diff --git a/src/.gitignore b/src/.gitignore
index 3d8486a..5887053 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -4,3 +4,4 @@
 *.o
 *.sym
 *.map
+dump.bin
diff --git a/src/game.c b/src/game.c
index 6ae70da..0d21a90 100644
--- a/src/game.c
+++ b/src/game.c
@@ -708,6 +708,6 @@ void wait_joystick_release(uint8_t joy_id) {
 
     do {
         read_joystick(joy_id, &joystat1, &joystat2, &joyconn);
-        sound_fill_buffers();
+        //sound_fill_buffers();
     } while(joystat1 != 0xFF || joystat2 != 0xFF);
 }
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 3419218..fcbb90e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -26,6 +26,7 @@
 #include "game.h"
 #include "menu.h"
 #include "mouse.h"
+#include "sound.h"
 
 unsigned char keycode;
 
@@ -34,13 +35,13 @@ void main() {
     init_screen();
     load_tiles();
 
-    // // enable mouse
-    init_mouse();
-
     // load sound engine
     init_sound();
     start_bgmusic();
 
+    // enable mouse
+    init_mouse();
+
     while(1) {
         while(gamestate == GAME_MENU) {
             clear_screen();
diff --git a/src/menu.c b/src/menu.c
index f4692f9..0146cba 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -48,7 +48,6 @@ void game_menu() {
     print_choice();
 
     while(1) {
-        // sample keyboard to make adjustments to the game settings
         asm("jsr $FFE4");
         asm("sta %v", keycode);
 
@@ -116,8 +115,8 @@ void game_menu() {
             return;
         }
 
-        asm("jsr $FF6B");
-        asm("sta %v", mouse_buttons);
+        // asm("jsr $FF6B");
+        // asm("sta %v", mouse_buttons);
 
         // update sound buffer
         sound_fill_buffers();
@@ -145,13 +144,13 @@ void print_choice() {
     // print board size
     switch(boardsize) {
         case 6:
-            memcpy(buf, "6 x 6  ", 7);
+            memcpy(buf, "6 x 6  ", 8);
         break;
         case 8:
-            memcpy(buf, "8 x 8  ", 7);
+            memcpy(buf, "8 x 8  ", 8);
         break;
         case 10:
-            memcpy(buf, "10 x 10", 7);
+            memcpy(buf, "10 x 10", 8);
         break;
     }
     write_string(buf, 9, 1);
diff --git a/src/menu.h b/src/menu.h
index 5862dd2..221d45b 100644
--- a/src/menu.h
+++ b/src/menu.h
@@ -27,6 +27,7 @@
 #include "video.h"
 #include "game.h"
 #include "mouse.h"
+#include "sound.h"
 
 /**
  * @brief Show game menu
diff --git a/src/mouse.h b/src/mouse.h
index 33fc544..d61592a 100644
--- a/src/mouse.h
+++ b/src/mouse.h
@@ -21,6 +21,6 @@
 #ifndef _MOUSE_H
 #define _MOUSE_H
 
-void init_mouse();
+void __fastcall__ init_mouse();
 
 #endif // _MOUSE_H
\ No newline at end of file
diff --git a/src/mouse.s b/src/mouse.s
index e0f7ac1..08f596d 100644
--- a/src/mouse.s
+++ b/src/mouse.s
@@ -22,6 +22,7 @@
 
 .export _init_mouse
 
+.code
 .proc _init_mouse: near
     sec
     jsr X16::Kernal::SCREEN_MODE
diff --git a/src/othello.cfg b/src/othello.cfg
index 374a536..2fdcbf6 100644
--- a/src/othello.cfg
+++ b/src/othello.cfg
@@ -16,20 +16,20 @@ MEMORY {
     BSS:      file = "",               start = __ONCE_RUN__,         size = __HIMEM__ - __ONCE_RUN__ - __STACKSIZE__;
 }
 SEGMENTS {
-    ZEROPAGE: load = ZP,       type = zp;
-    EXTZP:    load = ZP,       type = zp, optional = yes;
-    LOADADDR: load = LOADADDR, type = ro;
-    EXEHDR:   load = HEADER,   type = ro;
-    STARTUP:  load = MAIN,     type = ro, optional = yes;
-    LOWCODE:  load = MAIN,     type = ro, optional = yes;
-    CODE:     load = MAIN,     type = ro;
-    ZSMKITLIB:  load = MAIN,   type = ro;
-    ZSMKITBANK: load = HIRAM,  type = bss, define = yes;
-    RODATA:   load = MAIN,     type = ro;
-    DATA:     load = MAIN,     type = rw;
-    INIT:     load = MAIN,     type = rw, optional = yes; # uninitialized, but reserves output space
-    ONCE:     load = MAIN,     type = ro,                 define = yes;
-    BSS:      load = BSS,      type = bss,                define = yes;
+    ZEROPAGE:   load = ZP,          type = zp;
+    EXTZP:      load = ZP,          type = zp, optional = yes;
+    LOADADDR:   load = LOADADDR,    type = ro;
+    EXEHDR:     load = HEADER,      type = ro;
+    STARTUP:    load = MAIN,        type = ro, optional = yes;
+    LOWCODE:    load = MAIN,        type = ro, optional = yes;
+    CODE:       load = MAIN,        type = ro;
+    ZSMKITLIB:  load = MAIN,        type = ro;
+    ZSMKITBANK: load = HIRAM,       type = bss, define = yes;
+    RODATA:     load = MAIN,        type = ro;
+    DATA:       load = MAIN,        type = rw;
+    INIT:       load = MAIN,        type = rw, optional = yes; # uninitialized, but reserves output space
+    ONCE:       load = MAIN,        type = ro, define = yes;
+    BSS:        load = BSS,         type = bss, define = yes;
 }
 FEATURES {
     CONDES: type    = constructor,
diff --git a/src/run.sh b/src/run.sh
index 559618d..ef5d2cb 100644
--- a/src/run.sh
+++ b/src/run.sh
@@ -2,4 +2,4 @@
 #
 # This BASH file is made for MINGW64 BASH
 #
-../../emulator-win/x16emu.exe -prg OTHELLO.PRG -run
+../../emulator-win/x16emu.exe -c02 -prg OTHELLO.PRG -run -debug