Accession Number : AD0778170

Title :   FBOS - Foreground/Background Operating System.

Descriptive Note : Technical rept.,


Personal Author(s) : Turner,Dennis J.

Report Date : FEB 1974

Pagination or Media Count : 54

Abstract : A batch operating system is converted to a Foreground/Background Operating System (FBOS) for use on a Varian 620/f Minicomputer system. Entry to port no. 1 (the foreground) is via an interrupt generating graphics console facilitating user interaction with computer applications software packages. Port no. 2 (the background) is the entry to the batch operating system. Although the system which is developed supports a specific graphics console (Information Displays Inc.-IDDIOM 1.2) and a specific batch operating system (Master Operating System (MOS) designed by Varian Data Machines Inc.), the techniques used are sufficiently general that they may be applied to any similar minicomputer batch operation system and graphics console. Included in the paper are discussions of the MOS batch operating system and the major considerations underlying the design of the Foreground/Background Operating System. Particular attention is given to the problem associated with background interruptability and foreground program loading. (Modified author abstract)

Descriptors :   *Minicomputers, *Computer programming, Multiprocessors, Digital computers, Computer graphics, FORTRAN, Assembly languages

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE