I remember learning in school about how ROM chips are created. They start out with a uniform grid of wires with fuses at each intersection. Then, depending on how they want the chip to compute incoming data, they blow certain fuses while keeping other fuses intact. Signals cannot pass by the blown fuses making for only certain pathways that lead to the output lines.

 

Does anyone know of any online ROM ship simulators? Something that lets the user manually blow the fuses and set the input and then see what kind of output results?

hmm...most of the time you send a PLA or PROM data to the manufacture and they do it there. THere is hardware you can buy that allows you to do this...but I do not recall what the names of the manufactures are...

 

You can download Logicworks which is a digital logic/circuit simulator(software) that is used in many intro to digital logic classes. There you can do anything you can do what u want