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Logisim is software for designing simple and advanced logic circuits such as RAMs, Registers, CPUs, etc.

2 votes
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How to pipeline CPU instructions in sequence?

Split it into 2x19 bits using a wiring splitter, then use a multiplexer to select the current part. You already know how to make a signal that changes on every clock cycle. So use that signal in a mul …
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6 votes
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Why is this NAND gate not turning on with both inputs off?

A blue wire in Logisim indicates a wire with nothing outputting a signal to it. … Logisim treats them as unused inputs (configurable in preferences), but if all of a gate's inputs are unused, you haven't wired it up properly and so it outputs a red error signal which propagates everywhere …
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