diff --git a/Cart_Reader/Cart_Reader.ino b/Cart_Reader/Cart_Reader.ino
index 72b05d0..5475f88 100644
--- a/Cart_Reader/Cart_Reader.ino
+++ b/Cart_Reader/Cart_Reader.ino
@@ -431,7 +431,8 @@ bool errorLvl = 0;
 byte romVersion = 0;
 char cartID[5];
 unsigned long cartSize;
-char flashid[5];
+unsigned int flashid;
+char flashid_str[5];
 char vendorID[5];
 unsigned long fileSize;
 unsigned long sramBase;
diff --git a/Cart_Reader/FLASH.ino b/Cart_Reader/FLASH.ino
index 79697ab..cca8646 100644
--- a/Cart_Reader/FLASH.ino
+++ b/Cart_Reader/FLASH.ino
@@ -153,16 +153,16 @@ void flashromMenu8() {
           writeFlash29F032();
           break;
         case 2:
-          if (strcmp(flashid, "C2F3") == 0)
+          if (flashid == 0xC2F3)
             writeFlash29F1601();
-          else if ((strcmp(flashid, "C2F1") == 0) || (strcmp(flashid, "C2F9") == 0))
+          else if ((flashid == 0xC2F1) || (flashid == 0xC2F9))
             writeFlash29F1610();
-          else if ((strcmp(flashid, "C2C4") == 0) || (strcmp(flashid, "C249") == 0) || (strcmp(flashid, "C2A7") == 0) || (strcmp(flashid, "C2A8") == 0) || (strcmp(flashid, "C2C9") == 0) || (strcmp(flashid, "C2CB") == 0))
+          else if ((flashid == 0xC2C4) || (flashid == 0xC249) || (flashid == 0xC2A7) || (flashid == 0xC2A8) || (flashid == 0xC2C9) || (flashid == 0xC2CB))
             writeFlash29LV640();
-          else if (strcmp(flashid, "017E") == 0) {
+          else if (flashid == 0x017E) {
             // sector size, write buffer size
             writeFlash29GL(sectorSize, bufferSize);
-          } else if ((strcmp(flashid, "0458") == 0) || (strcmp(flashid, "0158") == 0) || (strcmp(flashid, "01AB") == 0))
+          } else if ((flashid == 0x0458) || (flashid == 0x0158) || (flashid == 0x01AB))
             writeFlash29F800();
 
           break;
@@ -271,9 +271,9 @@ void flashromMenu16() {
       fileBrowser(F("Select file"));
       display_Clear();
       time = millis();
-      if (strcmp(flashid, "C2F3") == 0) {
+      if (flashid == 0xC2F3) {
         writeFlash16_29F1601();
-      } else if ((strcmp(flashid, "C2C4") == 0) || (strcmp(flashid, "C249") == 0) || (strcmp(flashid, "C2A7") == 0) || (strcmp(flashid, "C2A8") == 0) || (strcmp(flashid, "C2C9") == 0) || (strcmp(flashid, "C2CB") == 0) || (strcmp(flashid, "C2FC") == 0)) {
+      } else if ((flashid == 0xC2C4) || (flashid == 0xC249) || (flashid == 0xC2A7) || (flashid == 0xC2A8) || (flashid == 0xC2C9) || (flashid == 0xC2CB) || (flashid == 0xC2FC)) {
         writeFlash16_29LV640();
       } else {
         writeFlash16();
@@ -404,77 +404,77 @@ idtheflash:
   println_Msg("");
   println_Msg("");
   print_Msg(F("Flash ID: "));
-  println_Msg(flashid);
+  println_Msg(flashid_str);
 
