Comment by 6510

I haven't build it because it costs a bit to much for my budget but someone some day should build the megalithic computer according to my vision: We take a river flowing down a mountain in a suitable location and carve out square canals. The AND gate is done by having a giant door attached to two blocks hollowed out from the bottom. If both blocks are submerged in water together they lift the door and water may flow into the rest of the circuitry. A grid of basins functions as the display and to store values. The input is done by putting weights onto the floating blocks thereby preventing them from lifting specific doors. I doubt it can be made large enough to run doom but it doesn't hurt to be ambitious.