diff --git a/src/main.c b/src/main.c
index f66e13a..e7a06de 100644
--- a/src/main.c
+++ b/src/main.c
@@ -18,26 +18,30 @@
 
 sfVertexArray *renderArray;
 sfRenderWindow *window;
+sfFont *font;
+sfText *renderText;
 sfRenderStates renderStates;
+sfRectangleShape *haltRect;
 
+uint8_t halt = 0;
+uint8_t showHelp = 0;
+uint8_t showDebug = 0;
 
-void openFile(const char *inputFile){
+int openFile(const char *inputFile){
     FILE *file = fopen(inputFile, "rb");
+    int retCode = 0;
     
     if (file != NULL){
         fseek(file, 0, SEEK_END);
         long filelen = ftell(file);
         rewind(file);
         
-        fread(rom, filelen, 1, file);
-    
-        printf("Loaded File\n");
-    } else {
-        printf("Error while opening file\n");
-        exit(1);
-    }
+        if (fread(rom, filelen, 1, file) != 1) retCode = 1;
+    } else retCode = 1;
     
     fclose(file);
+    
+    return retCode;
 }
 
 void resetSystem(){
@@ -48,35 +52,87 @@ void resetSystem(){
 
 void updateRenderStates(){
     renderStates.transform = sfTransform_Identity;
-    sfTransform_scale(&renderStates.transform, displayScale, displayScale);
+    sfTransform_scale(&renderStates.transform, displayscale, displayscale);
 }
 
 void drawScreen(){
     sfRenderWindow_drawVertexArray(window, renderArray, &renderStates);
+    if (halt){
+        sfRenderWindow_drawRectangleShape(window, haltRect, &renderStates);
+    }
+    if (showHelp){
+        sfText_setString(renderText, HELPKEYS);
+        
+        sfRenderWindow_drawText(window, renderText, &renderStates);
+    }
+}
+
+void writeHelp(int type){
+    if (!type)  printf(HELP);
+    else        printf(HELPKEYS);
+    
+    exit(EXIT_SUCCESS);
+}
+
+void writePreamble() {
+    printf(PREAMBLE);
+}
+
+void fetchArgs(int argc, char *argv[]){
+    writePreamble();
+    
+    for (int i = 1; i < argc; i++) {
+        if (!strcmp(argv[i], "--help"))                 writeHelp(0);
+        else if (!strcmp(argv[i], "--help-keys"))       writeHelp(1);
+        else if (!strcmp(argv[i], "--cpuspeed"))        cpuspeed = atoi(argv[++i]);
+        else if (!strcmp(argv[i], "--scale"))           displayscale = atof(argv[++i]);
+        else if (!strcmp(argv[i], "--singlestep"))      singlestep = 1;
+        else if (!strcmp(argv[i], "--clocksteps"))      clocksteps = atoi(argv[++i]);
+        //else if (!strcmp(argv[i], "--snapshot"))        snapshotFile = &argv[i];
+        
+        else {
+            if (openFile(argv[i])){
+                printf("Unknown parameter or file '%s'\nTry '--help' for help\n", argv[i]);
+                exit(EXIT_FAILURE);
+            }
+        }
+    }
 }
 
 int main(int argc, char *argv[]){
-    if (argc == 2) { openFile(argv[1]); }
-    else {
-        puts("Please specify a input file as an Argument");
-        exit(1);
-    }
+    fetchArgs(argc, argv);
     
     window = sfRenderWindow_create((sfVideoMode){800, 600, 24}, "LS7 Emulator", sfResize | sfClose, NULL);
     sfRenderWindow_setVerticalSyncEnabled(window, sfFalse);
-    sfRenderWindow_setFramerateLimit(window, 60);
+    sfRenderWindow_setFramerateLimit(window, FPS);
     sfRenderWindow_setKeyRepeatEnabled(window, sfFalse);
 
+    font = sfFont_createFromFile("bin/font.ttf");
+    
+    renderText = sfText_create();
+    sfText_setPosition(renderText, (sfVector2f){ 50, 50 });
+    sfText_setFont(renderText, font);
+    sfText_setCharacterSize(renderText, 10);
+    sfText_setFillColor(renderText, sfWhite);
+    sfText_setOutlineColor(renderText, sfBlack);
+    sfText_setOutlineThickness(renderText, 1);
+    
+    haltRect = sfRectangleShape_create();
+    sfRectangleShape_setFillColor(haltRect, (sfColor){ 0, 0, 0, 128 });
+    sfRectangleShape_setSize(haltRect, (sfVector2f){ 384, 256 });
+    
     renderStates = sfRenderStates_default();
-    sfTransform_scale(&renderStates.transform, 2, 2);
+    sfTransform_scale(&renderStates.transform, displayscale, displayscale);
     
     resetSystem();
 
     while (sfRenderWindow_isOpen(window)){
         pollEvents(window);
         
-        for (int i = 0; i < CPUSPEED; i++) step6502();
-        irq6502();
+        if (!singlestep && !halt){
+            for (int i = 0; i < cpuspeed / FPS; i++) step6502();
+            irq6502();
+        }
         
         sfRenderWindow_clear(window, BACKCOLOR);
         updateVideo();
@@ -86,7 +142,7 @@ int main(int argc, char *argv[]){
     
     sfRenderWindow_destroy(window);
 
-    return 0;
+    return EXIT_SUCCESS;
 }