diff --git a/spectrum-roms/opense.rom b/spectrum-roms/opense.rom
new file mode 100644
index 0000000..267b78d
Binary files /dev/null and b/spectrum-roms/opense.rom differ
diff --git a/src/computer.c b/src/computer.c
index c25e0fa..d0254c2 100644
--- a/src/computer.c
+++ b/src/computer.c
@@ -557,7 +557,7 @@ void register_screen (SDL_Surface * pantalla) {
 	
 	ordenador.tstados_counter_sound = 0;
 	ordenador.current_buffer = sound[0];
-	ordenador.num_buff = 0;	// first buffer
+	//ordenador.num_buff = 0;	// first buffer
 	ordenador.sound_cuantity = 0;
 	//ordenador.sound_current_value = 0;
 	
@@ -1190,6 +1190,7 @@ inline void paint_one_pixel(unsigned char *colour,unsigned char *address ) {
 inline void read_keyboard () {
 
 	unsigned int temporal_io;
+	unsigned char model128k;
 	SDL_Event evento,*pevento;
 	enum joystate_x {JOY_CENTER_X, JOY_LEFT, JOY_RIGHT};
 	enum joystate_y {JOY_CENTER_Y, JOY_UP, JOY_DOWN};
@@ -1346,7 +1347,15 @@ inline void read_keyboard () {
 		case SDLK_F9:
 			//Emulate load ""
 			countdown_buffer=8;
-			switch (ordenador.mode128k)
+			model128k = ordenador.mode128k;
+	
+			if ((ordenador.mport1 & 0x10)&&(ordenador.mode128k!=4)) //ROM 48k 
+			model128k =0;
+	
+			if ((ordenador.mode128k==0)&&(ordenador.se_basic))
+			model128k =4;
+			
+			switch (model128k)
 			{
 			case 4://Spanish 128k
 				ordenador.keyboard_buffer[0][8]= SDLK_l;		
@@ -1371,16 +1380,6 @@ inline void read_keyboard () {
 			case 2: //+2
 			case 1: //128k
 				ordenador.kbd_buffer_pointer=2;
-				if (ordenador.mport1 & 0x10) //ROM 48k
-				{
-				ordenador.keyboard_buffer[0][5]= SDLK_j;		//Load
-				ordenador.keyboard_buffer[1][5]= 0;
-				ordenador.keyboard_buffer[0][4]= SDLK_p;		//"
-				ordenador.keyboard_buffer[1][4]= SDLK_LCTRL;
-				ordenador.keyboard_buffer[0][3]= SDLK_p;		//"
-				ordenador.keyboard_buffer[1][3]= SDLK_LCTRL;
-				ordenador.kbd_buffer_pointer=5;
-				}
 				ordenador.keyboard_buffer[0][2]= SDLK_RETURN;	// Return
 				ordenador.keyboard_buffer[1][2]= 0;
 				ordenador.keyboard_buffer[0][1]= SDLK_F6;		//F6 - play
diff --git a/src/computer.h b/src/computer.h
index 28a7b45..aae1a8f 100644
--- a/src/computer.h
+++ b/src/computer.h
@@ -133,7 +133,7 @@ struct computer {
 	unsigned char sound_bit_mic;
 	unsigned int tstados_counter_sound;
 	unsigned int *current_buffer;
-	unsigned char num_buff;
+	//unsigned char num_buff;
 	unsigned int sound_cuantity; // counter for the buffer
 	unsigned char ay_registers[16]; // registers for the AY emulation
 	unsigned int aych_a,aych_b,aych_c,aych_n,aych_envel; // counters for AY emulation
@@ -162,6 +162,7 @@ struct computer {
 	unsigned char issue; // 2= 48K issue 2, 3= 48K issue 3
 	unsigned char mode128k; // 0=48K, 1=128K, 2=+2, 3=+3 4=sp
 	unsigned char videosystem; //0=PAL, 1=NTSC
+	unsigned char se_basic; //0=0ff; 1=0n
 	unsigned char joystick[2]; // 0=cursor, 1=kempston, 2=sinclair1, 3=sinclair2, 4=Fuller, 5=QAOP
 	unsigned char port254;
 
diff --git a/src/emulator.c b/src/emulator.c
index a1174f4..4c5baa6 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -394,7 +394,7 @@ void load_rom(char type) {
 
