diff --git a/sim/compile.lua b/sim/compile.lua
index db4930e..b69d83a 100644
--- a/sim/compile.lua
+++ b/sim/compile.lua
@@ -3,47 +3,122 @@ local ffi = FFI or require("ffi")
 Simulation = Simulation or {}
 
 ffi.cdef[[
-	
+	struct Net {
+		int in_queue;
+		int num_out_ports_on;
+		int state;
+		int update_tick;
+		struct Gate* gates_update[0];
+	};
+	struct OutPort {
+		struct Net* net;
+		int state;
+	};
+	struct Gate {
+		int in_queue;
+		struct OutPort out_ports[0];
+	};
 ]]
 
+function Simulation.compile_code(sim, text)
+	-- todo: compile some kind of DSL into machine code
+	
+	return code, size
+end
+
+local net_program_code = Simulation.compile_code( [[
+	
+]] )
+
 function Simulation.compile(sim)
+	sim.compilation = {
+		gates = {},
+		wires = {},
+		cgates = {},
+		cwires = {},
+	}
+	local comp = sim.compilation
+	
 	-- assemble a list of all nets
-	local all_nets = {}
 	local all_nets_t = {}
 	for k, wire in pairs(sim.wires) do
 		local net = Wire.getgroup(wire)
 		all_nets_t[net] = net
 	end
-	local num_nets = 0
+	local all_nets = {}
 	for net_id, net in pairs(all_nets_t) do
-		table.insert(all_nets, net)
+		table.insert(comp.nets, net)
+		local cdata = ffi.new("char["..(ffi.sizeof("struct Net") + ffi.sizeof("struct Gate*")*net.num_gates_update).."]")
+		local cnet = ffi.cast(cdata, "struct Net")
+		comp.cnets[net] = cnet
 	end
 	
 	-- assemble a list of all gates
 	local all_gates = {}
 	for k, gate in pairs(sim.gates) do
-		table.insert(all_gates, gate)
+		table.insert(comp.gates, gate)
+		local cdata = ffi.new("char["..(ffi.sizeof("struct Gate") + ffi.sizeof("struct OutPort")*gate.num_ports_out).."]")
+		local cgate = ffi.cast(cdata, "struct Gate")
+		comp.cgates[gate] = cgate
 	end
 	
-	-- construct each gate into an array
-	
-	-- construct array of all nets
-	local c_nets = ffi.new("struct Net["..(#all_nets).."]")
-	for net_idx, net in ipairs(all_nets) do
-		local c_net = ffi.new("struct Net", #net.gates_update)
-		
-		for gate_idx, gate in ipairs(net.gates_update) do
-			
+	for netidx, net in ipairs(comp.nets) do
+		local cnet = comp.cnets[net] or error("no cnet")
+		cnet.in_queue = net.in_queue
+		cnet.num_out_ports_on = net.state_num
+		cnet.state = net.state
+		cnet.update_tick = net.update_tick
+		for i = 1, net.num_gates_update do
+			local gate = net.gates_update[i]
+			local cgate = comp.cgates[gate] or error("no cgate")
+			cnet.gates_update[i-1] = cgate
+		end
+	end
+	
+	for gateidx, gate in ipairs(comp.gates) do
+		local cgate = comp.cgates[gate] or error("no cgate")
+		cgate.in_queue = gate.in_queue
+		local j = 0
+		for i, port in ipairs(gate.ports) do
+			if port.type == PortTypes.output then
+				local net = port.group
+				if net then
+					local cnet = comp.cnets[net] or error("no cnet")
+					cgate.out_ports[j].net = cnet
+				else
+					cgate.out_ports[j].net = 0
+				end
+				cgate.out_ports[j].state = gate.port_states[i] or error("no gate port_state")
+				j = j + 1
+			end
 		end
-		
-		c_nets[net_idx] = c_net
 	end
 end
 
 function Simulation.decompile(sim)
+	local comp = sim.compilation
 	
+	for netidx, net in ipairs(comp.nets) do
+		local cnet = comp.cnets[net] or error("no cnet")
+		net.in_queue = cnet.in_queue
+		net.state_num = cnet.num_out_ports_on
+		net.state = cnet.state
+		net.update_tick = cnet.update_tick
+	end
+	
+	for gateidx, gate in ipairs(comp.gates) do
+		local cgate = comp.cgates[gate] or error("no cgate")
+		gate.in_queue = cgate.in_queue
+		local j = 0
+		for i, port in ipairs(gate.ports) do
+			if port.type == PortTypes.output then
+				gate.port_states[i] = cgate.out_ports[j].state
+				j = j + 1
+			end
+		end
+	end
 end
 
