One gate, unlimited possibilities
NAND is the only logic element in the game. NOT, AND, OR, XOR, latches, decoders, RAM, CPU: you build all of it from scratch.
Built for enormous circuits
Worlds with millions of gates stay playable. Enough to make a 16-bit computer and run your own 24-kilobyte full-scale operating system on it at 1000 ticks per second.
Tutorial challenges
As an alternative to the sandbox, you can work through challenges on how NAND can be used to make latches, flip-flops, adders, counters, RAM and program memory, step by step, all the way up to a working processor.
Scale logic in seconds
Any fragment can be copied and pasted. Wires autoconnect, so scaling one component to thousands takes seconds.
Library of blocks
Commonly used fragments can be turned into blocks that can be easily accessed, modified in a single place, or nested.
A simulation that behaves like real hardware
There is no artificial per-gate delay: within a single tick, any change propagates through the whole device, just as a real circuit settles between clock edges. Nothing is time-synchronized for you: when you need it, you build the clock and the flip-flops yourself.
Program your machine
Write a whole ROM in a binary or hex editor and flash it into your circuit in one go.
Co-op
Invite Steam friends or host on a local network and build together. Each player runs their own simulation, so you can test your part of the machine while a friend is still wiring and debugging theirs.
