I would like one of my keyboards to send normal keys, and the other to run macros when I press a key on that. Is this possible?
Do you really need two keyboards? If you always have your Num-Lock key either on or off, you can do what you want with just a single keyboard... This method may(?) work with two keyboards if you prefer. Using a single keyboard may be faster than having to move you hand(s) from one keyboard to the other.
You can use
Lets assume that in your normal typing mode you have Num-Lock on... When you turn Num-Lock off, every key is seen differently by
To do this, using a single keyboard, I need to press three keys
Aside from the Numeric-keypad keys, the other keys function normally whether Numlock is on or off. So if you don't typically use the keypad at all, then it may be enough to use