-  if (strcmp(flashid, "C2F1") == 0) {
+  if (flashid == 0xC2F1) {
     println_Msg(F("MX29F1610 detected"));
     flashSize = 2097152;
     flashromType = 2;
-  } else if (strcmp(flashid, "C2F3") == 0) {
+  } else if (flashid == 0xC2F3) {
     println_Msg(F("MX29F1601 detected"));
     flashSize = 2097152;
     flashromType = 2;
-  } else if (strcmp(flashid, "C2F9") == 0) {
+  } else if (flashid == 0xC2F9) {
     println_Msg(F("MX29L3211 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 4194304;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2C4") == 0) || (strcmp(flashid, "C249") == 0)) {
+  } else if ((flashid == 0xC2C4) || (flashid == 0xC249)) {
     println_Msg(F("MX29LV160 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 2097152;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2A7") == 0) || (strcmp(flashid, "C2A8") == 0)) {
+  } else if ((flashid == 0xC2A7) || (flashid == 0xC2A8)) {
     println_Msg(F("MX29LV320 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 4194304;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2C9") == 0) || (strcmp(flashid, "C2CB") == 0)) {
+  } else if ((flashid == 0xC2C9) || (flashid == 0xC2CB)) {
     println_Msg(F("MX29LV640 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 8388608;
     flashromType = 2;
-  } else if (strcmp(flashid, "0141") == 0) {
+  } else if (flashid == 0x0141) {
     println_Msg(F("AM29F032B detected"));
     flashSize = 4194304;
     flashromType = 1;
-  } else if (strcmp(flashid, "01AD") == 0) {
+  } else if (flashid == 0x01AD) {
     println_Msg(F("AM29F016B detected"));
     flashSize = 2097152;
     flashromType = 1;
-  } else if (strcmp(flashid, "20AD") == 0) {
+  } else if (flashid == 0x20AD) {
     println_Msg(F("AM29F016D detected"));
     flashSize = 2097152;
     flashromType = 1;
-  } else if (strcmp(flashid, "04AD") == 0) {
+  } else if (flashid == 0x04AD) {
     println_Msg(F("AM29F016D detected"));
     flashSize = 2097152;
     flashromType = 1;
-  } else if (strcmp(flashid, "04D4") == 0) {
+  } else if (flashid == 0x04D4) {
     println_Msg(F("MBM29F033C detected"));
     flashSize = 4194304;
     flashromType = 1;
-  } else if (strcmp(flashid, "04D5") == 0) {
+  } else if (flashid == 0x04D5) {
     println_Msg(F("MBM29F080C detected"));
     flashSize = 1048576;
     flashromType = 1;
-  } else if (strcmp(flashid, "0458") == 0) {
+  } else if (flashid == 0x0458) {
     println_Msg(F("MBM29F800BA detected"));
     flashSize = 1048576;
     flashromType = 2;
-  } else if (strcmp(flashid, "01AB") == 0) {
+  } else if (flashid == 0x01AB) {
     println_Msg(F("AM29F400AB detected"));
     flashSize = 131072 * 4;
     flashromType = 2;
-  } else if (strcmp(flashid, "0158") == 0) {
+  } else if (flashid == 0x0158) {
     println_Msg(F("AM29F800BB detected"));
     flashSize = 1048576;
     flashromType = 2;
-  } else if (strcmp(flashid, "01A3") == 0) {
+  } else if (flashid == 0x01A3) {
     println_Msg(F("AM29LV033C detected"));
     flashSize = 131072 * 32;
     flashromType = 1;
-  } else if (strcmp(flashid, "017E") == 0) {
+  } else if (flashid == 0x017E) {
     // S29GL032M
     if (readByte_Flash(28) == 0x1A) {
       println_Msg(F("S29GL032M detected"));
@@ -498,7 +498,7 @@ idtheflash:
     }
     println_Msg(F("ATTENTION 3.3V"));
     flashromType = 2;
-  } else if (strcmp(flashid, "B088") == 0) {
+  } else if (flashid == 0xB088) {
     // LH28F016SUT
     println_Msg(F("LH28F016SUT detected"));
     println_Msg(F("ATTENTION 3/5 setting"));
@@ -506,20 +506,20 @@ idtheflash:
     sectorSize = 65536;
     bufferSize = 256;
     flashromType = 3;
-  } else if ((strcmp(flashid, "8916") == 0) || (strcmp(flashid, "8917") == 0) || (strcmp(flashid, "8918") == 0)) {
+  } else if ((flashid == 0x8916) || (flashid == 0x8917) || (flashid == 0x8918)) {
     // E28FXXXJ3A
     print_Msg(F("E28F"));
 
