GPSSR(ID:6571/gps017)References: THE GPSSR FAMILY What I shall here, for the sake of brevity, call the GPSSR family of GPSS dialects was developed at the University of Western Ontario, mainly under the leadership of D. Martin, and then made available through the firm Simulation Software. The following information is based on (Richards 1987 and 2001). The first product released was GPSS10, developed for DEC PDP-10 and written in assembly language and BLISS10. It was mainly based on GPSS V. One advantage over GPSS V was that it had an interactive debugger. This was in 1980 followed by GPSS/VX for DEC VAX/11, written in BLISS32. It had compiled expressions and an enhanced interactive debugger. 1981 saw the release of GPSSR for DEC PDP-11, written in C. Among the new features one can mention that SNAs could be used in any field, including FUNCTION definitions. A restriction was that the simulator and the report generator were separate executables due to limited memory. In 1982, one released a system called GPSS/C, which was developed to be easily ported to any architecture, since the GPSS code was converted into P-Code and evaluated with an interpreter. The GPSS/C system was during the next decade enhanced and ported to over a dozen different machines. In 1983, the first GPSS on the PC, GPSSR/PC, was released. It was developed by B. Richards. Compared to GPSSR, it had added functionality, e.g. in the form of an interactive report generator. It had a total of 42 block types. (7 of these are not in any system in the Appendix.) Later some animation capabilities were added. in The 33rd Winter Simulation Conference 9-12 December 2001 Crystal Gateway Marriott, Arlington, VA view details |