SigNet

--signet
--version 1.0a

local function version()
	return "1.0a"
end

local sigAvailable = tonumber("8000",16)
local sigAcknowledge = tonumber("4000",16)
local sigFilter = tonumber("2FFF",16)
local sides = {"top", "bottom", "left", "right", "front", "back"}

-- returns true if there is a valid signal coming in on side
local function available(side)
	return colors.test(redstone.getBundledInput(side), sigAvailable)
end

-- returns true if a tx'd sig has been acknowldged
local function acknowledged(side)
	return colors.test(redstone.getBundledInput(side), sigAcknowledge)
end

-- returns the first side with a valid signal
local function scan()
	for side in sides do
		if available(side) then
			return side
		end
	end
	return nil
end

-- removes overhead bits from the signal coming in on side
local function getSig(side)
	if not available(side) then
		return nil
	end
	return bit.band(redstone.getBundledInput(side), sigFilter)
end

function rx(side)
	if not available(side) then
		return nil
	end
	sig = getSig(side)
	redstone.setBundledOutput(side, sigAcknowledge)
	while available(side) do
		os.sleep(0.05)
	end
	redstone.setBundledOutput(side, 0)
	return sig
end

function tx(side, sig)
	redstone.setBundledOutput(side, sig + sigAvailable)
	while not colors.test(redstone.getBundled
	redstone.setBundledOutput(side, 0)
	signal.waitWhile(side, signal.commandReceived)
end