-    switch (flashid[3]) {
-      case '6':
+    switch (flashid & 0x00f0) {
+      case 0x60:
         flashSize = 131072 * 32;
         print_Msg(F("320"));
         break;
-      case '7':
+      case 0x70:
         flashSize = 131072 * 64;
         print_Msg(F("640"));
         break;
-      case '8':
+      case 0x80:
         flashSize = 131072 * 128;
         print_Msg(F("128"));
         break;
@@ -537,7 +537,7 @@ idtheflash:
     goto idtheflash;
   } else if (secondID == 2) {
     // Backup first ID read-out
-    strncpy(vendorID, flashid, 5);
+    strncpy(vendorID, flashid_str, 5);
 
     // Read ID a third time using a different command (type 2 flashrom)
     resetFlash8();
@@ -552,7 +552,7 @@ idtheflash:
     print_Msg(F("ID Type 1: "));
     println_Msg(vendorID);
     print_Msg(F("ID Type 2: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     println_Msg("");
     println_Msg(F("UNKNOWN FLASHROM"));
     println_Msg("");
@@ -588,37 +588,37 @@ void id_Flash16() {
   println_Msg(F("Flashrom Writer 16bit"));
   println_Msg("");
   print_Msg(F("Flash ID: "));
-  println_Msg(flashid);
-  if (strcmp(flashid, "C2F1") == 0) {
+  println_Msg(flashid_str);
+  if (flashid == 0xC2F1) {
     println_Msg(F("MX29F1610 detected"));
     println_Msg("");
     flashSize = 2097152;
     flashromType = 2;
-  } else if (strcmp(flashid, "C2F3") == 0) {
+  } else if (flashid == 0xC2F3) {
     println_Msg(F("MX29F1601 detected"));
     flashSize = 2097152;
     flashromType = 2;
-  } else if (strcmp(flashid, "C2F9") == 0) {
+  } else if (flashid == 0xC2F9) {
     println_Msg(F("MX29L3211 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 4194304;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2C4") == 0) || (strcmp(flashid, "C249") == 0)) {
+  } else if ((flashid == 0xC2C4) || (flashid == 0xC249)) {
     println_Msg(F("MX29LV160 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 2097152;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2A7") == 0) || (strcmp(flashid, "C2A8") == 0)) {
+  } else if ((flashid == 0xC2A7) || (flashid == 0xC2A8)) {
     println_Msg(F("MX29LV320 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 4194304;
     flashromType = 2;
-  } else if ((strcmp(flashid, "C2C9") == 0) || (strcmp(flashid, "C2CB") == 0)) {
+  } else if ((flashid == 0xC2C9) || (flashid == 0xC2CB)) {
     println_Msg(F("MX29LV640 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 8388608;
     flashromType = 2;
-  } else if (strcmp(flashid, "C2FC") == 0) {
+  } else if (flashid == 0xC2FC) {
     println_Msg(F("MX26L6420 detected"));
     println_Msg(F("ATTENTION 3.3V"));
     flashSize = 8388608;
@@ -1008,7 +1008,9 @@ void idFlash29F032() {
   dataIn8();
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readByte_Flash(0), readByte_Flash(1));
+  flashid = readByte_Flash(0) << 8;
+  flashid |= readByte_Flash(1);
+  sprintf(flashid_str, "%04X", flashid);
 }
 
 void eraseFlash29F032() {
@@ -1306,7 +1308,9 @@ void idFlash29F1610() {
   dataIn8();
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readByte_Flash(0), readByte_Flash(2));
+  flashid = readByte_Flash(0) << 8;
+  flashid |= readByte_Flash(2);
+  sprintf(flashid_str, "%04X", flashid);
 }
 
