What kind of logic gate / memory cell set up can override one output with another?
I'm trying to set up a rail system with redstone but can't set specific destinations without a way to override or reset the whole system.
If you're using RS Nor latches/flip-flops, then simply having one signal get sent to every R input would reset the system.
Otherwise, an override switch is also pretty easy to use. You'd just use simple logic gates for that.
Input-that-is-false-if-override-is-on : Regular-Input AND not(override)
Input-that-is-true-if-override-is-on : Regular-Input OR override
So basically, i have tracks going in 3 directions with one junction controlled by redstone (shared by two switches in different locations. My problem is that if I have one switch on, there is always power in the junction so it doesnt matter if the second switch is on or off, I end up in the same destination. I just want a way to reset the system so that i don't have to walk all the way back to the first switch to turn it off in order to utilize the second switch.
I've also seen systems where the destination is stored using a button, but I don't know how to do that. Are memory cells used?
By using this schematic, flipping a switch (or a series of switches) causes the destination of the cart (very simply because each state of the lever has its own destination [but sometimes, combos are necessary, like in my schematic]). Additionally, the destination stays, so your return also takes you directly to your base.
If you were looking for a full-over-ride, I don't know how to make a reset button.