Hi there. I am working on my capstone. We have created an up/down counter to attach to a sensor so as to count cars going into and out of a parking garage. While our circuit is working, I would however like the count up to stop at 120, and the count down to stop at 000. I would also like the reset button to reset to 120, if it is possible. Right now when it comes on in multisim, it starts the count at 999 and can roll up or down past 000/999. I have no idea how to successfully modulate the 74192 IC's. Any suggestions would be greatly appreciated. Here is a copy of my multisim circuit:
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