 byte readStatusReg() {
@@ -1547,7 +1551,9 @@ void idFlash28FXXX() {
   dataIn8();
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readByte_Flash(0), readByte_Flash(1));
+  flashid = readByte_Flash(0) << 8;
+  flashid |= readByte_Flash(1);
+  sprintf(flashid_str, "%04X", flashid);
 }
 
 void resetFlash28FXXX() {
@@ -1590,9 +1596,9 @@ void writeFlash28FXXX() {
 
   // Open file on sd card
   if (myFile.open(filePath, O_READ)) {
-    if ((strcmp(flashid, "B088") == 0))
+    if ((flashid == 0xB088))
       writeFlashLH28F0XX();
-    else if ((strcmp(flashid, "8916") == 0) || (strcmp(flashid, "8917") == 0) || (strcmp(flashid, "8918") == 0)) {
+    else if ((flashid == 0x8916) || (flashid == 0x8917) || (flashid == 0x8918)) {
       writeFlashE28FXXXJ3A();
     }
 
@@ -1969,7 +1975,9 @@ void idFlash16() {
   dataIn16();
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readWord_Flash(0) & 0xFF, readWord_Flash(1) & 0xFF);
+  flashid = (readWord_Flash(0) & 0xFF) << 8;
+  flashid |= readWord_Flash(1) & 0xFF;
+  sprintf(flashid_str, "%04X", flashid);
 }
 
 byte readStatusReg16() {
diff --git a/Cart_Reader/GB.ino b/Cart_Reader/GB.ino
index c4cc36d..c0e9f1c 100644
--- a/Cart_Reader/GB.ino
+++ b/Cart_Reader/GB.ino
@@ -1608,33 +1608,34 @@ void writeFlash29F_GB(byte MBC, boolean flashErase) {
     writeByte_GB(0x555, 0x90);
 
     // Read the two id bytes into a string
-    sprintf(flashid, "%02X%02X", readByte_GB(0), readByte_GB(1));
+    flashid = readByte_GB(0) << 8;
+    flashid |= readByte_GB(1);
 
-    if (strcmp(flashid, "04D4") == 0) {
+    if (flashid == 0x04D4) {
       println_Msg(F("MBM29F033C"));
       print_Msg(F("Banks: "));
       print_Msg(romBanks);
       println_Msg(F("/256"));
       display_Update();
-    } else if (strcmp(flashid, "0141") == 0) {
+    } else if (flashid == 0x0141) {
       println_Msg(F("AM29F032B"));
       print_Msg(F("Banks: "));
       print_Msg(romBanks);
       println_Msg(F("/256"));
       display_Update();
-    } else if (strcmp(flashid, "01AD") == 0) {
+    } else if (flashid == 0x01AD) {
       println_Msg(F("AM29F016B"));
       print_Msg(F("Banks: "));
       print_Msg(romBanks);
       println_Msg(F("/128"));
       display_Update();
-    } else if (strcmp(flashid, "04AD") == 0) {
+    } else if (flashid == 0x04AD) {
       println_Msg(F("AM29F016D"));
       print_Msg(F("Banks: "));
       print_Msg(romBanks);
       println_Msg(F("/128"));
       display_Update();
-    } else if (strcmp(flashid, "01D5") == 0) {
+    } else if (flashid == 0x01D5) {
       println_Msg(F("AM29F080B"));
       print_Msg(F("Banks: "));
       print_Msg(romBanks);
@@ -1642,7 +1643,8 @@ void writeFlash29F_GB(byte MBC, boolean flashErase) {
       display_Update();
     } else {
       print_Msg(F("Flash ID: "));
-      println_Msg(flashid);
+      sprintf(flashid_str, "%04X", flashid);
+      println_Msg(flashid_str);
       display_Update();
       print_Error(F("Unknown flashrom"), true);
     }
diff --git a/Cart_Reader/GBA.ino b/Cart_Reader/GBA.ino
index 78d216f..21ff4f4 100644
--- a/Cart_Reader/GBA.ino
+++ b/Cart_Reader/GBA.ino
@@ -344,16 +344,16 @@ void gbaMenu() {
           resetFLASH_GBA();
 
