diff --git a/Makefile b/Makefile
index 1bb8525..aa5043c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,10 @@
 all:first
 
 first:gui.o main.o simdata.o
-	gcc $^ -fsanitize=address -lncurses -ltinfo -o $@
+	gcc -ggdb $^ -fsanitize=address -lncurses -ltinfo -o $@
 
 %.o:%.c
-	gcc -c $< -Wall -Wextra -Werror -fsanitize=address
+	gcc -ggdb -c $< -Wall -Wextra -Werror -fsanitize=address
 
 .PHONY: clean
 clean:
diff --git a/gui.c b/gui.c
index d44d95e..906e02f 100644
--- a/gui.c
+++ b/gui.c
@@ -51,6 +51,7 @@ int start_gui(){
 		start_color();
 		init_pair(1, COLOR_RED, COLOR_BLACK);
 	}
+	noecho();
 	curs_set(0);
 	get_terminal_size();
 	mvprintw((terminal_height-3)/2+3,terminal_width/2-15,"Initialising the simulator...");
diff --git a/main.c b/main.c
index 2cff58d..1ed7249 100644
--- a/main.c
+++ b/main.c
@@ -22,35 +22,88 @@
 #include "gui.h"
 #include "simdata.h"
 #include "stdint.h"
+#include <unistd.h>
 
-int main(){
-	if(start_gui()){
-		printf("Failed on start_gui()\n");
+void help(char* progname){
+	printf("Usage: %s  -i <file> \n", progname);
+}
+
+int main(int argc, char* argd[] ){
+	/// PARSE COMMAND LINE ///
+	char *infile = NULL;
+	int opt;
+	while ((opt = getopt(argc, argd, "hi:")) != -1) {
+		switch (opt) {
+			case 'h':
+				help(argd[0]);
+				return 0;
+				break;
+			case 'i':
+				infile=optarg;
+			break;
+			default:
+				help(argd[0]);
+				return 1;
+				break;
+		}
+	}
+	if (infile==NULL){
+		help(argd[0]);
 		return 1;
 	}
 
+	/// READ ROM FILE ///
+	FILE* rom=fopen(infile,"r");
+	fseek(rom, 0, SEEK_END);
+	if(ftell(rom)!=16777216){
+		printf("ERROR: ROM file isn't 16MiB\n");
+		return 1;
+	}
+	fseek(rom, 0, SEEK_SET);
+
 	uint8_t *RAM=malloc(16777216); //Maximum addressable memory
 	if(!RAM){
 		gui_error("failed to allocate 16MiB of memory for the system ram");
 		return 1;
 	}
+	if(fread(RAM, 16777216, 1, rom)==0){
+		printf("ERROR: failed to read input file\n");
+		free(RAM);
+		return 1;
+	}
+	fclose(rom);
+
+
+	/// INITIALISE GUI ///
+	if(start_gui()){
+		printf("Failed on start_gui()\n");
+		free(RAM);
+		return 1;
+	}
+
 	struct simdata_t *simdata = init_simdata();
 	if(!simdata){
 		gui_error("failed to initialise simdata");
+		free(RAM);
 		return 1;
 	}
-		gui_error("failed to initialise simdata");
+	char *temp=malloc(1000);
+	sprintf(temp,"Last byte of ram is 0x%02x",RAM[0xFFFFFF]);
+	gui_error(temp);
+	free(temp);
 
 	if(gui_continue_request()){
 		end_gui();
 		printf("Failed on gui_continue_request()\n");
 		free_simdata(simdata);
+		free(RAM);
 		return 1;
 	}
 
 	if(end_gui()){
 		printf("Failed on end_gui()\n");
 		free_simdata(simdata);
+		free(RAM);
 		return 1;
 	}