fn wiring(scale: &Scale) -> Vec<(PinId, PinId, &'static str)>Expand description
Every wire, as the pins it joins. The scheme leaves no pin dangling:
in_i→ block(i,0).b0 and block((i+1)%N,0).b1 (column-0 inputs)- block.s → right neighbour’s b0 and b1 (horizontal chain)
- last col s →
out_i(sheet outputs) - block.c → block-below.b1 (wrapping) (vertical carry)