diff --git a/data/OpenOS/etc/profile.lua b/data/OpenOS/etc/profile.lua
index 0938ac9..0fb2ac0 100644
--- a/data/OpenOS/etc/profile.lua
+++ b/data/OpenOS/etc/profile.lua
@@ -40,5 +40,6 @@ shell.setWorkingDirectory(os.getenv("HOME"))
 
 local home_shrc = shell.resolve(".shrc")
 if fs.exists(home_shrc) then
-  assert(loadfile(shell.resolve("source", "lua")))(home_shrc)
+	local resolved = shell.resolve("source", "lua")
+  assert(loadfile(resolved))(home_shrc)
 end
diff --git a/data/OpenOS/init.lua b/data/OpenOS/init.lua
index c08f2b1..ef35e5f 100644
--- a/data/OpenOS/init.lua
+++ b/data/OpenOS/init.lua
@@ -14,12 +14,10 @@ do
 end
 
 while true do
-	debug.print("try shell")
   local result, reason = xpcall(require("shell").getShell(), function(msg)
     return tostring(msg).."\n"..debug.traceback()
   end)
   if not result then
-	  debug.print(reason)
     io.stderr:write((reason ~= nil and tostring(reason) or "unknown error") .. "\n")
     io.write("Press any key to continue.\n")
     os.sleep(0.5)
diff --git a/rewrite/luaarch.c b/rewrite/luaarch.c
index 19d45ee..0ab102e 100644
--- a/rewrite/luaarch.c
+++ b/rewrite/luaarch.c
@@ -445,6 +445,12 @@ static int luaArch_unicode_sub(lua_State *L) {
 	if(lua_gettop(L) < 3) lua_pushinteger(L, -1);
 
 	size_t len = nn_unicode_lenPermissive(s, slen);
+   
+	// OpenOS does this...
+	if(len == 0) {
+        lua_pushstring(L, "");
+        return 1;
+    }
 
 	int start = lua_tointeger(L, 2);
 	int end = lua_tointeger(L, 3);
@@ -464,6 +470,11 @@ static int luaArch_unicode_sub(lua_State *L) {
 	if(end < 0) end = 0;
 	if(end >= len) end = len-1;
 
+	if(start > end) {
+		lua_pushstring(L, "");
+		return 1;
+	}
+
 	nn_codepoint *cp = malloc(sizeof(*cp) * len);
 	nn_unicode_codepointsPermissive(s, slen, cp);
 
@@ -484,6 +495,11 @@ static int luaArch_unicode_wlen(lua_State *L) {
 	return 1;
 }
 
+static int luaArch_unicode_wtrunc(lua_State *L) {
+	lua_pushvalue(L, 1);
+	return 1;
+}
+
 static void luaArch_loadEnv(lua_State *L) {
 	lua_createtable(L, 0, 10);
 	int computer = lua_gettop(L);
@@ -547,8 +563,10 @@ static void luaArch_loadEnv(lua_State *L) {
 	lua_setfield(L, component, "len");
 	lua_pushcfunction(L, luaArch_unicode_sub);
 	lua_setfield(L, component, "sub");
-	lua_pushcfunction(L, luaArch_unicode_wlen);
+	lua_pushcfunction(L, luaArch_unicode_len);
 	lua_setfield(L, component, "wlen");
+	lua_pushcfunction(L, luaArch_unicode_wtrunc);
+	lua_setfield(L, component, "wtrunc");
 	lua_setglobal(L, "unicode");
 }
 
diff --git a/rewrite/machine.lua b/rewrite/machine.lua
index d84d575..bf2e92d 100644
--- a/rewrite/machine.lua
+++ b/rewrite/machine.lua
@@ -21,8 +21,9 @@ function coroutine.resume(co, ...)
 	end
 end
 
-local clist, cinvoke, computer, component, print = component.list, component.invoke, computer, component, print
+local clist, cinvoke, computer, component, print, unicode = component.list, component.invoke, computer, component, print, unicode
 debug.print = print
+debug.sysyield = sysyield
 
 function component.list(ctype, exact)
 	local list = clist()
@@ -155,6 +156,44 @@ function computer.pullSignal(timeout)
 	end
 end
 
