Sorry for the scare! Clearly I need more sleep... thanks! Looking forward to the next update then. Any comments on future 74HC additions? I've been following Dr Matt Regan's CPU design series: https://www.youtube.com/watch?v=Rj5lK06d8ug He additionally uses these components: 74HC20 74HC27 74HC30 74HC42 74HC165 74HC193 74HC244 74HC374 74HC393

Perhaps the author would consider opening up just enough that the community can contribute the code to add elements to the parts catalog, as that seems the most critical.