This book gives a complete and systematic account of the I/O software system of minicomputers, the writing of new drivers and privileged processes to perform I/O operations. This book should be ideal for researchers and professionals who have a general understanding of the nature of programming and assembly language. It enables the readers to transfer their expertise readily to other computers and also prepares them for employment as I/O software engineers. Contents:Functions of a DriverQIO Directive Formats and Synchronization ModesMemory Management and Address MappingComponents of Drivers and Their ClassificationSystem Pool and Related Questions of System GenerationInterrupt Processing of DriversCase Study — Line Printer Driver LPDRVPre-Processing and Post-Processing of QIO RequestsLinking and Debugging of DriversPrivileged Processes for I/O OperationsApplication of an ACPGeneral Characteristics of an ACPEnable and Disable Operations of an ACPCase Study — NDACP for Name List and DQ Cell List ProcessingSystem Services Available to I/O OperationsFile Control Services FCS Readership: Software systems managers, control engineers using computers for process control, engineers designing computer interface systems and students of control engineering and computer science.