           print_Msg(F("FLASH ID: "));
-          println_Msg(flashid);
+          println_Msg(flashid_str);
           println_Msg(F(""));
           println_Msg(F("FLASH Type: "));
-          if (strcmp(flashid, "1F3D") == 0) {
+          if (flashid == 0x1F3D) {
             println_Msg(F("Atmel AT29LV512"));
-          } else if (strcmp(flashid, "BFD4") == 0) {
+          } else if (flashid == 0xBFD4) {
             println_Msg(F("SST 39VF512"));
-          } else if (strcmp(flashid, "C21C") == 0) {
+          } else if (flashid == 0xC21C) {
             println_Msg(F("Macronix MX29L512"));
-          } else if (strcmp(flashid, "321B") == 0) {
+          } else if (flashid == 0x321B) {
             println_Msg(F("Panasonic MN63F805MNP"));
           } else {
             println_Msg(F("Unknown"));
@@ -367,7 +367,7 @@ void gbaMenu() {
           display_Clear();
           display_Update();
 
-          if (strcmp(flashid, "1F3D") == 0) {  // Atmel
+          if (flashid == 0x1F3D) {  // Atmel
             writeFLASH_GBA(1, 65536, 0, 1);
             verifyFLASH_GBA(65536, 0);
           } else {
@@ -390,12 +390,12 @@ void gbaMenu() {
           resetFLASH_GBA();
 
           print_Msg(F("Flashrom ID: "));
-          println_Msg(flashid);
+          println_Msg(flashid_str);
           println_Msg(F(""));
           println_Msg(F("Flashrom Type: "));
-          if (strcmp(flashid, "C209") == 0) {
+          if (flashid == 0xC209) {
             println_Msg(F("Macronix MX29L010"));
-          } else if (strcmp(flashid, "6213") == 0) {
+          } else if (flashid == 0x6213) {
             println_Msg(F("SANYO LE26FV10N1TS"));
           } else {
             println_Msg(F("Unknown"));
@@ -1584,7 +1584,9 @@ void idFlash_GBA() {
           "nop\n\t");
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readByteFlash_GBA(0), readByteFlash_GBA(1));
+  flashid = readByteFlash_GBA(0) << 8;
+  flashid |= readByteFlash_GBA(1);
+  sprintf(flashid_str, "%04X", flashid);
 
   // Set CS_FLASH(PH0) high
   PORTH |= (1 << 0);
@@ -2354,10 +2356,12 @@ void idFlashrom_GBA() {
           "nop\n\t");
 
   // Read flashrom ID
-  sprintf(flashid, "%02X%02X", ((readWord_GBA(0x2) >> 8) & 0xFF), (readWord_GBA(0x4) & 0xFF));
+  flashid = readWord_GBA(0x2) & 0xFF00;
+  flashid |= readWord_GBA(0x4) & 0xFF;
+  sprintf(flashid_str, "%04X", flashid);
 
   // Intel Strataflash
-  if (strcmp(flashid, "8802") == 0 || (strcmp(flashid, "8816") == 0)) {
+  if (flashid == 0x8802 || (flashid == 0x8816)) {
     cartSize = 0x2000000;
   } else {
     // Send swapped MX29GL128E/MSP55LV128 ID command to flashrom
@@ -2374,10 +2378,11 @@ void idFlashrom_GBA() {
             "nop\n\t");
 
     // Read flashrom ID
-    sprintf(flashid, "%02X%02X", ((readWord_GAB(0x2) >> 8) & 0xFF), (readWord_GAB(0x2) & 0xFF));
+    flashid = readWord_GAB(0x2);
+    sprintf(flashid_str, "%04X", flashid);
 
