THE GRAIL LOGICAL INPUT/OUTPUT PROCESSES

Abstract

The Memorandum on the operation and organization of the interactive, on-line GRAIL system describes the logical I/O processes that transmit data between primary and secondary storage. Such transfers involve 'reading' from secondary into primary storage and 'writing' from primary into secondary. Four types of data sets are considered: (1) ring structures--list structures linked unidirectionally that represent secondary storage space allocations and the logical descriptions of user-drawn processes; (2) display frames--the internal representation of the displayed information; (3) text planes--the internal representation of user-supplied character strings (text display frames); and (4) read-only process groups--collections of executable programs. Data transmission is synchronized with other system operations to optimize response time and exploit the parallel processing organization of the system software.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1970
Accession Number
AD0708025

Entities

People

  • J. F. Heafner
  • T. O. Ellis
  • W. L. Sibley

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Audio Tapes
  • Cathode Ray Tubes
  • Command And Control
  • Computer Science
  • Computers
  • Couplings
  • Data Sets
  • Decoupling
  • Language
  • Parallel Computing
  • Parallel Processing
  • Personality
  • Recording Systems
  • Records
  • Skeleton
  • System Software
  • Tape Recorders

Readers

  • Computational Linguistics
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.

Technology Areas

  • Space