+unicode.upper, unicode.lower = string.upper, string.lower
+
+unicode.isWide = function(s)
+	local c = unicode.sub(s, 1, 1)
+	return unicode.wlen(c) > unicode.len(c)
+end
+
+unicode.wtrunc = function(str,space)
+	space = space - 1
+	return unicode.sub(str, 1, space)
+end
+
+unicode.sub = function(str, a, b)
+	if not b then b = utf8.len(str) end
+	if not a then a = 1 end
+	-- a = math.max(a,1)
+	
+	if a < 0 then
+		-- negative
+		
+		a = utf8.len(str) + a + 1
+	end
+	
+	if b < 0 then
+		b = utf8.len(str) + b + 1
+	end
+	
+	if a > b then return "" end
+	
+	if b >= utf8.len(str) then b = #str else b = utf8.offset(str,b+1)-1 end
+	
+	if a > utf8.len(str) then return "" end
+	a = utf8.offset(str,a)
+	
+	return str:sub(a,b)
+	-- return str:sub(a, b)
+end
+
 function checkArg(arg, val, ...)
 	local t = {...}
 	for i=1,#t do
@@ -165,7 +204,7 @@ end
 
 if os.getenv("NN_REPL") == "1" then
 	while true do
-		io.write("lua> ")
+		io.write("\x1b[34mlua>\x1b[0m ")
 		io.flush()
 		local l = io.read("l")
 		if not l then break end
@@ -176,6 +215,7 @@ if os.getenv("NN_REPL") == "1" then
 			f, err = load(l, "=repl")
 			if f then f() else print(err) end
 		end
+		coroutine.yield()
 	end
 	io.write("\n")
 	print("exiting repl")
diff --git a/rewrite/main.c b/rewrite/main.c
index 4a82abb..48ac892 100644
--- a/rewrite/main.c
+++ b/rewrite/main.c
@@ -153,12 +153,16 @@ nn_Exit ne_fsState_handler(nn_FilesystemRequest *req) {
 		switch(mode[0]) {
 			case 'r':
 				mode = "rb";
+				break;
 			case 'w':
 				mode = "wb";
+				break;
 			case 'a':
 				mode = "ab";
+				break;
 			default:
 				mode = "rb";
+				break;
 		}
 		ne_fsState_truepath(state, truepath, path);
 
@@ -568,15 +572,21 @@ nn_Exit ne_gpu_handler(nn_GPURequest *req) {
 
 		x = req->x;
 		y = req->y;
-		for(int i = 0; i < req->width; i++) {
+		const char *s = req->text;
+		for(int i = 0; i < req->width;) {
 			if(!ne_inScreenBuf(activeBuf, x, y)) break;
+			size_t w = nn_unicode_validateFirstChar(s + i, req->width - i);
 			ne_Pixel p = {
 				.fg = state->currentFg,
 				.bg = state->currentBg,
 				.isFgPalette = state->isFgPalette,
 				.isBgPalette = state->isBgPalette,
-				.codepoint = req->text[i],
+				.codepoint = (unsigned char)s[i],
 			};
+			if(w > 0) {
+				p.codepoint = nn_unicode_firstCodepoint(s + i);
+				i += w;
+			} else i++;
 			ne_setPixel(activeBuf, x, y, p);
 			x += dx;
 			y += dy;
@@ -592,8 +602,7 @@ nn_Exit ne_gpu_handler(nn_GPURequest *req) {
 		y = req->y;
 		w = req->width;
 		h = req->height;
-		if(x < 1) x = 1;
-		if(y < 1) y = 1;
+		// prevent CPU DoS
 		if(w >= activeBuf->width) w = activeBuf->width - 1;
 		if(h >= activeBuf->height) h = activeBuf->height - 1;
 