     // MX29GL128E or MSP55LV128
-    if (strcmp(flashid, "227E") == 0) {
+    if (flashid == 0x227E) {
       // MX is 0xC2 and MSP is 0x4 or 0x1
       romType = (readWord_GAB(0x0) & 0xFF);
       cartSize = 0x1000000;
@@ -2387,7 +2392,7 @@ void idFlashrom_GBA() {
       println_Msg(F(""));
       println_Msg(F("Unknown Flash"));
       print_Msg(F("Flash ID: "));
-      println_Msg(flashid);
+      println_Msg(flashid_str);
       println_Msg(F(""));
       print_Error(F("Check voltage"), true);
     }
@@ -2796,14 +2801,14 @@ void flashRepro_GBA() {
   // Check flashrom ID's
   idFlashrom_GBA();
 
-  if ((strcmp(flashid, "8802") == 0) || (strcmp(flashid, "8816") == 0) || (strcmp(flashid, "227E") == 0)) {
+  if ((flashid == 0x8802) || (flashid == 0x8816) || (flashid == 0x227E)) {
     print_Msg(F("ID: "));
-    print_Msg(flashid);
+    print_Msg(flashid_str);
     print_Msg(F(" Size: "));
     print_Msg(cartSize / 0x100000);
     println_Msg(F("MB"));
     // MX29GL128E or MSP55LV128(N)
-    if (strcmp(flashid, "227E") == 0) {
+    if (flashid == 0x227E) {
       // MX is 0xC2 and MSP55LV128 is 0x4 and MSP55LV128N 0x1
       if (romType == 0xC2) {
         println_Msg(F("Macronix MX29GL128E"));
@@ -2820,11 +2825,11 @@ void flashRepro_GBA() {
       }
     }
     // Intel 4000L0YBQ0
-    else if (strcmp(flashid, "8802") == 0) {
+    else if (flashid == 0x8802) {
       println_Msg(F("Intel 4000L0YBQ0"));
     }
     // Intel 4400L0ZDQ0
-    else if (strcmp(flashid, "8816") == 0) {
+    else if (flashid == 0x8816) {
       println_Msg(F("Intel 4400L0ZDQ0"));
     }
     println_Msg("");
@@ -2857,17 +2862,17 @@ void flashRepro_GBA() {
       display_Update();
 
       // Erase needed sectors
-      if (strcmp(flashid, "8802") == 0) {
+      if (flashid == 0x8802) {
         println_Msg(F("Erasing..."));
         display_Update();
         eraseIntel4000_GBA();
         resetIntel_GBA(0x200000);
-      } else if (strcmp(flashid, "8816") == 0) {
+      } else if (flashid == 0x8816) {
         println_Msg(F("Erasing..."));
         display_Update();
         eraseIntel4400_GBA();
         resetIntel_GBA(0x200000);
-      } else if (strcmp(flashid, "227E") == 0) {
+      } else if (flashid == 0x227E) {
         //if (sectorCheckMX29GL128E_GBA()) {
         //print_Error(F("Sector Protected"), true);
         //}
@@ -2895,9 +2900,9 @@ void flashRepro_GBA() {
       print_Msg(F("Writing "));
       println_Msg(filePath);
       display_Update();
-      if ((strcmp(flashid, "8802") == 0) || (strcmp(flashid, "8816") == 0)) {
+      if ((flashid == 0x8802) || (flashid == 0x8816)) {
         writeIntel4000_GBA();
-      } else if (strcmp(flashid, "227E") == 0) {
+      } else if (flashid == 0x227E) {
         if ((romType == 0xC2) || (romType == 0x89) || (romType == 0x20)) {
           //MX29GL128E (0xC2)
           //PC28F256M29 (0x89)
@@ -2914,7 +2919,7 @@ void flashRepro_GBA() {
       // Verify
       print_STR(verifying_STR, 0);
       display_Update();
-      if (strcmp(flashid, "8802") == 0) {
+      if (flashid == 0x8802) {
         // Don't know the correct size so just take some guesses
         resetIntel_GBA(0x8000);
         delay(1000);
@@ -2922,12 +2927,12 @@ void flashRepro_GBA() {
         delay(1000);
         resetIntel_GBA(0x200000);
         delay(1000);
-      } else if (strcmp(flashid, "8816") == 0) {
+      } else if (flashid == 0x8816) {
         resetIntel_GBA(0x200000);
         delay(1000);
       }
 