 	switch(type) {
 	case 0:
-		filenames[0]="spectrum-roms/48.rom";
+		if (ordenador.se_basic) filenames[0]="spectrum-roms/opense.rom"; else filenames[0]="spectrum-roms/48.rom";
 		filenames[1]=NULL;
 		if (rom_cartridge[0]) retval = load_rom_cartridge(); else retval=load_a_rom(filenames);
 		if (retval) {
@@ -761,6 +761,7 @@ int save_config(struct computer *object, char *filename) {
 	fprintf(fconfig,"mode=%c%c",48+object->mode128k,10);
 	fprintf(fconfig,"issue=%c%c",48+object->issue,10);
 	fprintf(fconfig,"ntsc=%c%c",48+object->videosystem,10);
+	fprintf(fconfig,"se_basic=%c%c",48+object->se_basic,10);
 	fprintf(fconfig,"joystick1=%c%c",48+object->joystick[0],10);
 	fprintf(fconfig,"joystick2=%c%c",48+object->joystick[1],10);
 	fprintf(fconfig,"ay_sound=%c%c",48+object->ay_emul,10);
@@ -956,7 +957,7 @@ int load_config(struct computer *object, char *filename) {
 	unsigned char volume=255,mode128k=255,issue=255,ntsc=255, joystick1=255,joystick2=255,ay_emul=255,mdr_active=255,
 	dblscan=255,framerate =255, screen =255, text=255, precision=255, bw=255, tap_fast=255, audio_mode=255,
 	joypad1=255, joypad2=255, rumble1=255, rumble2=255, joy_n=255, key_n=255, port=255, autoconf=255, turbo=225, vk_auto=255, vk_rumble=255,
-	rewind_on_reset=255, pause_instant_load =255, ignore_z80_joy_conf=255, gui_sound=255, fuller_box_sound=255, currah_active = 255;
+	rewind_on_reset=255, pause_instant_load =255, ignore_z80_joy_conf=255, gui_sound=255, fuller_box_sound=255, currah_active = 255, se_basic =255;
 	
 	if (filename) strcpy(config_path,filename); 
 	else return -2;
@@ -1002,6 +1003,10 @@ int load_config(struct computer *object, char *filename) {
 			ntsc=line[5]-'0';
 			continue;
 		}
+		if (!strncmp(line,"se_basic=",9)) {
+			se_basic=line[9]-'0';
+			continue;
+		}
 		if (!strncmp(line,"joystick1=",10)) {
 			joystick1=line[10]-'0';
 			continue;
@@ -1131,6 +1136,9 @@ int load_config(struct computer *object, char *filename) {
 	if (ntsc<2) {
 		object->videosystem=ntsc;
 	}
+	if (se_basic<2) {
+		object->se_basic=se_basic;
+	}
 	if (joystick1<6) {
 		object->joystick[0]=joystick1;
 	}
diff --git a/src/gui_sdl.c b/src/gui_sdl.c
index 087caf3..7373d00 100644
--- a/src/gui_sdl.c
+++ b/src/gui_sdl.c
@@ -87,11 +87,14 @@ static const char *emulation_messages[] = {
 		/*03*/		"48K model",
 		/*04*/		"^|issue2|issue3",	
 		/*05*/		"  ",
-		/*06*/		"Frame rate",
-		/*07*/		"^|100%|50%|33%|25%|20%",
-		/*08*/		"  ",		
-		/*09*/		"Precision",
-		/*10*/		"^|on|off",	
+		/*06*/		"Open SE Basic",
+		/*07*/		"^|on|off",	
+		/*08*/		"  ",
+		/*09*/		"Frame rate",
+		/*10*/		"^|100%|50%|33%|25%|20%",
+		/*11*/		"  ",		
+		/*12*/		"Precision",
+		/*13*/		"^|on|off",	
 		NULL
 };
 
