IBM Y28-6616-1 IO Supervisor PLM Apr67 free download

File name Y28-6616-1_IO_Supervisor_PLM_Apr67.pdf

Y28-6616-1 Program Logic IBM System/360 Operating System Input/Output Supervisor Program Number 360S-CI-505 This publication describes the operation of the I/O supervisor within the IBM Sys- tem/360 Operating System control program. The I/O supervisor's components, the EXCP supervisor and the I/O interruption super- visor, are discussed in detail to show the internal structure and logic involved in the control of I/O devices and channels. Program Logic Manuals are intended for use by IBM customer engineers involved in program maintenance and by system program- mers involved in altering the program design. Program logic information is not necessary for program operation and use; therefore, distribution of this manual is limited-to persons with program maintenance or modification responsibilities. Restricted Distribution PREFACE This publication discusses the operation RECOMMENDED PUBLICATIONS of the I/O supervisor. It is directed primarily to IBM customer engineers and to IBM system programmers. Information required for an understand- ing of this manual is contained in the The publication is divided into an following publications: introduction and five parts to provide both general and detailed presentations of the following areas: IBM system/360: Principles of Operation, Form A22-6821