-      else if (strcmp(flashid, "227E") == 0) {
+      else if (flashid == 0x227E) {
         resetMX29GL128E_GBA();
         delay(1000);
       }
@@ -2951,7 +2956,7 @@ void flashRepro_GBA() {
     println_Msg(F(""));
     println_Msg(F("Unknown Flash"));
     print_Msg(F("Flash ID: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     println_Msg(F(""));
     print_Error(F("Check voltage"), true);
   }
diff --git a/Cart_Reader/GBM.ino b/Cart_Reader/GBM.ino
index 1463059..53e5db8 100644
--- a/Cart_Reader/GBM.ino
+++ b/Cart_Reader/GBM.ino
@@ -496,16 +496,18 @@ boolean readFlashID_GBM() {
   send_GBM(0x0F, 0x5555, 0x90);
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readByte_GBM(0), readByte_GBM(1));
-  if (strcmp(flashid, "C289") == 0) {
+  flashid = readByte_GBM(0) << 8;
+  flashid |= readByte_GBM(1);
+  sprintf(flashid_str, "%04X", flashid);
+  if (flashid == 0xC289) {
     print_Msg(F("Flash ID: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     display_Update();
     resetFlash_GBM();
     return 1;
   } else {
     print_Msg(F("Flash ID: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     print_Error(F("Unknown Flash ID"), true);
     resetFlash_GBM();
     return 0;
diff --git a/Cart_Reader/MD.ino b/Cart_Reader/MD.ino
index 43bc439..07f239c 100644
--- a/Cart_Reader/MD.ino
+++ b/Cart_Reader/MD.ino
@@ -254,8 +254,8 @@ void mdMenu() {
       idFlash_MD();
       resetFlash_MD();
       print_Msg(F("Flash ID: "));
-      println_Msg(flashid);
-      if (strcmp(flashid, "C2F1") == 0) {
+      println_Msg(flashid_str);
+      if (flashid == 0xC2F1) {
         println_Msg(F("MX29F1610 detected"));
         flashSize = 2097152;
       } else {
@@ -1708,7 +1708,9 @@ void idFlash_MD() {
   dataIn_MD();
 
   // Read the two id bytes into a string
-  sprintf(flashid, "%02X%02X", readFlash_MD(0) & 0xFF, readFlash_MD(1) & 0xFF);
+  flashid = (readFlash_MD(0) & 0xFF) << 8;
+  flashid |= readFlash_MD(1) & 0xFF;
+  sprintf(flashid_str, "%04X", flashid);
 }
 
