommunicationsImprovingPerformanceDevice-FunctionalityProgressionEndofChapter12