diff --git a/src/component.c b/src/component.c
index 05f5f79..8c45753 100644
--- a/src/component.c
+++ b/src/component.c
@@ -71,6 +71,10 @@ nn_componentTable *nn_getComponentTable(nn_component *component) {
     return component->table;
 }
 
+const char *nn_getComponentType(nn_componentTable *table) {
+    return table->name;
+}
+
 void *nn_getComponentUserdata(nn_component *component) {
     return component->statePtr;
 }
diff --git a/src/computer.c b/src/computer.c
index d3c8457..5d212f5 100644
--- a/src/computer.c
+++ b/src/computer.c
@@ -41,6 +41,9 @@ nn_computer *nn_newComputer(nn_universe *universe, nn_address address, nn_archit
     c->userdata = userdata;
     c->memoryTotal = memoryLimit;
     c->tmpAddress = NULL;
+    c->temperature = 30;
+    c->roomTemperature = 30;
+    c->temperatureCoefficient = 1;
 
     // Setup Architecture
     c->archState = c->arch->setup(c, c->arch->userdata);
@@ -242,6 +245,46 @@ void nn_addEnergy(nn_computer *computer, size_t amount) {
     computer->energy += amount;
 }
 
+double nn_getTemperature(nn_computer *computer) {
+    return computer->temperature;
+}
+
+double nn_getThermalCoefficient(nn_computer *computer) {
+    return computer->temperatureCoefficient;
+}
+
+double nn_getRoomTemperature(nn_computer *computer) {
+    return computer->roomTemperature;
+}
+
+void nn_setTemperature(nn_computer *computer, double temperature) {
+    computer->temperature = temperature;
+    if(computer->temperature < computer->roomTemperature) computer->temperature = computer->roomTemperature;
+}
+
+void nn_setTemperatureCoefficient(nn_computer *computer, double coefficient) {
+    computer->temperatureCoefficient = coefficient;
+}
+
+void nn_setRoomTemperature(nn_computer *computer, double roomTemperature) {
+    computer->roomTemperature = roomTemperature;
+    if(computer->temperature < computer->roomTemperature) computer->temperature = computer->roomTemperature;
+}
+
+void nn_addHeat(nn_computer *computer, double heat) {
+    computer->temperature += heat * computer->temperatureCoefficient;
+    if(computer->temperature < computer->roomTemperature) computer->temperature = computer->roomTemperature;
+}
+
+void nn_removeHeat(nn_computer *computer, double heat) {
+    computer->temperature -= heat * computer->temperatureCoefficient;
+    if(computer->temperature < computer->roomTemperature) computer->temperature = computer->roomTemperature;
+}
+
+bool nn_isOverheating(nn_computer *computer) {
+    return computer->temperature > NN_OVERHEAT_MIN;
+}
+
 const char *nn_getError(nn_computer *computer) {
     return computer->err;
 }
@@ -272,7 +315,32 @@ void nn_setCError(nn_computer *computer, const char *err) {
     computer->allocatedError = false;
 }
 
-nn_component *nn_newComponent(nn_computer *computer, nn_address address, int slot, nn_componentTable *table, void *userdata);
+nn_component *nn_newComponent(nn_computer *computer, nn_address address, int slot, nn_componentTable *table, void *userdata) {
+    nn_component *c = NULL;
+    for(size_t i = 0; i < computer->componentLen; i++) {
+        if(computer->components[i].address == NULL) {
+            c = computer->components + i;
+            break;
+        }
+    }
+    if(c == NULL) {
+        if(computer->componentLen == computer->componentCap) return NULL; // too many
+        c = computer->components + computer->componentLen;
+        computer->componentLen++;
+    }
+
+    c->address = nn_strdup(address);
+    if(c->address == NULL) return NULL;
+    c->table = table;
+    c->slot = slot;
+    c->computer = computer;
+    if(table->constructor == NULL) {
+        c->statePtr = NULL;
+    } else {
+        c->statePtr = table->constructor(table->userdata);
+    }
+    return c;
+}
 
 void nn_removeComponent(nn_computer *computer, nn_address address) {
     for(size_t i = 0; i < computer->componentLen; i++) {
@@ -299,6 +367,21 @@ nn_component *nn_findComponent(nn_computer *computer, nn_address address) {
     return NULL;
 }
 
