Makefile

@@ -20,7 +20,6 @@ ls7emulator:
 	cd ../bin
 	mv ../src/ls7emulator ./
 	strip ls7emulator
-	cp ../src/assets/font.ttf ./
 
 install: ls7emulator
 	mkdir -p $(PREFIX)/bin

src/config.h

@@ -10,36 +10,8 @@
 #define ROMLOC  	0xC000		/* ROM Page Location */
 
 #define BACKCOLOR sfBlack
-#define FPS 60
 
-#define PREAMBLE "LS7 Emulator by Gabriel Weingardt.\nLicense: GPL v.3+\n\n"
+#define CPUSPEED 4096 * 16
 
-#define HELP "Usage: LS7Emulator [options] file\n\n\
-Options:        Type    Default     Desc\n\
---help                              Show this menu\n\
---help-keys                         Show emulator key functions\n\
---cpuspeed      [int]   100000      CPU Speed given in Herz. KHz and MHz annotations like 1KHz are supported\n\
---scale         [float]   2.0       Set the starting scale of the video output\n\
---singlestep                        Enable singlestepping with the 'F8' key\n\
---clocksteps    [int]     1         Set the clock cycles cycled by a singlestep\n\
---snapshot      [string]            Import a CPU snapshot\n\
-\n"
 
-#define HELPKEYS "\
+static float displayScale = 2;
-F1              Exit emulator\n\
-F2              Show Key Help\n\
-F3              Show Debug Menu\n\
-F4              Halt CPU\n\
-F5              Reset CPU\n\
-F6              Scale--\n\
-F7              Scale++\n\
-F8              Single step CPU\n\
-F9              Save CPU snapshot\n\
-F10             Load previous snapshot\n\
-F11             CPU NMI\n\
-F12             CPU IRQ\n\n"
-
-static float displayscale = 2;
-static int cpuspeed = 100000; // 100 kHz
-static int singlestep = 0;
-static int clocksteps = 1;

src/events.c

@@ -4,15 +4,10 @@
 #include <SFML/Window.h>
 
 extern float displayScale;
-extern int clocksteps;
-extern uint8_t halt;
-extern uint8_t showDebug;
-extern uint8_t showHelp;
 
 extern void resetSystem();
 extern void irq6502();
 extern void nmi6502();
-extern void step6502();
 extern void updateRenderStates();
 extern void scanKeyboard();
 
@@ -32,53 +27,27 @@ void pollEvents(sfRenderWindow *window){
 				break;
 			case sfEvtKeyPressed:
 				switch (event.key.code){
-					case sfKeyF1:	/* Close Window or show help*/
+					case sfKeyEscape:
 						sfRenderWindow_close(window);
 						break;
 						
-					case sfKeyF2:	/* Show Key Help */
+					case sfKeyF2:
-						showHelp = !showHelp;
-						break;
-						
-					case sfKeyF3:	/* Show Debug Menu */
-						showDebug = !showDebug;
-						break;
-						
-					case sfKeyF4:	/* CPU Halt */
-						halt = !halt;
-						break;
-						
-					case sfKeyF5:	/* CPU Reset */
-						resetSystem();
-						break;
-						
-					case sfKeyF6:	/* Scale -- */
 						if (displayscale > 1) displayscale--;
 						updateRenderStates();
 						break;
-					
+					case sfKeyF3:
-					case sfKeyF7:	/* Scale ++ */
 						displayscale++;
 						updateRenderStates();
 						break;
-						
+					case sfKeyF5:
-					case sfKeyF8:	/* CPU Singlestep */
+						resetSystem();
-						for (int i = 0; i < clocksteps; i++) step6502();
 						break;
-					
+					case sfKeyF12:
-					case sfKeyF9:	/* CPU Save Snapshot */
-						break;
-						
-					case sfKeyF10:	/* CPU Load recent or given snapshot */
-						break;
-						
-					case sfKeyF11:	/* CPU NMI */
-						nmi6502();
-						break;
-						
-					case sfKeyF12:	/* CPU IRQ */
 						irq6502();
 						break;
+					case sfKeyF11:
+						nmi6502();
+						break;
 						
 					default:
 						currentKey = event.key.code;
@@ -86,7 +55,6 @@ void pollEvents(sfRenderWindow *window){
 				}
 				break;
 			case sfEvtKeyReleased:
-				// To tell keyboard.c, that no key is being pressed
 				currentKey = sfKeyUnknown;
 				break;
 					

src/main.c

@@ -18,30 +18,26 @@
 
 sfVertexArray *renderArray;
 sfRenderWindow *window;
-sfFont *font;
-sfText *renderText;
 sfRenderStates renderStates;
-sfRectangleShape *haltRect;
 
-uint8_t halt = 0;
-uint8_t showHelp = 0;
-uint8_t showDebug = 0;
 
-int openFile(const char *inputFile){
+void 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);
         
-        if (fread(rom, filelen, 1, file) != 1) retCode = 1;
+        fread(rom, filelen, 1, file);
-    } else retCode = 1;
+    
+        printf("Loaded File\n");
+    } else {
+        printf("Error while opening file\n");
+        exit(1);
+    }
     
     fclose(file);
-    
-    return retCode;
 }
 
 void resetSystem(){
@@ -52,87 +48,35 @@ 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[]){
-    fetchArgs(argc, argv);
+    if (argc == 2) { openFile(argv[1]); }
+    else {
+        puts("Please specify a input file as an Argument");
+        exit(1);
+    }
     
     window = sfRenderWindow_create((sfVideoMode){800, 600, 24}, "LS7 Emulator", sfResize | sfClose, NULL);
     sfRenderWindow_setVerticalSyncEnabled(window, sfFalse);
-    sfRenderWindow_setFramerateLimit(window, FPS);
+    sfRenderWindow_setFramerateLimit(window, 60);
     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, displayscale, displayscale);
+    sfTransform_scale(&renderStates.transform, 2, 2);
     
     resetSystem();
 
     while (sfRenderWindow_isOpen(window)){
         pollEvents(window);
         
-        if (!singlestep && !halt){
+        for (int i = 0; i < CPUSPEED; i++) step6502();
-            for (int i = 0; i < cpuspeed / FPS; i++) step6502();
+        irq6502();
-            irq6502();
-        }
         
         sfRenderWindow_clear(window, BACKCOLOR);
         updateVideo();
@@ -142,7 +86,7 @@ int main(int argc, char *argv[]){
     
     sfRenderWindow_destroy(window);
 
-    return EXIT_SUCCESS;
+    return 0;
 }
 
 

src/memory.c

@@ -21,7 +21,9 @@ uint8_t read6502(uint16_t address){
 			return keyboardResult;
 			break;
 			
-		default: return NOP;
+		default: 
+			return NOP;
+			break;
 	}
 }
 
@@ -52,10 +54,11 @@ void write6502(uint16_t address, uint8_t value){
 					break;
 			}
 			break;
+				case 0xBC00:
+					systemRegister = value;
+					break;
 					
-		case 0xBC00:
+				default: 
-			systemRegister = value;
+					break;
-			break;
-		default: break;
 	}
 }