diff --git a/build.zig b/build.zig
index ffa9c98..5570ae5 100644
--- a/build.zig
+++ b/build.zig
@@ -41,6 +41,8 @@ fn addEngineSources(b: *std.Build, opts: LibBuildOpts) *std.Build.Module {
             "src/components/keyboard.c",
             "src/components/modem.c",
             "src/components/loopbackModem.c",
+            "src/components/tunnel.c",
+            "src/components/loopbackTunnel.c",
             "src/components/diskDrive.c",
         },
         .flags = &.{
diff --git a/src/components/gpu.c b/src/components/gpu.c
index f542716..71c010a 100644
--- a/src/components/gpu.c
+++ b/src/components/gpu.c
@@ -604,15 +604,6 @@ void nni_gpu_getDepth(nni_gpu *gpu, void *_, nn_component *component, nn_compute
     nn_return(computer, nn_values_integer(gpu->currentScreen->depth));
 }
 
-const char *nn_depthName(int depth) {
-    if(depth == 1) return "OneBit";
-    if(depth == 4) return "FourBit";
-    if(depth == 8) return "EightBit";
-    if(depth == 16) return "SixteenBit";
-    if(depth == 24) return "TwentyFourBit";
-    return NULL;
-}
-
 void nni_gpu_setDepth(nni_gpu *gpu, void *_, nn_component *component, nn_computer *computer) {
     if(gpu->currentScreen == NULL) return;
     int depth = nn_toInt(nn_getArgument(computer, 0));
diff --git a/src/components/loopbackTunnel.c b/src/components/loopbackTunnel.c
new file mode 100644
index 0000000..e167b0d
--- /dev/null
+++ b/src/components/loopbackTunnel.c
@@ -0,0 +1,7 @@
+#include "../neonucleus.h"
+
+nn_tunnel *nn_debugLoopbackTunnel(nn_Context *context, nn_debugLoopbackNetworkOpts opts, nn_networkControl control) {
+	nn_tunnelTable table = {};
+
+	return nn_newTunnel(context, table, control);
+}
diff --git a/src/components/screen.c b/src/components/screen.c
index 1621bbc..c0ef794 100644
--- a/src/components/screen.c
+++ b/src/components/screen.c
@@ -423,11 +423,44 @@ static nn_bool_t nni_8bit_did = false;
 static int nni_4bitl_colors[16];
 static nn_bool_t nni_4bitl_did = false;
 
