Added function key functions

src/events.c

@@ -5,6 +5,9 @@
 
 extern float displayScale;
 extern int clocksteps;
+extern uint8_t halt;
+extern uint8_t showDebug;
+extern uint8_t showHelp;
 
 extern void resetSystem();
 extern void irq6502();
@@ -29,30 +32,54 @@ void pollEvents(sfRenderWindow *window){
 				break;
 			case sfEvtKeyPressed:
 				switch (event.key.code){
-					case sfKeyEscape:
+					case sfKeyF1:	/* Close Window or show help*/
 						sfRenderWindow_close(window);
 						break;
-					case sfKeyF2:
+						
+					case sfKeyF2:	/* Show Key Help */
+						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:
-						resetSystem();
-						break;
-					case sfKeyF8:
+						
+					case sfKeyF8:	/* CPU Singlestep */
 						for (int i = 0; i < clocksteps; i++) step6502();
 						break;
-					case sfKeyF12:
-						irq6502();
+					
+					case sfKeyF9:	/* CPU Save Snapshot */
 						break;
-					case sfKeyF11:
+						
+					case sfKeyF10:	/* CPU Load recent or given snapshot */
+						break;
+						
+					case sfKeyF11:	/* CPU NMI */
 						nmi6502();
 						break;
 						
+					case sfKeyF12:	/* CPU IRQ */
+						irq6502();
+						break;
+					
 					default:
 						currentKey = event.key.code;
 						break;