+nn_component **nn_listComponent(nn_computer *computer, size_t *len) {
+    nn_component **c = nn_malloc(sizeof(nn_component *) * computer->componentLen);
+    if(c == NULL) return NULL;
+    size_t j = 0;
+    for(size_t i = 0; i < computer->componentLen; i++) {
+        nn_component *component = computer->components + i;
+        if(component->address != NULL) {
+            c[j] = component;
+            j++;
+        }
+    }
+    *len = j;
+    return c;
+}
+
 void nn_resetCall(nn_computer *computer) {
     for(size_t i = 0; i < computer->argc; i++) {
         nn_values_drop(computer->args[i]);
diff --git a/src/computer.h b/src/computer.h
index a9322e4..1e4ed8b 100644
--- a/src/computer.h
+++ b/src/computer.h
@@ -37,6 +37,9 @@ typedef struct nn_computer {
     size_t memoryTotal;
     nn_address address;
     nn_address tmpAddress;
+    double temperature;
+    double temperatureCoefficient;
+    double roomTemperature;
 } nn_computer;
 
 #endif
diff --git a/src/emulator.c b/src/emulator.c
index c4e5e78..5fbcdff 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -1,8 +1,18 @@
 #include <assert.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include "neonucleus.h"
 #include "testLuaArch.h"
 
+void emulator_debugPrint(void *componentUserdata, void *methodUserdata, nn_component *component, nn_computer *computer) {
+    nn_value msg = nn_getArgument(computer, 0);
+    const char *m = nn_toCString(msg);
+    printf("[DEBUG] %s\n", m);
+    nn_return(computer, nn_values_cstring(m));
+    nn_return(computer, nn_values_cstring(m));
+    nn_return(computer, nn_values_cstring(m));
+}
+
 int main() {
     printf("Setting up universe\n");
     nn_universe *universe = nn_newUniverse();
@@ -14,7 +24,23 @@ int main() {
     nn_computer *computer = nn_newComputer(universe, "testMachine", arch, NULL, 1*1024*1024, 16);
     nn_setEnergyInfo(computer, 5000, 5000);
     nn_addSupportedArchitecture(computer, arch);
+
+    nn_componentTable *t = nn_newComponentTable("debugPrint", NULL, NULL, NULL);
+    nn_defineMethod(t, "log", false, emulator_debugPrint, NULL, "logs stuff");
+
+    nn_newComponent(computer, "debugPrint", -1, t, NULL);
+
+    double lastTime = nn_realTime();
     while(true) {
+        double now = nn_realTime();
+        double dt = now - lastTime;
+        if(dt == 0) dt = 1.0/60;
+        lastTime = now;
+
+        // remove some heat per second
+        nn_removeHeat(computer, dt * (rand() % 12));
+        if(nn_isOverheating(computer)) continue;
+
         int state = nn_tickComputer(computer);
         if(state == NN_STATE_SWITCH) {
             nn_architecture *nextArch = nn_getNextArchitecture(computer);
diff --git a/src/neonucleus.h b/src/neonucleus.h
index 22e9795..bb1a195 100644
--- a/src/neonucleus.h
+++ b/src/neonucleus.h
@@ -57,6 +57,7 @@
 #define NN_MAX_USERDATA 1024
 #define NN_MAX_USER_SIZE 128
 #define NN_MAX_SIGNAL_SIZE 8192
+#define NN_OVERHEAT_MIN 100
 
 typedef struct nn_guard nn_guard;
 typedef struct nn_universe nn_universe;
@@ -178,37 +179,33 @@ void nn_lockComputer(nn_computer *computer);
 void nn_unlockComputer(nn_computer *computer);
 
