I built an eight-bit ripple-carry adder over the weekend and have just started the digging to take it up to sixteen bits.. I've seen a few theoretical designs for full adders on the wiki and such, but never a complete system.
See it in action here: http://mkv25.net/dfma/movie-1084-numberabbeydemonstration
Ok, there's a lot going on here.
In the southwest are the main controls for the adders. Each column is one bit, with the red and blue levers as inputs and the yellow gears showing the sums. Those gears are engaged and powered to indicate a '1' in the sum and disengaged for a '0'.
The hallway to the right of that contains the utility levers which control the power and water to different parts of the system. The yellow lever is linked to all of the sum gears and is only there to turn them all off to start with so that the pressure plates will turn them on again.
Farther to the east is the bottom of the main intake pump tower.
In the northwest are the water wheels and the drain. The drainage pump tower actually continues to the top of the water tower and pumps the used water back into the system, so water is only forced through the drain back into the stream when the adder's shut down and the water tower fills up.
Although the drainage tower is only one pump wide, its intake is constantly pressurized to 7s whenever water is flowing through the adders, so there is always enough water to keep things running. I've tested it with all outputs wide open; the more water flows through the system, the more water is forced into the drainage pumps and put back into the top.
The main intake pumps, by contrast, have to wait for the streamwater to come to them. They really just serve to start the system up and make sure evaporation is offset.
A ways over to the west is part of the shaft that dumps the water tower into the adder system. The next level down is where that water is distributed to the individual adders, and also where power is distributed to the sum-display gears.
To the southeast are the stockpiles which hold the pieces for adders when I'm expanding the system. They are presently empty, except for the stone piles used to build the drawbridges. - Kanddak
There are 11 comments for this map series, last post 2009-03-31
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