They're in-game inspired diagrams. The key is in the paragraph above the start of the 'Unclocked Logic' section.
A
→o * o→M O
o * o
B
The mechanical power goes in the first →, and the [M O] part is the output. A and B are the AND inputs. Gearboxes actually look like *, but o is also being used for gearboxes, albeit gearboxes that are just there to drain power.
Comments
They're in-game inspired diagrams. The key is in the paragraph above the start of the 'Unclocked Logic' section.
The mechanical power goes in the first →, and the [M O] part is the output. A and B are the AND inputs. Gearboxes actually look like *, but o is also being used for gearboxes, albeit gearboxes that are just there to drain power.