 /// This means the computer has not yet started.
-/// This is used to determine whether newComponent and removeComponent should emit signals.
 #define NN_STATE_SETUP 0
 
 /// This means the computer is running. There is no matching off-state, as the computer is
 /// only off when it is deleted.
 #define NN_STATE_RUNNING 1
 
-/// This means a call budget exceeded, and the sandbox should make the computer yield.
-#define NN_STATE_OVERUSED 2
-
 /// This means a component's invocation could not be done due to a crucial resource being busy.
 /// The sandbox should yield, then *invoke the component method again.*
-#define NN_STATE_BUSY 3
+#define NN_STATE_BUSY 2
 
 /// This state occurs when a call to removeEnergy has consumed all the energy left.
 /// The sandbox should yield, and the runner should shut down the computer.
 /// No error is set, the sandbox can set it if it wanted to.
-#define NN_STATE_BLACKOUT 4
+#define NN_STATE_BLACKOUT 3
 
 /// This state only indicates that the runner should turn off the computer, but not due to a blackout.
 /// The runner need not bring it back.
-#define NN_STATE_CLOSING 5
+#define NN_STATE_CLOSING 4
 
 /// This state indicates that the runner should turn off the computer, but not due to a blackout.
 /// The runner should bring it back.
 /// By "bring it back", we mean delete the computer, then recreate the entire state.
-#define NN_STATE_REPEAT 6
+#define NN_STATE_REPEAT 5
 
 /// This state indciates that the runner should turn off the computer, to switch architectures.
 /// The architecture is returned by getNextArchitecture.
-#define NN_STATE_SWITCH 7
+#define NN_STATE_SWITCH 6
 
 int nn_getState(nn_computer *computer);
 void nn_setState(nn_computer *computer, int state);
@@ -219,6 +216,17 @@ size_t nn_getMaxEnergy(nn_computer *computer);
 void nn_removeEnergy(nn_computer *computer, size_t energy);
 void nn_addEnergy(nn_computer *computer, size_t amount);
 
+double nn_getTemperature(nn_computer *computer);
+double nn_getThermalCoefficient(nn_computer *computer);
+double nn_getRoomTemperature(nn_computer *computer);
+void nn_setTemperature(nn_computer *computer, double temperature);
+void nn_setTemperatureCoefficient(nn_computer *computer, double coefficient);
+void nn_setRoomTemperature(nn_computer *computer, double roomTemperature);
+void nn_addHeat(nn_computer *computer, double heat);
+void nn_removeHeat(nn_computer *computer, double heat);
+/* Checks against NN_OVERHEAT_MIN */
+bool nn_isOverheating(nn_computer *computer);
+
 // NULL if there is no error.
 const char *nn_getError(nn_computer *computer);
 void nn_clearError(nn_computer *computer);
@@ -243,8 +251,11 @@ nn_computer *nn_getComputerOfComponent(nn_component *component);
 nn_address nn_getComponentAddress(nn_component *component);
 int nn_getComponentSlot(nn_component *component);
 nn_componentTable *nn_getComponentTable(nn_component *component);
+const char *nn_getComponentType(nn_componentTable *table);
 void *nn_getComponentUserdata(nn_component *component);
 nn_component *nn_findComponent(nn_computer *computer, nn_address address);
+/* RESULT SHOULD BE NN_FREE()'D OR ELSE MEMORY IS LEAKED */
+nn_component **nn_listComponent(nn_computer *computer, size_t *len);
 
