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Early desire

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  • Korn, Granino A.

Abstract

EARLY DESIRE (Direct Executing SImulation in REal time) is the first of a series of entirely new floating-point equation-language systems for interactive continuous-system simulation. DESIRE systems combine high computing speed (1.3 to 4 times faster that threaded FORTRAN) with immediate direct execution: no external compiler, linker, or loader is needed. DESIRE employs an interpreted job-control language (essentially an advanced BASIC dialect) for slower operations such as interactive program entry, editing, file manipulation, and for programming multi-run simulation studies. The ‘dynamic’ program segment containing differential equations in first-order form is entered just like the BASIC statements and can freely access the same named variables. The relative simplicity of the time-critical dynamic segment permits us to compile it practically instantaneously into efficient machine code, since a simple, super-fast compiler will do. DESIRE utilizes existing, precompiled FORTRAN integration routines; different integration rules can be switched as disk overlays while the program runs. EARLY DESIRE runs on PDP-11 or LSI-11 mini/microcomputers. Future DESIRE systems will download dynamic program segments into a variety of multiple execution processors.

Suggested Citation

  • Korn, Granino A., 1982. "Early desire," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 24(1), pages 30-36.
    • Handle: RePEc:eee:matcom:v:24:y:1982:i:1:p:30-36
    DOI: 10.1016/0378-4754(82)90047-7
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    Cited by:

    1. Korn, Granino A. & Vakilzadian, Hamid, 1986. "Beyond desire: Pascal implementations of direct-executing simulation languages," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 28(2), pages 129-139.

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