@@ -609,6 +618,93 @@ nn_Exit ne_gpu_handler(nn_GPURequest *req) {
 				ne_setPixel(activeBuf, x + ox, y + oy, p);
 			}
 		}
+		ne_remapScreen(activeBuf);
+		return NN_OK;
+	case NN_GPU_COPY:
+		if(activeBuf == NULL) {
+			nn_setError(C, "no screen");
+			return NN_EBADCALL;
+		}
+		x = req->x;
+		y = req->y;
+		w = req->width;
+		h = req->height;
+		// prevent CPU DoS
+		if(w >= activeBuf->width) w = activeBuf->width - 1;
+		if(h >= activeBuf->height) h = activeBuf->height - 1;
+
+		ne_Pixel *buf = malloc(sizeof(*buf) * w * h);
+		if(buf == NULL) return NN_ENOMEM;
+		
+		for(int oy = 0; oy < h; oy++) {
+			for(int ox = 0; ox < w; ox++) {
+				buf[oy * w + ox] = ne_getPixel(activeBuf, x + ox, y + oy);
+			}
+		}
+
+		for(int oy = 0; oy < h; oy++) {
+			for(int ox = 0; ox < w; ox++) {
+				p = buf[oy * w + ox];
+				ne_setPixel(activeBuf, x + ox + req->tx, y + oy + req->ty, p);
+			}
+		}
+		free(buf);
+		ne_remapScreen(activeBuf);
+		return NN_OK;
+	case NN_GPU_GETDEPTH:
+		if(activeBuf != NULL) {
+			req->x = activeBuf->depth;
+		} else {
+			req->x = req->gpuConf->maxDepth;
+		}
+		return NN_OK;
+	case NN_GPU_GETVIEWPORT:
+		if(activeBuf == NULL) {
+			nn_setError(C, "no screen");
+			return NN_EBADCALL;
+		}
+		req->width = activeBuf->width;
+		req->height = activeBuf->height;
+		return NN_OK;
+	case NN_GPU_GETFOREGROUND:
+		req->x = state->currentFg;
+		req->y = state->isFgPalette ? 1 : 0;
+		return NN_OK;
+	case NN_GPU_GETBACKGROUND:
+		req->x = state->currentBg;
+		req->y = state->isBgPalette ? 1 : 0;
+		return NN_OK;
+	case NN_GPU_SETFOREGROUND:
+		x = req->x;
+		y = req->y;
+		if(y != 0) {
+			// validate the palette index
+			if(activeBuf == NULL || x < 0 || x >= activeBuf->maxPalette) {
+				nn_setError(C, "invalid palette index");
+				return NN_EBADCALL;
+			}
+		}
+		req->x = state->currentFg;
+		req->y = state->isFgPalette ? 1 : 0;
+		state->currentFg = x;
+		state->isFgPalette = y != 0;
+		ne_remapScreen(activeBuf);
+		return NN_OK;
+	case NN_GPU_SETBACKGROUND:
+		x = req->x;
+		y = req->y;
+		if(y != 0) {
+			// validate the palette index
+			if(activeBuf == NULL || x < 0 || x >= activeBuf->maxPalette) {
+				nn_setError(C, "invalid palette index");
+				return NN_EBADCALL;
+			}
+		}
+		req->x = state->currentBg;
+		req->y = state->isBgPalette ? 1 : 0;
+		state->currentBg = x;
+		state->isBgPalette = y != 0;
+		ne_remapScreen(activeBuf);
 		return NN_OK;
 	}
 	return NN_OK;
@@ -620,11 +716,19 @@ Color ne_processColor(unsigned int color) {
     return GetColor(color);
 }
 
+double ne_timeProc(void *_) {
+	(void)_;
+	double t = GetTime();
+	return (int)(t*100) / 100.0;
+}
+
 int main() {
 	nn_Context ctx;
 	nn_initContext(&ctx);
 	nn_initPalettes();
 
+	ctx.time = ne_timeProc;
+
 	SetConfigFlags(FLAG_WINDOW_RESIZABLE);
 	InitWindow(800, 600, "NeoNucleus Test Emulator");
 