 // Component VTable stuff
 
diff --git a/src/sandbox.lua b/src/sandbox.lua
index 5187d43..d926c43 100644
--- a/src/sandbox.lua
+++ b/src/sandbox.lua
@@ -1,5 +1,7 @@
-print(string.format("%d / %d", computer.usedMemory(), computer.totalMemory()))
-print(string.format("Computer Address: %q, Tmp Address: %q", computer.address(), computer.tmpAddress()))
+print(component.doc("debugPrint", "log"))
+local a, b, c = component.invoke("debugPrint", "log", "Absolute cinema")
+print(a, b, c)
 
-print(computer.getArchitecture())
-print(table.unpack(computer.getArchitectures()))
+computer.pushSignal("stuff", 123, "b", false, nil)
+
+print(computer.popSignal())
diff --git a/src/testLuaArch.c b/src/testLuaArch.c
index f5daf68..37e32db 100644
--- a/src/testLuaArch.c
+++ b/src/testLuaArch.c
@@ -43,6 +43,78 @@ nn_computer *testLuaArch_getComputer(lua_State *L) {
     return testLuaArch_get(L)->computer;
 }
 
+static nn_value testLuaArch_getValue(lua_State *L, int index) {
+    if(lua_isinteger(L, index)) {
+        return nn_values_integer(lua_tointeger(L, index));
+    }
+    if(lua_isnumber(L, index)) {
+        return nn_values_number(lua_tonumber(L, index));
+    }
+    if(lua_isboolean(L, index)) {
+        return nn_values_boolean(lua_toboolean(L, index));
+    }
+    if(lua_isnoneornil(L, index)) {
+        return nn_values_nil();
+    }
+    if(lua_isstring(L, index)) {
+        size_t l = 0;
+        const char *s = lua_tolstring(L, index, &l);
+        return nn_values_string(s, l);
+    }
+    //TODO: bring it back once I make everything else not leak memory
+    //luaL_argcheck(L, false, index, luaL_typename(L, index));
+    return nn_values_nil();
+}
+
+static void testLuaArch_pushValue(lua_State *L, nn_value val) {
+    int t = nn_values_getType(val);
+    if(t == NN_VALUE_NIL) {
+        lua_pushnil(L);
+        return;
+    }
+    if(t == NN_VALUE_INT) {
+        lua_pushinteger(L, val.integer);
+        return;
+    }
+    if(t == NN_VALUE_NUMBER) {
+        lua_pushnumber(L, val.number);
+        return;
+    }
+    if(t == NN_VALUE_BOOL) {
+        lua_pushboolean(L, val.boolean);
+        return;
+    }
+    if(t == NN_VALUE_STR) {
+        lua_pushlstring(L, val.string->data, val.string->len);
+        return;
+    }
+    if(t == NN_VALUE_CSTR) {
+        lua_pushstring(L, val.cstring);
+        return;
+    }
+    if(t == NN_VALUE_ARRAY) {
+        nn_array *arr = val.array;
+        lua_createtable(L, arr->len, 0);
+        int luaVal = lua_gettop(L);
+        for(size_t i = 0; i < arr->len; i++) {
+            testLuaArch_pushValue(L, arr->values[i]);
+            lua_seti(L, luaVal, i+1);
+        }
+        return;
+    }
+    if(t == NN_VALUE_TABLE) {
+        nn_table *tbl = val.table;
+        lua_createtable(L, 0, tbl->len);
+        int luaVal = lua_gettop(L);
+        for(size_t i = 0; i < tbl->len; i++) {
+            testLuaArch_pushValue(L, tbl->pairs[i].key);
+            testLuaArch_pushValue(L, tbl->pairs[i].val);
+            lua_settable(L, luaVal);
+        }
+        return;
+    }
+}
+
 static int testLuaArch_computer_usedMemory(lua_State *L) {
     testLuaArch *s = testLuaArch_get(L);
     lua_pushinteger(L, s->memoryUsed);
@@ -133,6 +205,123 @@ static int testLuaArch_computer_setArchitecture(lua_State *L) {
     return 0;
 }
 
