it is fully expandable.
how to operate:
each button is 1 and if you press 1 button it just means 1. if you press 2 buttons it means 1+1 and if you press 3 buttons it means 1+1+1
there are cubes on the left to press multiple buttons.
screenie!
this is the tidierer version
open spoiler below to see how to operate and old version
just make another full adder next to it and instead of the carryout being a display link it up to the carry in of the second one instead of a button (all labled)
also labled all the gates if anyone is intrested.
download:
https://dl.dropboxusercontent.com/u/872 ... 0adder.zip
NEXT STEP:
- MAKE IT NEATER AND NO LATENCY
- expand it and make a 7 segment display with rom instead of binary output
- make proper input (dunno the best way really)
- make it into a full 8 bit alu and make a cpu as well (would be pretty slow. only way i can think of making a clock is a goomba stepping on a button then off it.)