@@ -427,6 +430,7 @@ void create_tapfile_sdl() {
 static int manage_tape(int which)
 {
 	int retorno=0; //Stay in menu as default
+	unsigned char model128k;
 	switch (which)
 	{
 	case 0: //Insert
@@ -434,7 +438,15 @@ static int manage_tape(int which)
 		break;
 	case 1: //Emulate load ""
 		countdown_buffer=8;
-		switch (ordenador.mode128k)
+		model128k = ordenador.mode128k;
+	
+		if ((ordenador.mport1 & 0x10)&&(ordenador.mode128k!=4)) //ROM 48k 
+		model128k =0;
+	
+		if ((ordenador.mode128k==0)&&(ordenador.se_basic))
+		model128k =4;
+		
+		switch (model128k)
 		{
 		case 4://Spanish 128k
 			ordenador.keyboard_buffer[0][8]= SDLK_l;		
@@ -459,16 +471,6 @@ static int manage_tape(int which)
 		case 2: //+2
 		case 1: //128k
 			ordenador.kbd_buffer_pointer=2;
-			if (ordenador.mport1 & 0x10) //ROM 48k
-			{
-			ordenador.keyboard_buffer[0][5]= SDLK_j;		//Load
-			ordenador.keyboard_buffer[1][5]= 0;
-			ordenador.keyboard_buffer[0][4]= SDLK_p;		//"
-			ordenador.keyboard_buffer[1][4]= SDLK_LCTRL;
-			ordenador.keyboard_buffer[0][3]= SDLK_p;		//"
-			ordenador.keyboard_buffer[1][3]= SDLK_LCTRL;
-			ordenador.kbd_buffer_pointer=5;
-			}
 			ordenador.keyboard_buffer[0][2]= SDLK_RETURN;	// Return
 			ordenador.keyboard_buffer[1][2]= 0;
 			ordenador.keyboard_buffer[0][1]= SDLK_F6;		//F6 - play
@@ -588,7 +590,7 @@ static void set_machine_model(int which)
 
 static int emulation_settings(void)
 {
-	unsigned int submenus[4],submenus_old[4];
+	unsigned int submenus[5],submenus_old[5];
 	int opt, i, retorno;
 	unsigned char old_mode, old_videosystem;
 	
@@ -598,10 +600,11 @@ static int emulation_settings(void)
 	
 	submenus[0] = get_machine_model();
 	submenus[1] = ordenador.issue-2;
-	submenus[2] = jump_frames;
-	submenus[3] = !ordenador.precision;
+	submenus[2] = !ordenador.se_basic;
+	submenus[3] = jump_frames;
+	submenus[4] = !ordenador.precision;
 
-	for (i=0; i<4; i++) submenus_old[i] = submenus[i];
+	for (i=0; i<5; i++) submenus_old[i] = submenus[i];
 	old_mode=ordenador.mode128k;
 	old_videosystem = ordenador.videosystem;
 	
@@ -617,11 +620,15 @@ static int emulation_settings(void)
 	
 	if (ordenador.mode128k==0) ordenador.issue= submenus[1]+2; else ordenador.issue = 3;
 	
-	jump_frames = submenus[2];
+	ordenador.se_basic = !submenus[2];
 	
-	if (submenus[3] != submenus_old[3])
+	if (submenus[2]!=submenus_old[2]) {ResetComputer ();retorno=-2;}
+	
+	jump_frames = submenus[3];
+	
+	if (submenus[3] != submenus_old[4])
 	{
-	ordenador.precision = !submenus[3];
+	ordenador.precision = !submenus[4];
 	ordenador.precision_old=ordenador.precision;
 	if (ordenador.turbo_state!=1)  //Tape is not loading with auto mode
 	 if (ordenador.precision)
@@ -996,6 +1003,9 @@ void load_mdr_file(void)
 	if ((ordenador.mport1 & 0x10)&&(ordenador.mode128k!=4)) //ROM 48k 
 	model128k =0;
 	
+	if ((ordenador.mode128k==0)&&(ordenador.se_basic))
+	model128k =4;
+	
 	//Emulate load *"m";1;"run"
 		countdown_buffer=8;
 		ordenador.kbd_buffer_pointer=17;
@@ -1934,7 +1944,7 @@ static void save_load_general_configurations(int which)
 {
 
 	int retorno;
-	unsigned char old_bw,old_mode, old_currah;
+	unsigned char old_bw,old_mode, old_currah, old_se_basic;
 	char config_path[MAX_PATH_LENGTH];
 	int length;
 	FILE *fconfig; 
@@ -1963,10 +1973,12 @@ static void save_load_general_configurations(int which)
 				old_bw = ordenador.bw;
 				old_mode= ordenador.mode128k;
 				old_currah = ordenador.currah_active;
+				old_se_basic = ordenador.se_basic;
 				if (!load_config(&ordenador,config_path)) msgInfo("General confs loaded",3000,NULL);
 				if (old_bw!=ordenador.bw) computer_set_palete();
 				if (ordenador.currah_rom_unavailable) ordenador.currah_active =0;
-				if ((old_mode != ordenador.mode128k)||(old_currah != ordenador.currah_active)) ResetComputer();
+				if ((old_mode != ordenador.mode128k)||(old_currah != ordenador.currah_active)||
+					(old_se_basic != ordenador.se_basic)) ResetComputer();
 				break;
 			}
 			else // Delete config file