+static int testLuaArch_computer_isOverheating(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    lua_pushboolean(L, nn_isOverheating(c));
+    return 1;
+}
+
+static int testLuaArch_computer_getTemperature(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    lua_pushnumber(L, nn_getTemperature(c));
+    return 1;
+}
+
+static int testLuaArch_computer_addHeat(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    double n = luaL_checknumber(L, 1);
+    nn_addHeat(c, n);
+    return 0;
+}
+
+static int testLuaArch_computer_pushSignal(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    luaL_checkstring(L, 1);
+    int argc = lua_gettop(L);
+    if(argc > NN_MAX_ARGS) luaL_error(L, "too many arguments");
+    nn_value args[argc];
+    for(size_t i = 0; i < argc; i++) {
+        args[i] = testLuaArch_getValue(L, i+1);
+    }
+    const char *err = nn_pushSignal(c, args, argc);
+    if(err != NULL) {
+        for(size_t i = 0; i < argc; i++) {
+            nn_values_drop(args[i]);
+        }
+        luaL_error(L, "%s", err);
+        return 0;
+    }
+    return 0;
+}
+
+static int testLuaArch_computer_popSignal(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    size_t retc = nn_signalSize(c);
+    for(size_t i = 0; i < retc; i++) {
+        testLuaArch_pushValue(L, nn_fetchSignalValue(c, i));
+    }
+    nn_popSignal(c);
+    return retc;
+}
+
+static int testLuaArch_component_list(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    size_t len = 0;
+    nn_component **components = nn_listComponent(c, &len);
+    lua_createtable(L, 0, len);
+    int list = lua_gettop(L);
+    for(size_t i = 0; i < len; i++) {
+        nn_component *component = components[i];
+        nn_componentTable *table = nn_getComponentTable(component);
+        nn_address addr = nn_getComponentAddress(component);
+        const char *type = nn_getComponentType(table);
+
+        lua_pushstring(L, type);
+        lua_setfield(L, list, addr);
+    }
+    nn_free(components);
+    return 1;
+}
+
+static int testLuaArch_component_doc(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    const char *addr = luaL_checkstring(L, 1);
+    const char *method = luaL_checkstring(L, 2);
+    nn_component *component = nn_findComponent(c, (char *)addr);
+    if(component == NULL) {
+        lua_pushnil(L);
+        lua_pushstring(L, "no such component");
+        return 2;
+    }
+    const char *doc = nn_methodDoc(nn_getComponentTable(component), method);
+    if(doc == NULL) {
+        lua_pushnil(L);
+    } else {
+        lua_pushstring(L, doc);
+    }
+    return 1;
+}
+
+
+static int testLuaArch_component_invoke(lua_State *L) {
+    nn_computer *c = testLuaArch_getComputer(L);
+    const char *addr = luaL_checkstring(L, 1);
+    const char *method = luaL_checkstring(L, 2);
+    int argc = lua_gettop(L) - 2;
+    nn_component *component = nn_findComponent(c, (char *)addr);
+    if(component == NULL) {
+        lua_pushnil(L);
+        lua_pushstring(L, "no such component");
+        return 2;
+    }
+    nn_resetCall(c);
+    for(size_t i = 0; i < argc; i++) {
+        nn_addArgument(c, testLuaArch_getValue(L, 2 + argc));
+    }
+    if(!nn_invokeComponentMethod(component, method)) {
+        nn_resetCall(c);
+        lua_pushnil(L);
+        lua_pushstring(L, "no such method");
+        return 2;
+    }
+    size_t retc = nn_getReturnCount(c);
+    for(size_t i = 0; i < retc; i++) {
+        testLuaArch_pushValue(L, nn_getReturn(c, i));
+    }
+    nn_resetCall(c);
+    return retc;
+}
+
 void testLuaArch_loadEnv(lua_State *L) {
     lua_createtable(L, 0, 10);
     int computer = lua_gettop(L);
@@ -148,6 +337,8 @@ void testLuaArch_loadEnv(lua_State *L) {
     lua_setfield(L, computer, "tmpAddress");
     lua_pushcfunction(L, testLuaArch_computer_uptime);
     lua_setfield(L, computer, "uptime");
+    lua_pushcfunction(L, testLuaArch_computer_beep);
+    lua_setfield(L, computer, "beep");
     lua_pushcfunction(L, testLuaArch_computer_energy);
     lua_setfield(L, computer, "energy");
     lua_pushcfunction(L, testLuaArch_computer_maxEnergy);
@@ -158,7 +349,23 @@ void testLuaArch_loadEnv(lua_State *L) {
     lua_setfield(L, computer, "getArchitectures");
     lua_pushcfunction(L, testLuaArch_computer_setArchitecture);
     lua_setfield(L, computer, "setArchitecture");
+    lua_pushcfunction(L, testLuaArch_computer_isOverheating);
+    lua_setfield(L, computer, "isOverheating");
+    lua_pushcfunction(L, testLuaArch_computer_getTemperature);
+    lua_setfield(L, computer, "getTemperature");
+    lua_pushcfunction(L, testLuaArch_computer_addHeat);
+    lua_setfield(L, computer, "addHeat");
     lua_setglobal(L, "computer");
+
+    lua_createtable(L, 0, 10);
+    int component = lua_gettop(L);
+    lua_pushcfunction(L, testLuaArch_component_list);
+    lua_setfield(L, component, "list");
+    lua_pushcfunction(L, testLuaArch_component_doc);
+    lua_setfield(L, component, "doc");
+    lua_pushcfunction(L, testLuaArch_component_invoke);
+    lua_setfield(L, component, "invoke");
+    lua_setglobal(L, "component");
 }
 
