Register Machine (RAM)
![Register Machine (RAM)](RAM_Instructions.png)
As a theoretical model of a computer, the register machine is a Turing complete model, thus an alternative to the Turing-machine. It accepts programs in a form similar to assemble code and executes them.
Since this is implemented in JavaScript you can try writing programs yourself and test them directly in your browser!
The Wikipedia article below explains the inputs and the theory behind the model.