-function Simulation.tick_compiled(sim)
+function Simulation.tick_compiled(sim, count)
 	
 end
diff --git a/sim/compiled_sim.bat b/sim/compiled_sim.bat
new file mode 100644
index 0000000..576c50a
--- /dev/null
+++ b/sim/compiled_sim.bat
@@ -0,0 +1,2 @@
+gcc compiled_sim.c -shared -o compiled_sim.dll -Wall -Werror
+pause
diff --git a/sim/compiled_sim.c b/sim/compiled_sim.c
index 442f766..da809c4 100644
--- a/sim/compiled_sim.c
+++ b/sim/compiled_sim.c
@@ -1,7 +1,75 @@
 
 void sim_init(int num_gates, int num_nets);
-void sim_add_gate();
-void sim_add_net();
-void sim_tick();
-void sim_get_net_state(int objref);
-void sim_get_port_state(int objref, int index);
+void sim_add_gate(int gateid, int logic_func_id, char* logic_func_name, int num_out_ports, char* data);
+void sim_add_net(int netid, int num_gates_update);
+void sim_connect_out_port(int gateid, int index, int netid);
+void sim_connect_in_port(int gateid, int index, int netid);
+void sim_tick(int count);
+void sim_get_net_state(int netid);
+void sim_get_port_state(int gateid, int index);
+void sim_set_net_state(int netid);
+void sim_set_port_state(int gateid, int index);
+void sim_delete_net(int netid);
+void sim_delete_gate(int gateid);
+
+////////
+
+void sim_create(unsigned int datalen, char* text);
+
+#include <stdlib.h>
+#include <assert.h>
+
+typedef unsigned int uint;
+typedef unsigned long long u64;
+
+void sim_copy_logic_function(
+	char** prog,
+	char* in_queue,
+	char* out_port_states,
+	int logic_func,
+	char** port_in_net_states,
+	char** port_out_net_inqueue,
+	char** port_out_net_update_func,
+	int num_ports_in,
+	int num_ports_out
+) {
+	// todo: indata = inport net state pointers, outport net in queue pointers, outport net update function pointers
+}
+
+void sim_compile_gate(char** prog, char** data, int** idat, u64* indata) {
+	int num_ports_in  = *(indata++);
+	int num_ports_out = *(indata++);
+	int in_queue      = *(indata++);
+	int logic_func    = *(indata++);
+	
+	char* port_in_net_states[256];
+	sim_copy_logic_function( // copy logic function into program
+		prog,
+		*data,
+		(*data)+1,
+		logic_func,
+		&indata,
+		num_ports_in,
+		num_ports_out
+	);
+	
+	*(*data++) = in_queue; // alloc bool for in queue
+	for(int i=0; i<num_ports_out; i++) { // alloc bool for each output state
+		*((*data)++) = *(indata++);
+	}
+}
+
+void sim_compile_net_function(char** prog, char* in_queue, int* gates, u64** indata, int num_gates_update) {
+	
+}
+
+void sim_compile_net(char** prog, char** data, int** idat, u64* indata) {
+	int num_gates_update = *(indata++);
+	int num_ports_on     = *(indata++);
+	int in_queue         = *(indata++);
+	
+	sim_compile_net_function(prog, *data, *idat, &indata, num_gates_update);
+	
+	*((*data)++) = in_queue;
+	*((*idat)++) = num_ports_on;
+}
diff --git a/sim/compiled_sim.dll b/sim/compiled_sim.dll
new file mode 100644
index 0000000..7a56233
Binary files /dev/null and b/sim/compiled_sim.dll differ
diff --git a/sim/gate.lua b/sim/gate.lua
index 25d7821..6d7efb8 100644
--- a/sim/gate.lua
+++ b/sim/gate.lua
@@ -1,39 +1,48 @@
 
-local ffi = FFI
+local ffi = FFI or require("ffi")
 
 Gate = {}
 
+ffi.cdef [[
+	struct OutPort {
+		struct Net* net;
+		int state;
+	};
+	struct Gate {
+		int in_queue;
+		struct OutPort ports[0];
+	};
+]]
+
 function Gate.new(objref, definition)
-	local o = {
+	local gate = {
 		-- Logic Critical
-		in_queue = 0,
+		c = nil,
 		logic = definition.logic,
 		ports = {},
 		port_nets = {},
-		port_states = {},
 		
 		objref = objref,
 		definition = definition,
 	}
-	return o
+	local cdata = ffi.new("char["..(ffi.sizeof("struct Gate") + ffi.sizeof("struct OutPort")*(#gate.ports+1)).."]")
+	gate.c = ffi.cast("struct Gate*", cdata)
+	gate.c.in_queue = 0
+	Gate.update_c_ports(gate)
+	return gate
 end
 