 testLuaArch *testLuaArch_setup(nn_computer *computer, void *_) {
diff --git a/src/utils.c b/src/utils.c
index 1fbf7a8..fe2539c 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -44,7 +44,6 @@ double nn_realTime() {
 
 #else
 
-
 double nn_realTime() {
     LARGE_INTEGER frequency = {0};
     if(!QueryPerformanceFrequency(&frequency)) return 0;
diff --git a/src/value.c b/src/value.c
index d10da19..f1ca324 100644
--- a/src/value.c
+++ b/src/value.c
@@ -155,6 +155,47 @@ nn_pair nn_values_getPair(nn_value obj, size_t idx) {
     return obj.table->pairs[idx];
 }
 
+intptr_t nn_toInt(nn_value val) {
+    if(val.tag == NN_VALUE_INT) return val.integer;
+    if(val.tag == NN_VALUE_NUMBER) return val.number;
+    return 0;
+}
+
+double nn_toNumber(nn_value val) {
+    if(val.tag == NN_VALUE_INT) return val.integer;
+    if(val.tag == NN_VALUE_NUMBER) return val.number;
+    return 0;
+}
+
+bool nn_toBoolean(nn_value val) {
+    if(val.tag == NN_VALUE_NIL) return false;
+    if(val.tag == NN_VALUE_BOOL) return val.boolean;
+    return true;
+}
+
+const char *nn_toCString(nn_value val) {
+    if(val.tag == NN_VALUE_CSTR) return val.cstring;
+    if(val.tag == NN_VALUE_STR) return val.string->data;
+    return NULL;
+}
+
+const char *nn_toString(nn_value val, size_t *len) {
+    size_t l = 0;
+    const char *c = NULL;
+
+    if(val.tag == NN_VALUE_CSTR) {
+        c = val.cstring;
+        l = strlen(c);
+    }
+    if(val.tag == NN_VALUE_STR) {
+        c = val.string->data;
+        l = val.string->len;
+    }
+
+    if(len == NULL) *len = l;
+    return c;
+}
+
 size_t nn_measurePacketSize(nn_value *vals, size_t len) {
     size_t size = 0;
     for(size_t i = 0; i < len; i++) {