diff --git a/rtu/dev/redstone.lua b/rtu/dev/redstone.lua
new file mode 100644
index 0000000..0ec1283
--- /dev/null
+++ b/rtu/dev/redstone.lua
@@ -0,0 +1,88 @@
+-- #REQUIRES rtu.lua
+-- note: this RTU makes extensive use of the programming concept of closures
+
+function redstone_rtu()
+    local self = {
+        rtu = rtu_init()
+    }
+
+    local rtu_interface = function ()
+        return self.rtu
+    end
+
+    local link_di = function (side, color)
+        local f_read = nil
+
+        if color then
+            f_read = function ()
+                return rs.testBundledInput(side, color)
+            end
+        else
+            f_read = function ()
+                return rs.getInput(side)
+            end
+        end
+            
+        self.rtu.connect_di(f_read)
+    end
+
+    local link_do = function (side, color)
+        local f_read = nil
+        local f_write = nil
+
+        if color then
+            f_read = function ()
+                return colors.test(rs.getBundledOutput(side), color)
+            end
+
+            f_write = function (value)
+                local output = rs.getBundledOutput(side)
+
+                if value then
+                    colors.combine(output, value)
+                else
+                    colors.subtract(output, value)
+                end
+
+                rs.setBundledOutput(side, output)
+            end
+        else
+            f_read = function ()
+                return rs.getOutput(side)
+            end
+
+            f_write = function (value)
+                rs.setOutput(side, color)
+            end
+        end
+            
+        self.rtu.connect_coil(f_read, f_write)
+    end
+
+    local link_ai = function (side)
+        self.rtu.connect_input_reg(
+            function ()
+                return rs.getAnalogInput(side)
+            end
+        )
+    end
+
+    local link_ao = function (side)
+        self.rtu.connect_holding_reg(
+            function ()
+                return rs.getAnalogOutput(side)
+            end,
+            function (value)
+                rs.setAnalogOutput(side, value)
+            end
+        )
+    end
+
+    return {
+        rtu_interface = rtu_interface,
+        link_di = link_di,
+        link_do = link_do,
+        link_ai = link_ai,
+        link_ao = link_ao
+    }
+end
diff --git a/scada-common/rsio.lua b/scada-common/rsio.lua
new file mode 100644
index 0000000..ebc91f4
--- /dev/null
+++ b/scada-common/rsio.lua
@@ -0,0 +1,37 @@
+RS_IO = {
+    -- digital inputs --
+
+    -- facility
+    F_SCRAM,    -- active high, facility-wide scram
+    F_AE2_LIVE, -- active high, indicates whether AE2 network is online (hint: use redstone P2P)
+
+    -- reactor
+    R_SCRAM,    -- active high, reactor scram
+    R_ENABLE,   -- active high, reactor enable
+
+    -- digital outputs --
+
+    -- waste
+    WASTE_PO,   -- active low, polonium routing
+    WASTE_PU,   -- active low, plutonium routing
+    WASTE_AM,   -- active low, antimatter routing
+
+    -- reactor
+    R_SCRAMMED,     -- if the reactor is scrammed
+    R_AUTO_SCRAM,   -- if the reactor was automatically scrammed
+    R_ACTIVE,       -- if the reactor is active
+    R_AUTO_CTRL,    -- if the reactor burn rate is automatic
+    R_DMG_CRIT,     -- if the reactor damage is critical
+    R_HIGH_TEMP,    -- if the reactor is at a high temperature
+    R_NO_COOLANT,   -- if the reactor has no coolant
+    R_EXCESS_HC,    -- if the reactor has excess heated coolant
+    R_EXCESS_WS,    -- if the reactor has excess waste
+    R_INSUFF_FUEL,  -- if the reactor has insufficent fuel
+    R_PLC_TIMEOUT,  -- if the reactor PLC has not been heard from
+
+    -- analog outputs --
+
+    A_R_BURN_RATE,  -- reactor burn rate percentage
+    A_B_BOIL_RATE,  -- boiler boil rate percentage
+    A_T_FLOW_RATE   -- turbine flow rate percentage
+}