 -- Logic Critical
 function Gate.getportstate(gate, index)
-	--return gate[index*2].state
-	return gate.port_nets[index].state
+	return gate.c.ports[index].state
 end
 
 -- Logic Critical
 function Gate.setportstate(gate, index, state)
-	--if state ~= gate[index*2+1] then
-	if state ~= gate.port_states[index] then
-		--local group = gate[index*2]
+	if state ~= gate.c.ports[index].state then
 		local group = gate.port_nets[index]
-		--group.state_num = group.state_num - gate[index*2+1] + state
-		group.state_num = group.state_num - gate.port_states[index] + state
-		--gate[index*2+1] = state
-		gate.port_states[index] = state
+		group.state_num = group.state_num - gate.c.ports[index].state + state
+		gate.c.ports[index].state = state
 		
 		if ((group.state_num>0) ~= (group.state==1)) and (group.in_queue==0) then
 			Simulation.queuegroup(GSim, group)
@@ -41,6 +50,11 @@ function Gate.setportstate(gate, index, state)
 	end
 end
 
+-- Logic Critical
+function Gate.logic(gate)
+	gate.logic(gate)
+end
+
 function Gate.preinit(gate)
 	
 end
@@ -83,10 +97,6 @@ function Gate.init(gate)
 	Gate.getdefinition(gate).init(gate)
 end
 
-function Gate.logic(gate)
-	gate.logic(gate)
-end
-
 function Gate.input(gate, argv)
 	Gate.getdefinition(gate).input(gate, argv)
 end
diff --git a/sim/gatedef.lua b/sim/gatedef.lua
index f14cb7b..c8a9bde 100644
--- a/sim/gatedef.lua
+++ b/sim/gatedef.lua
@@ -5,7 +5,7 @@ GateDefinition = {
 	input = function(gate, argv) end
 }
 
-function GateDefinition.new(objref, name, description, init, logic, input, global, ports)
+function GateDefinition.new(objref, name, description, init, logic, input, code, global, ports, code)
 	
 	name = collapseescape(name)
 	init  = collapseescape(init)
@@ -13,17 +13,24 @@ function GateDefinition.new(objref, name, description, init, logic, input, globa
 	input = collapseescape(input)
 	global = collapseescape(global)
 	description = collapseescape(description)
+	code = collapseescape(code)
 	
-	local o = {
+	local compiled_size, compiled_code = Simulation.compile_code(nil, code)
+	
+	local def = {
 		objref = objref,
 		name = name,
 		description = description,
-		ports = ports or {}
+		ports = ports or {},
+		num_in_ports = 0,
+		num_out_ports = 0,
+		compiled_program_code = compiled_code,
+		compiled_program_size = compiled_size,
 	}
 	
 	local initfunc = loadstring(tostring(init))
 	if initfunc~=nil then
-		o.init = initfunc() or function()end
+		def.init = initfunc() or function()end
 	else
 		print("Error loading init func for ".. (name or ""))
 		print(init)
@@ -31,7 +38,7 @@ function GateDefinition.new(objref, name, description, init, logic, input, globa
 	
 	local logicfunc = loadstring(tostring(logic))
 	if logicfunc ~= nil then
-		o.logic = logicfunc() or function()end
+		def.logic = logicfunc() or function()end
 	else
 		print("Error loading logic function for " .. (name or ""))
 		print(logic)
@@ -39,7 +46,7 @@ function GateDefinition.new(objref, name, description, init, logic, input, globa
 	
 	local inputfunc = loadstring(tostring(input))
 	if inputfunc ~= nil then
-		o.input = inputfunc() or function()end
+		def.input = inputfunc() or function()end
 	else
 		print("Error loading input function for " .. (name or ""))
 		print(input)
@@ -53,7 +60,16 @@ function GateDefinition.new(objref, name, description, init, logic, input, globa
 		print(global)
 	end
 	
