diff --git a/Cart_Reader/Cart_Reader.ino b/Cart_Reader/Cart_Reader.ino
index 80f9e95..f858900 100644
--- a/Cart_Reader/Cart_Reader.ino
+++ b/Cart_Reader/Cart_Reader.ino
@@ -62,6 +62,25 @@ char ver[5] = "5.3";
 // Enable the second button
 #define enable_Button2
 
+// define enable_XXX to enable
+#define enable_MD
+#define enable_SMS
+
+#define enable_PCE
+
+#define enable_NES
+#define enable_SNES
+#define enable_SV
+#define enable_NP
+#define enable_GBX
+#define enable_N64
+
+#define enable_WS
+
+#define enable_NGP
+
+#define enable_FLASH
+
 /******************************************
    Libraries
  *****************************************/
@@ -365,6 +384,56 @@ static const uint8_t PROGMEM sig [] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
+//******************************************
+// Data used by multiple modules
+//******************************************
+// CRC32 lookup table // 256 entries
+static const uint32_t crc_32_tab[] PROGMEM = { /* CRC polynomial 0xedb88320 */
+  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+  0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+  0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+  0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+  0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+  0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
+  0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+  0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+  0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
+  0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+  0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+  0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+  0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+  0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+  0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+  0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+  0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+  0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+  0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+  0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+  0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+  0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+  0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+  0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+  0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+  0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+  0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+  0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+  0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+  0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+  0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+  0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+  0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+  0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+  0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
 /******************************************
   Menu
 *****************************************/
@@ -453,21 +522,29 @@ void mainMenu() {
       addonsMenu();
       break;
 
+#ifdef enable_SNES
     case 1:
       snsMenu();
       break;
+#endif
 
+#ifdef enable_MD
     case 2:
       mdMenu();
       break;
+#endif
 
+#ifdef enable_N64
     case 3:
       n64Menu();
       break;
+#endif
 
+#ifdef enable_GBX
     case 4:
       gbxMenu();
       break;
+#endif
 
     case 5:
       aboutScreen();
@@ -490,35 +567,47 @@ void addonsMenu() {
   // wait for user choice to come back from the question box menu
   switch (addonsMenu)
   {
+#ifdef enable_NES
     case 0:
       nesMenu();
       break;
+#endif
 
+#ifdef enable_FLASH
     case 1:
       flashMenu();
       break;
+#endif
 
+#ifdef enable_PCE
     case 2:
       pcsMenu();
       break;
+#endif
 
+#ifdef enable_SMS
     case 3:
       smsMenu();
       break;
+#endif
 
+#ifdef enable_WS
     case 4:
       display_Clear();
       display_Update();
       setup_WS();
       mode = mode_WS;
       break;
+#endif
 
+#ifdef enable_NGP
     case 5:
       display_Clear();
       display_Update();
       setup_NGP();
       mode = mode_NGP;
       break;
+#endif
 
     case 6:
       resetArduino();
@@ -1137,10 +1226,13 @@ void wait_btn() {
     // get input button
     int b = checkButton();
 
+#ifdef enable_N64
     // Send some clock pulses to the Eeprom in case it locked up
     if ((mode == mode_N64_Cart) && ((saveType == 5) || (saveType == 6))) {
       pulseClock_N64(1);
     }
+#endif
+
     // if the cart readers input button is pressed shortly
     if (b == 1) {
       errorLvl = 0;
@@ -1468,15 +1560,22 @@ page:
   Main loop
 *****************************************/
 void loop() {
+#ifdef enable_N64
   if (mode == mode_N64_Controller) {
     n64ControllerMenu();
   }
   else if (mode == mode_N64_Cart) {
     n64CartMenu();
   }
+#else
+  if (1 == 0) { }
+#endif
+#ifdef enable_SNES
   else if (mode == mode_SNES) {
     snesMenu();
   }
+#endif
+#ifdef enable_FLASH
   else if (mode == mode_FLASH8) {
     flashromMenu8();
   }
@@ -1486,42 +1585,62 @@ void loop() {
   else if (mode == mode_EPROM) {
     epromMenu();
   }
+#endif
+#ifdef enable_NP
   else if (mode == mode_SFM) {
     sfmMenu();
   }
+#endif
+#ifdef enable_GBX
   else if (mode == mode_GB) {
     gbMenu();
   }
   else if (mode == mode_GBA) {
     gbaMenu();
   }
+#endif
+#ifdef enable_NP
   else if (mode == mode_SFM_Flash) {
     sfmFlashMenu();
   }
   else if (mode == mode_SFM_Game) {
     sfmGameOptions();
   }
+#endif
+#ifdef enable_GBX
   else if (mode == mode_GBM) {
     gbmMenu();
   }
+#endif
   else if (mode == mode_MD_Cart) {
     mdCartMenu();
   }
+#ifdef enable_PCE
   else if (mode == mode_PCE) {
     pceMenu();
   }
+#endif
+#ifdef enable_SV
   else if (mode == mode_SV) {
     svMenu();
   }
+#endif
+#ifdef enable_NES
   else if (mode == mode_NES) {
     nesMenu();
   }
+#endif
+#ifdef enable_SMS
   else if (mode == mode_SMS) {
     smsMenu();
   }
+#endif
+#ifdef enable_MD
   else if (mode == mode_SEGA_CD) {
     segaCDMenu();
   }
+#endif
+#ifdef enable_GBX
   else if (mode == mode_GB_GBSmart) {
     gbSmartMenu();
   }
@@ -1531,12 +1650,17 @@ void loop() {
   else if (mode == mode_GB_GBSmart_Game) {
     gbSmartGameOptions();
   }
+#endif
+#ifdef enable_WS
   else if (mode == mode_WS) {
     wsMenu();
   }
+#endif
+#ifdef enable_NGP
   else if (mode == mode_NGP) {
     ngpMenu();
   }
+#endif
   else {
     display_Clear();
     println_Msg(F("Menu Error"));
diff --git a/Cart_Reader/MD.ino b/Cart_Reader/MD.ino
index 7d1ad27..b61dabe 100644
--- a/Cart_Reader/MD.ino
+++ b/Cart_Reader/MD.ino
@@ -3,6 +3,8 @@
 //******************************************
 // Writes to Sega CD Backup RAM Cart require an extra wire from MRES (B02) to VRES (B27)
 
