Abstract
ISIM is a new simulation language for both 8- and 16-bit micro computers. It is derived from the interactive simulation language ISIS, which has been installed on a variety of minicomputers and mainframes over the past few years. ISIM can run on a small 8-bit microcomputer with the CP/M operating system, 48K bytes of memory and floppy discs. It also runs on the larger 16-bit com puters operating under CP/M 86 or MS-DOS, and on the IBM PC operating under PC-DOS. Its interactive graphics capability is best exploited using a graphics terminal or the microcomputer's integral graphics display (e.g., IBM PC Graphics Adapter). The language features interactive 'command' and 'program' modes and incorporates a simple editor and a file handling facility which is fully compatible with the operating system. ISIM provides a comprehensive, highly interactive, simulation environment which allows the user full control of the simulation. These features allow the simulation to be interrupted to enable the user to display or modify values of all user variables, change in tegration control variables, or perform post-mortem plots before proceeding with the execution of the run.
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