diff --git a/rewrite/neonucleus.c b/rewrite/neonucleus.c
index 7f5d700..5c1cc06 100644
--- a/rewrite/neonucleus.c
+++ b/rewrite/neonucleus.c
@@ -2752,11 +2752,15 @@ nn_Exit nn_gpu_handler(nn_ComponentRequest *req) {
 			greq.text = (char *)nn_tolstring(C, 0, &len);
 			greq.width = len;
 			greq.x = nn_toboolean(C, 1) ? 1 : 0;
-			return state->handler(&greq);
+			err = state->handler(&greq);
+			if(err) return err;
+			return nn_pushbool(C, true);
 		}
 		if(nn_strcmp(method, "unbind") == 0) {
 			greq.action = NN_GPU_UNBIND;
-			return state->handler(&greq);
+			err = state->handler(&greq);
+			if(err) return err;
+			return nn_pushbool(C, true);
 		}
 		if(nn_strcmp(method, "getScreen") == 0) {
 			char buf[NN_MAX_ADDRESS];
@@ -2798,6 +2802,148 @@ nn_Exit nn_gpu_handler(nn_ComponentRequest *req) {
 			req->returnCount = 1;
 			return nn_pushbool(C, true);
 		}
+		if(nn_strcmp(method, "get") == 0) {
+			nn_costComponent(C, req->compAddress, conf.setPerTick);
+			if(nn_checkinteger(C, 0, "bad argument #1 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 1, "bad argument #2 (integer expected)")) return NN_EBADCALL;
+			greq.action = NN_GPU_GET;
+			greq.x = nn_tointeger(C, 0);
+			greq.y = nn_tointeger(C, 1);
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 5;
+			char buf[NN_MAX_UNICODE_BUFFER];
+			size_t len = nn_unicode_codepointToChar(buf, greq.codepoint);
+			err = nn_pushlstring(C, buf, len);
+			if(err) return err;
+			err = nn_pushinteger(C, greq.width);
+			if(err) return err;
+			err = nn_pushinteger(C, greq.height);
+			if(err) return err;
+			if(greq.dest == -1) err = nn_pushnull(C);
+			else err = nn_pushinteger(C, greq.dest);
+			if(err) return err;
+			if(greq.src == -1) err = nn_pushnull(C);
+			else err = nn_pushinteger(C, greq.src);
+			if(err) return err;
+			return NN_OK;
+		}
+		if(nn_strcmp(method, "fill") == 0) {
+			nn_costComponent(C, req->compAddress, conf.fillPerTick);
+			if(nn_checkinteger(C, 0, "bad argument #1 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 1, "bad argument #2 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 2, "bad argument #3 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 3, "bad argument #4 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkstring(C, 4, "bad argument #5 (string expected)")) return NN_EBADCALL;
+			greq.action = NN_GPU_FILL;
+			size_t len;
+			const char *text = nn_tolstring(C, 4, &len);
+			if(nn_unicode_validateFirstChar(text, len) == 0) {
+				nn_setError(C, "invalid UTF-8 character");
+				return NN_EBADCALL;
+			}
+			greq.codepoint = nn_unicode_firstCodepoint(text);
+			greq.x = nn_tointeger(C, 0);
+			greq.y = nn_tointeger(C, 1);
+			greq.width = nn_tointeger(C, 2);
+			greq.height = nn_tointeger(C, 3);
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 1;
+			return nn_pushbool(C, true);
+		}
+		if(nn_strcmp(method, "copy") == 0) {
+			nn_costComponent(C, req->compAddress, conf.copyPerTick);
+			if(nn_checkinteger(C, 0, "bad argument #1 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 1, "bad argument #2 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 2, "bad argument #3 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 3, "bad argument #4 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 4, "bad argument #5 (integer expected)")) return NN_EBADCALL;
+			if(nn_checkinteger(C, 5, "bad argument #6 (integer expected)")) return NN_EBADCALL;
+			greq.action = NN_GPU_COPY;
+			greq.x = nn_tointeger(C, 0);
+			greq.y = nn_tointeger(C, 1);
+			greq.width = nn_tointeger(C, 2);
+			greq.height = nn_tointeger(C, 3);
+			greq.tx = nn_tointeger(C, 4);
+			greq.ty = nn_tointeger(C, 5);
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 1;
+			return nn_pushbool(C, true);
+		}
+		if(nn_strcmp(method, "getDepth") == 0) {
+			greq.action = NN_GPU_GETDEPTH;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 1;
+			return nn_pushinteger(C, greq.x);
+		}
+		if(nn_strcmp(method, "getViewport") == 0) {
+			greq.action = NN_GPU_GETVIEWPORT;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 2;
+			err = nn_pushinteger(C, greq.width);
+			if(err) return err;
+			return nn_pushinteger(C, greq.height);
+		}
+		if(nn_strcmp(method, "setForeground") == 0) {
+			if(nn_checkinteger(C, 0, "bad argument #1 (integer expected)")) return NN_EBADCALL;
+			err = nn_defaultboolean(C, 1, false);
+			if(err) return err;
+			if(nn_checkinteger(C, 1, "bad argument #2 (boolean expected)")) return NN_EBADCALL;
+			greq.action = NN_GPU_SETFOREGROUND;
+			greq.x = nn_tointeger(C, 0);
+			greq.y = nn_toboolean(C, 1) ? 1 : 0;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 2;
+			err = nn_pushinteger(C, greq.x);
+			if(err) return err;
+			err = nn_pushbool(C, greq.y != 0);
+			if(err) return err;
+			return NN_OK;
+		}
+		if(nn_strcmp(method, "getForeground") == 0) {
+			greq.action = NN_GPU_GETFOREGROUND;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 2;
+			err = nn_pushinteger(C, greq.x);
+			if(err) return err;
+			err = nn_pushbool(C, greq.y != 0);
+			if(err) return err;
+			return NN_OK;
+		}
+		if(nn_strcmp(method, "setBackground") == 0) {
+			if(nn_checkinteger(C, 0, "bad argument #1 (integer expected)")) return NN_EBADCALL;
+			err = nn_defaultboolean(C, 1, false);
+			if(err) return err;
+			if(nn_checkinteger(C, 1, "bad argument #2 (boolean expected)")) return NN_EBADCALL;
+			greq.action = NN_GPU_SETBACKGROUND;
+			greq.x = nn_tointeger(C, 0);
+			greq.y = nn_toboolean(C, 1) ? 1 : 0;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 2;
+			err = nn_pushinteger(C, greq.x);
+			if(err) return err;
+			err = nn_pushbool(C, greq.y != 0);
+			if(err) return err;
+			return NN_OK;
+		}
+		if(nn_strcmp(method, "getBackground") == 0) {
+			greq.action = NN_GPU_GETBACKGROUND;
+			err = state->handler(&greq);
+			if(err) return err;
+			req->returnCount = 2;
+			err = nn_pushinteger(C, greq.x);
+			if(err) return err;
+			err = nn_pushbool(C, greq.y != 0);
+			if(err) return err;
+			return NN_OK;
+		}
 		nn_setError(C, "method not yet implemented");
 		return NN_EBADCALL;
 	}
@@ -3254,7 +3400,7 @@ size_t nn_unicode_codepointSize(nn_codepoint codepoint) {
     return 1;
 }
 
