execution. See also Little man computer (another instructional model) WDR paper computer External links a discussion of the CARDIAC with examples and a simulator in JavaScript an interpreter and interactive debugger on the .NET platform on GitHub cinc/jcinc – a simulator for the Java platform with both command-line and GUI interfaces on SourceForge Software Emulator for the CARDIAC – hosted on Macintosh, Windows (untested), and Linux (untested); provides editor, simple assembler, and examples; opcodes 0 and 9 are interchanged as described on the page; source code appears to be proprietary; free downloads Quick Tour of the Built CARDIAC computer on YouTube CPU Design on Paper – Al Williams' spreadsheet version of CARDIAC on the Dr. Dobb's site Paper to FPGA – Al Williams' FPGA implementation of CARDIAC on an FPGA board (final article of a series on Dr. Dobb's web site) Models of computation