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Issue No.01 - January/February (1991 vol.11)
pp: 26-29
<p>A system that allows students to simulate an validate a process plant of their own design, associate I/O channels to the individual components of it, and write a control or sequencer program to control the plant operation using any given assembler is described. Instructors can add a control section to the system that will produce random faults, power failures, and input/output errors in a simulation. With this capability, instructors can test a student's design for completeness, error handling, and fail-safe operation. Some self-correcting faults simulate a repair; the control program restarts as and when appropriate, while other conditions must close the plant down. In the graphics mode of operation the plant design appears as a cartoon with fluid levels altering, pumps switching on and off, and so on, according to the control effected by the student program. The system also displays a trace of the execution and I/O status of the program under execution. If no process design is included, the system can be used to run simple assembler programs on a stand-alone basis. The system was written in response to a need for a teaching tool usable in graduate-level real-time, real-world computing courses.</p>
David W. Russell, Kirtley B. Haden, "A Configurable, Virtual Microprocessor System for Instructional Use in Real-Time, Real-World Studies", IEEE Micro, vol.11, no. 1, pp. 26-29, January/February 1991, doi:10.1109/40.67742
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