+const char *nn_depthName(int depth) {
+    if(depth == 1) return "OneBit";
+    if(depth == 2) return "TwoBit";
+    if(depth == 3) return "ThreeBit";
+    if(depth == 4) return "FourBit";
+    if(depth == 8) return "EightBit";
+    if(depth == 16) return "SixteenBit";
+    if(depth == 24) return "TwentyFourBit";
+    return NULL;
+}
+
 int nn_mapDepth(int color, int depth, nn_bool_t legacy) {
     if(depth == 1) {
 		if(color == 0) return nni_mcBlack;
 		return nni_mcWhite;
     }
+	if(depth == 2) {
+		int palette[4] = {
+			0x000000,
+			0x444444,
+			0x999999,
+			0xFFFFFF,
+		};
+		return nn_mapColor(color, palette, 4);
+	}
+	if(depth == 3) {
+		int palette[8] = {
+			0x000000,
+			0xFF0000,
+			0x00FF00,
+			0xFFFF00,
+			0x0000FF,
+			0xFF00FF,
+			0x00FFFF,
+			0xFFFFFF,
+		};
+		return nn_mapColor(color, palette, 8);
+	}
     if(depth == 4) {
 		if(legacy) {
 			if(!nni_4bitl_did) {
diff --git a/src/components/tunnel.c b/src/components/tunnel.c
new file mode 100644
index 0000000..af41fb7
--- /dev/null
+++ b/src/components/tunnel.c
@@ -0,0 +1,53 @@
+#include "../neonucleus.h"
+
+typedef struct nn_tunnel {
+	nn_Context ctx;
+	nn_refc refc;
+	nn_guard *lock;
+	nn_tunnelTable table;
+	nn_networkControl ctrl;
+} nn_tunnel;
+
+nn_tunnel *nn_newTunnel(nn_Context *context, nn_tunnelTable table, nn_networkControl control) {
+	nn_Alloc *a = &context->allocator;
+
+	nn_tunnel *t = nn_alloc(a, sizeof(nn_tunnel));
+	if(t == NULL) return NULL;
+	t->lock = nn_newGuard(context);
+	if(t->lock == NULL) {
+		nn_dealloc(a, t, sizeof(nn_tunnel));
+		return NULL;
+	}
+	t->ctx = *context;
+	t->refc = 1;
+	t->table = table;
+	t->ctrl = control;
+	return t;
+}
+
+nn_guard *nn_getTunnelLock(nn_tunnel *tunnel) {
+	return tunnel->lock;
+}
+
+void nn_retainTunnel(nn_tunnel *tunnel) {
+	nn_incRef(&tunnel->refc);
+}
+
+nn_bool_t nn_destroyTunnel(nn_tunnel *tunnel) {
+	if(!nn_decRef(&tunnel->refc)) return false;
+	return true;
+}
+
+void nn_tunnel_destroy(void *_, nn_component *component, nn_tunnel *tunnel) {
+    nn_destroyTunnel(tunnel);
+}
+
+void nn_loadTunnelTable(nn_universe *universe) {
+    nn_componentTable *tunnelTable = nn_newComponentTable(nn_getAllocator(universe), "tunnel", NULL, NULL, (nn_componentDestructor *)nn_tunnel_destroy);
+    nn_storeUserdata(universe, "NN:TUNNEL", tunnelTable);
+}
+
+nn_component *nn_addTunnel(nn_computer *computer, nn_address address, int slot, nn_tunnel *tunnel) {
+    nn_componentTable *tunnelTable = nn_queryUserdata(nn_getUniverse(computer), "NN:TUNNEL");
+    return nn_newComponent(computer, address, slot, tunnelTable, tunnel);
+}
diff --git a/src/emulator.c b/src/emulator.c
index 720d53f..4c4fbd8 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -745,6 +745,25 @@ int main(int argc, char **argv) {
     nn_drive *genericDrive = nn_volatileDrive(&ctx, vdriveOpts, vdriveCtrl);
     nn_addDrive(computer, NULL, 4, genericDrive);
 
+	nn_networkControl netCtrl = {
+		.energyPerFullPacket = 0,
+		.heatPerFullPacket = 0,
+		.packetBytesPerTick = 16384,
+	};
+
+	nn_debugLoopbackNetworkOpts netOpts = {
+		.computer = computer,
+		.address = "loop",
+		.isWireless = false,
+		.maxValues = 8,
+		.maxOpenPorts = 64,
+		.maxPacketSize = 8192,
+		.maxStrength = 200,
+	};
+
+	nn_tunnel *t = nn_debugLoopbackTunnel(&ctx, netOpts, netCtrl);
+	nn_addTunnel(computer, NULL, -1, t);
+
     int maxWidth = 80, maxHeight = 32;
 
     nn_screen *s = nn_newScreen(&ctx, maxWidth, maxHeight, 24, 16, 256);
@@ -792,6 +811,8 @@ int main(int argc, char **argv) {
     double interval = 1.0/tps;
 	double totalTime = 0;
 
+	SetTargetFPS(144);
+
     while(true) {
         if(WindowShouldClose()) break;
         nn_setEnergyInfo(computer, 5000, 5000);
diff --git a/src/universe.c b/src/universe.c
index 958ebd7..d68be98 100644
--- a/src/universe.c
+++ b/src/universe.c
@@ -54,5 +54,6 @@ void nn_loadCoreComponentTables(nn_universe *universe) {
     nn_loadGraphicsCardTable(universe);
     nn_loadKeyboardTable(universe);
     nn_loadModemTable(universe);
+    nn_loadTunnelTable(universe);
 	nn_loadDiskDriveTable(universe);
 }