![]() ![]() He changed focus in 2013 to develop a follow-on program called Toves, also open source on Sourceforge, but written in C#/Mono. Written in Java, it is open source and is available on Sourceforge. The next one is Logisim (note the missing ‘c’), developed by Prof Carl Burch in 2000 for his students at the College of St Benedict and St John’s University in Minnesota. Of all the simulators I found, this is the only one which contains a hidden pancake recipe. It is written in C and Tcl, last updated in 2016, and maintained by Jeffery Hansen here on Sourceforge. Next is TKGate, developed as a project by undergraduates in 1987 at the Carnegie Mellon University. As recent as 2008, one user was able to compile it using FreePascal. It is a text-based simulator, open source for personal and research use, and written in Pascal. ![]() Logicsim from 1983 is the oldest one on our list, developed by Wun Chin Kau and Douglas Jones in support of computer science lab classes at the University of Iowa Computer Science department. They are not doing SPICE-like analog analysis of transistor logic gates, but they’re still quite handy for proofing out designs. I’m focusing on plain logic simulators, analyzing ones and zeros using Boolean logic. So today, let’s take a quick survey of a few such simulators that I found. It made me want to take a fresh look on what’s out there and which features set the different simulators apart. The topic came up again in May when a repair video by featured one such simulator called Logisim-evolution. A few months ago, a tweet by asking about simple digital simulators caught my attention. ![]()
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