+#define enable_FLASH
+
 /******************************************
    Variables
  *****************************************/
@@ -136,6 +138,7 @@ void mdMenu() {
       mode =  mode_SEGA_CD;
       break;
 
+#ifdef enable_FLASH
     case 2:
       display_Clear();
       display_Update();
@@ -180,6 +183,7 @@ void mdMenu() {
       display_Update();
       wait();
       break;
+#endif
 
     case 3:
       resetArduino();
@@ -1089,6 +1093,7 @@ unsigned long verifySram_MD() {
   return writeErrors;
 }
 
+#ifdef enable_FLASH
 //******************************************
 // Flashrom Functions
 //******************************************
@@ -1275,6 +1280,7 @@ void verifyFlash_MD() {
     display_Update();
   }
 }
+#endif
 
 // Delay between write operations based on status register
 void busyCheck_MD() {
diff --git a/Cart_Reader/N64.ino b/Cart_Reader/N64.ino
index 41d14ff..ee88484 100644
--- a/Cart_Reader/N64.ino
+++ b/Cart_Reader/N64.ino
@@ -1643,53 +1643,6 @@ void printCartInfo_N64() {
   }
 }
 
-// CRC32 lookup table // 256 entries
-static const uint32_t crc_32_tab[] PROGMEM = { /* CRC polynomial 0xedb88320 */
-  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
-  0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
-  0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
-  0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
-  0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
-  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
-  0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
-  0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
-  0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
-  0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
-  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
-  0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
-  0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
-  0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
-  0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
-  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
-  0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
-  0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
-  0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
-  0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
-  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
-  0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
-  0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
-  0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
-  0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
-  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
-  0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
-  0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
-  0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
-  0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
-  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
-  0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
-  0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
-  0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
-  0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
-  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
-  0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
-  0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
-  0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
-  0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
-  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
-  0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
-  0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
-};
-
 // improved strcmp function that ignores case to prevent checksum comparison issues
 int strcicmp(char const * a, char const * b)
 {
diff --git a/Cart_Reader/NP.ino b/Cart_Reader/NP.ino
index 95bd8c5..4367b9d 100644
--- a/Cart_Reader/NP.ino
+++ b/Cart_Reader/NP.ino
@@ -3,6 +3,8 @@
 //******************************************
 //  (GB Memory starts at around line 1740)
 
+#define enable_FLASH
+
 /******************************************
    SF Memory Cassette
 ******************************************/
@@ -216,6 +218,7 @@ void sfmGameOptions() {
   }
 }
 
+#ifdef enable_FLASH
 void sfmFlashMenu() {
   // create menu with title and 6 options to choose from
   unsigned char flashSubMenu;
@@ -453,6 +456,7 @@ void sfmFlashMenu() {
     wait();
   }
 }
+#endif
 
 // Read the games from the menu area
 void getGames() {
diff --git a/Cart_Reader/SNES.ino b/Cart_Reader/SNES.ino
index 449d362..9bbba77 100644
--- a/Cart_Reader/SNES.ino
+++ b/Cart_Reader/SNES.ino
@@ -2,6 +2,8 @@
 // SUPER NINTENDO MODULE
 //******************************************
 
+#define enable_FLASH
+
 /******************************************
   Defines
  *****************************************/
@@ -86,6 +88,7 @@ void snsMenu() {
       mode = mode_SV;
       break;
 
+#ifdef enable_FLASH
     case 3:
       display_Clear();
       display_Update();
@@ -105,6 +108,7 @@ void snsMenu() {
       wait();
       mode = mode_FLASH8;
       break;
+#endif
 
     case 5:
       resetArduino();