@Override
    public void readDesc(MCDataInput in) {
        super.readDesc(in);
        gateState = in.readByte();
    }
Mapped inputs and outputs of the gate.
OOOO IIII
High nybble is output.
Low nybble is input
fabrication/src/main/java/mrtjp/projectred/fabrication/engine/gates/RedstoneGateTile.java