Use center square as output for block underneath

[lukescott]

You can power block on each side, but not the block the IC is sitting on. Perhaps you could use the center block as another input/output?

This mod has something similar, although they use variables to write code, not place blocks:

https://github.com/stfwi/redstonepen/tree/master/documentation/redstone-logic-control

They use U (Up) and D (Down) to represent the blocks above and below. IMO the block underneath is probably sufficient as it would allow for more compact redstone, allowing you the power the underside without external redstone.

[replaceitem]

That would certainly be useful, but could also interfere with circuits that don't use it and are centered