IBM GY28-2012-5 Time Sharing System Resident Supervisor PLM Sep71 free download

File name GY28-2012-5_Time_Sharing_System_Resident_Supervisor_PLM_Sep71.pdf

File No. S360-36 GY28-2012-5 Program Logic Version 8.1 IBM System/360 Time Sharing System Resident Supervisor Describes the internal logic of the resident super- visor, and provides a brief overview of its operation. It is intended as a reference for anyone involved in maintaining or altering resident supervisor logic. The resident supervisor schedules and dispatches tasks, provides services that might endanger system integrity if a task were allowed to execute them, handles interruptions, and deals with system errors. It 1s permanently resident in ,main storage, The first and second sections of the book are intended to introduce the reader to the functions of the resident supervisor, and to provide him with an easily used, overall presentation of resident supervi- sor logic. Interruption handl~ng is described from the point at which the interruption occurs until it has been completely processed. Paging and queuing are dis- cussed. The third and fourth sections describe in some detail the individual modules that make up the resident supervisor. These modules are discussed under the fol- lowing headings: interruption classification, queue scanning and processing, storage allocation, SVC pro- cessing, paging, I/O handling, task selection and sche- duling, and error recovery. The appendixes contain module IDs and names of supervisor routines, and SVC codes. The prerequisites for this publication are: IBM System/360 Principles of Operation, GA22-6821, and I