SIM360: A S/360 Simulator

Abstract

Modern, large-scale computer systems typically operate under the control of an operating system or executive program, and reserve for the exclusive use of the operating system a set of privileged instructions, which the normal users may not issue. This very necessary arrangement produces a problem of equipment availability for those who wish to develop or investigate operating systems programs, because such programs cannot be run as normal user jobs under an executive program. The thesis describes SIM360, a detailed simulator of a representative IBM S/360 computer which was written in PL/1 for OS/360 to run student programs, programs assigned as machine problems for a course in operating systems. The simulator allows programs to issue all the privileged instructions of the S/360, and thus provides a readily available tool for the study of operating systems programs.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1972
Accession Number
AD0749365

Entities

People

  • William A. Mccray

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Computer Programming
  • Computer Programs
  • Computers
  • Core Storage
  • Data Sets
  • Data Transmission
  • Debugging
  • Department Of Defense
  • Instructions
  • Instructors
  • Operating Systems
  • Simulations
  • Simulators
  • Software Development
  • Students
  • System Software

Fields of Study

  • Computer science

Readers

  • Parallel and Distributed Computing.