-size_t nn_unicode_codepointToChar(char buffer[NN_MAXIMUM_UNICODE_BUFFER], nn_codepoint codepoint) {
+size_t nn_unicode_codepointToChar(char buffer[NN_MAX_UNICODE_BUFFER], nn_codepoint codepoint) {
     size_t codepointSize = nn_unicode_codepointSize(codepoint);
 
     if (codepointSize == 1) {
@@ -3304,7 +3450,9 @@ size_t nn_unicode_wlen(const char *s, size_t len) {
 	for(size_t i = 0; i < len;) {
 		nn_codepoint codepoint = nn_unicode_firstCodepoint(s + i);
 		size_t size = nn_unicode_codepointSize(codepoint);
-		wlen += nn_unicode_charWidth(codepoint);
+		size_t width = nn_unicode_charWidth(codepoint);
+		if(width == 0) width = 1;
+		wlen += width;
 		i += size;
 	}
 	return wlen;
@@ -3315,12 +3463,14 @@ size_t nn_unicode_wlenPermissive(const char *s, size_t len) {
 	for(size_t i = 0; i < len;) {
 		if(nn_unicode_validateFirstChar(s + i, len - i) == 0) {
 			size_t width = nn_unicode_charWidth((unsigned char)s[i]);
+			if(width == 0) width = 1;
 			wlen += width;
 			i++;
 		} else {
 			nn_codepoint codepoint = nn_unicode_firstCodepoint(s + i);
 			size_t size = nn_unicode_codepointSize(codepoint);
 			size_t width = nn_unicode_charWidth(codepoint);
+			if(width == 0) width = 1;
 			wlen += width;
 			i += size;
 		}
diff --git a/rewrite/neonucleus.h b/rewrite/neonucleus.h
index 4793fa8..9b09806 100644
--- a/rewrite/neonucleus.h
+++ b/rewrite/neonucleus.h
@@ -85,7 +85,7 @@ extern "C" {
 #define NN_MAX_USERNAME 128
 
 // the maximum size of a UTF-8 character
-#define NN_MAXIMUM_UNICODE_BUFFER 4
+#define NN_MAX_UNICODE_BUFFER 4
 
 // the maximum size of a component error message. If the error is bigger than this,
 // it is truncated.
@@ -126,7 +126,7 @@ nn_codepoint nn_unicode_firstCodepoint(const char *s);
 size_t nn_unicode_codepointSize(nn_codepoint codepoint);
 // Writes the UTF-8 bytes for a given codepoint into buffer.
 // It does NOT write a NULL terminator, but it does return the length.
-size_t nn_unicode_codepointToChar(char buffer[NN_MAXIMUM_UNICODE_BUFFER], nn_codepoint codepoint);
+size_t nn_unicode_codepointToChar(char buffer[NN_MAX_UNICODE_BUFFER], nn_codepoint codepoint);
 // the width, on a screen, for a codepoint.
 // This matters for emojies.
 size_t nn_unicode_charWidth(nn_codepoint codepoint);