add io brick, misc fixes

bricks/inputs/iobrick-update.lua

@@ -0,0 +1,49 @@
+
+local function outputByte(gate, v)
+	local p = 256
+	for i = 1, 8 do
+		p = p/2
+		local port = 17 - i
+		if v>=p then
+			v = v - p
+			Gate.setportstate(gate, port, 1)
+		else
+			Gate.setportstate(gate, port, 0)
+		end
+	end
+end
+local function inputByte(gate)
+	local v = 0
+	local p = 256
+	for i = 1, 8 do
+		p = p/2
+		local port = 9 - i
+		v = v + p*Gate.getportstate(gate, port)
+	end
+	return v
+end
+
+return function(gate)
+	-- input
+	if #gate.queueIn > 0 and gate.outputToggle then
+	--if #gate.queueIn > 0 then
+		local v = table.remove(gate.queueIn, #gate.queueIn)
+		outputByte(gate, v)
+		Gate.setportstate(gate, 18, 1)
+		gate.outputToggle = false
+		Gate.queue(gate, 1)
+	else
+		outputByte(gate, 0)
+		Gate.setportstate(gate, 18, 0)
+		gate.outputToggle = true
+		if #gate.queueIn > 0 then
+			Gate.queue(gate, 1)
+		end
+	end
+	
+	-- output
+	if Gate.getportisrising(gate, 17) then
+		local v = inputByte(gate)
+		Gate.cbQueue(gate, string.format("%02X", v), 1024)
+	end
+end