-	return o
+	for i = 1, #def.ports do
+		local portd = def.ports[i]
+		if portd.type==PortTypes.output then
+			def.num_out_ports = def.num_out_ports + 1
+		elseif portd.type==PortTypes.input then
+			def.num_in_ports = def.num_in_ports + 1
+		else error("invalid port type: "..name.." port "..i..) end
+	end
+	
+	return def
 end
 
 function GateDefinition.constructgate(def, objref, position, rotation)
@@ -85,10 +101,8 @@ function GateDefinition.constructgate(def, objref, position, rotation)
 		local port = Port.new(type, dir, {position[1]+pos[1], position[2]+pos[2], position[3]+pos[3]}, portd.causeupdate, i, gate)
 		
 		gate.ports[port.idx] = port
-		--gate[port.idx*2] = nil
-		--gate[port.idx*2+1] = 0
 		gate.port_nets[port.idx] = nil
-		gate.port_states[port.idx] = 0
+		gate.c.ports[port.idx].state = 0
 	end
 	
 	return gate
diff --git a/sim/group.lua b/sim/group.lua
index 675c626..629d2d6 100644
--- a/sim/group.lua
+++ b/sim/group.lua
@@ -185,7 +185,7 @@ function Group.setstate(group, state)
 		local len = group.num_gates_update
 		for i = 1, len do
 			local gate = group.gates_update[i]
-			if gate and gate.in_queue==0 then
+			if gate and gate.c.in_queue==0 then
 				Simulation.queuegate(sim, gate)
 			end
 		end
diff --git a/sim/network.lua b/sim/network.lua
index f40194f..d99f819 100644
--- a/sim/network.lua
+++ b/sim/network.lua
@@ -76,10 +76,11 @@ function network_update()
 				local logic = data[i+5]
 				local input = data[i+6]
 				local global = data[i+7]
-				local numports = tonumber(data[i+8])
+				local code = data[i+8]
+				local numports = tonumber(data[i+9])
 				local ports = {}
 				
-				for a = i+9, numports*5+i+8, 5 do
+				for a = i+10, numports*5+i+9, 5 do
 					local portd = {
 						type = tonumber(data[a]),
 						position = vectotable(data[a+1]),
@@ -92,10 +93,10 @@ function network_update()
 					if not portd.direction then print(line) end
 				end
 				
-				local definition = GateDefinition.new(objref, name, desc, init, logic, input, global, ports)
+				local definition = GateDefinition.new(objref, name, desc, init, logic, input, global, ports, code)
 				Simulation.addgatedefinition(sim, definition)
 				
-				i = i + 8 + numports*5
+				i = i + 9 + numports*5
 			elseif data[i] == "SL" then
 				local wire = Simulation.getwirebyref(sim, tonumber(data[i+1]))
 				if wire ~= nil then
diff --git a/sim/port.lua b/sim/port.lua
index 305c80a..5a92e25 100644
--- a/sim/port.lua
+++ b/sim/port.lua
@@ -62,5 +62,5 @@ function Port.gettype(port)
 end
 
 function Port.getstate(port)
-	return Port.getgate(port).port_states[port.idx]
+	return Port.getgate(port).c.ports[port.idx].state
 end
diff --git a/sim/simulation.lua b/sim/simulation.lua
index 010a8f6..f4ab6f8 100644
--- a/sim/simulation.lua
+++ b/sim/simulation.lua
@@ -244,11 +244,11 @@ end
 function Simulation.queuegate(sim, gate)
 	sim.gatequeue[sim.num_gatequeue+1] = gate
 	sim.num_gatequeue = sim.num_gatequeue + 1
-	gate.in_queue = 1
+	gate.c.in_queue = 1
 end
 
 function Simulation.queuegate_safe(sim, gate)
-	if gate.in_queue==0 then
+	if gate.c.in_queue==0 then
 		Simulation.queuegate(sim, gate)
 	end
 end
@@ -296,10 +296,10 @@ function Simulation.dequeuegroup(sim, group)
 end
 
 function Simulation.dequeuegate(sim, gate)
-	if gate.in_queue~=0 then
+	if gate.c.in_queue~=0 then
 		array_remove(sim.gatequeue, gate, true)
 		sim.num_gatequeue = sim.num_gatequeue - 1
-		gate.in_queue = 0
+		gate.c.in_queue = 0
 	end
 	if sim.inputqueue~=nil then sim.inputqueue[gate] = nil end
 	if sim.initqueue ~=nil then sim.initqueue [gate] = nil end
@@ -330,7 +330,7 @@ function Simulation.ticklogic(sim)
 	
 	if sim.tickqueue[sim.current_tick] ~= nil then
 		for i, gate in pairs(sim.tickqueue[sim.current_tick]) do
-			if gate.in_queue==0 then
+			if gate.c.in_queue==0 then
 				Simulation.queuegate(sim, gate)
 			end
 		end
@@ -340,7 +340,7 @@ function Simulation.ticklogic(sim)
 	for i = 1, sim.num_gatequeue do
 		local gate = sim.gatequeue[i]
 		gate.logic(gate)
-		gate.in_queue = 0
+		gate.c.in_queue = 0
 		sim.gatequeue[i] = nil
 	end
 	--sim.gatequeue = {}