 byte readStatusReg_MD() {
diff --git a/Cart_Reader/N64.ino b/Cart_Reader/N64.ino
index 8b6ee62..e2d97ec 100644
--- a/Cart_Reader/N64.ino
+++ b/Cart_Reader/N64.ino
@@ -3647,34 +3647,34 @@ void flashRepro_N64() {
   // If the ID is known continue
   if (cartSize != 0) {
     // Print flashrom name
-    if ((strcmp(flashid, "227E") == 0) && (strcmp(cartID, "2201") == 0)) {
+    if ((flashid == 0x227E) && (strcmp(cartID, "2201") == 0)) {
       print_Msg(F("Spansion S29GL256N"));
       if (cartSize == 64)
         println_Msg(F(" x2"));
       else
         println_Msg("");
-    } else if ((strcmp(flashid, "227E") == 0) && (strcmp(cartID, "2101") == 0)) {
+    } else if ((flashid == 0x227E) && (strcmp(cartID, "2101") == 0)) {
       print_Msg(F("Spansion S29GL128N"));
-    } else if ((strcmp(flashid, "227E") == 0) && (strcmp(cartID, "2100") == 0)) {
+    } else if ((flashid == 0x227E) && (strcmp(cartID, "2100") == 0)) {
       print_Msg(F("ST M29W128GL"));
-    } else if ((strcmp(flashid, "22C9") == 0) || (strcmp(flashid, "22CB") == 0)) {
+    } else if ((flashid == 0x22C9) || (flashid == 0x22CB)) {
       print_Msg(F("Macronix MX29LV640"));
       if (cartSize == 16)
         println_Msg(F(" x2"));
       else
         println_Msg("");
-    } else if (strcmp(flashid, "8816") == 0)
+    } else if (flashid == 0x8816)
       println_Msg(F("Intel 4400L0ZDQ0"));
-    else if (strcmp(flashid, "7E7E") == 0)
+    else if (flashid == 0x7E7E)
       println_Msg(F("Fujitsu MSP55LV100S"));
-    else if ((strcmp(flashid, "227E") == 0) && (strcmp(cartID, "2301") == 0))
+    else if ((flashid == 0x227E) && (strcmp(cartID, "2301") == 0))
       println_Msg(F("Fujitsu MSP55LV512"));
-    else if ((strcmp(flashid, "227E") == 0) && (strcmp(cartID, "3901") == 0))
+    else if ((flashid == 0x227E) && (strcmp(cartID, "3901") == 0))
       println_Msg(F("Intel 512M29EW"));
 
     // Print info
     print_Msg(F("ID: "));
-    print_Msg(flashid);
+    print_Msg(flashid_str);
     print_Msg(F(" Size: "));
     print_Msg(cartSize);
     println_Msg(F("MB"));
@@ -3692,7 +3692,7 @@ void flashRepro_N64() {
     print_Msg(F("ID: "));
     print_Msg(vendorID);
     print_Msg(F(" "));
-    print_Msg(flashid);
+    print_Msg(flashid_str);
     print_Msg(F(" "));
     println_Msg(cartID);
     println_Msg(F(" "));
@@ -3706,7 +3706,8 @@ void flashRepro_N64() {
 
     // clear IDs
     sprintf(vendorID, "%s", "CONF");
-    sprintf(flashid, "%s", "CONF");
+    flashid = 0;
+    sprintf(flashid_str, "%s", "CONF");
     sprintf(cartID, "%s", "CONF");
 
 
@@ -3834,17 +3835,17 @@ void flashRepro_N64() {
     }
 
     // Erase needed sectors
-    if (strcmp(flashid, "227E") == 0) {
+    if (flashid == 0x227E) {
       // Spansion S29GL256N or Fujitsu MSP55LV512 with 0x20000 sector size and 32 byte buffer
       eraseSector_N64(0x20000);
-    } else if (strcmp(flashid, "7E7E") == 0) {
+    } else if (flashid == 0x7E7E) {
       // Fujitsu MSP55LV100S
       eraseMSP55LV100_N64();
-    } else if ((strcmp(flashid, "8813") == 0) || (strcmp(flashid, "8816") == 0)) {
+    } else if ((flashid == 0x8813) || (flashid == 0x8816)) {
       // Intel 4400L0ZDQ0
       eraseIntel4400_N64();
       resetIntel4400_N64();
-    } else if ((strcmp(flashid, "22C9") == 0) || (strcmp(flashid, "22CB") == 0)) {
+    } else if ((flashid == 0x22C9) || (flashid == 0x22CB)) {
       // Macronix MX29LV640, C9 is top boot and CB is bottom boot block
       eraseSector_N64(0x8000);
     } else {
@@ -3859,22 +3860,22 @@ void flashRepro_N64() {
       println_Msg(filePath);
       display_Update();
 
-      if ((strcmp(cartID, "3901") == 0) && (strcmp(flashid, "227E") == 0)) {
+      if ((strcmp(cartID, "3901") == 0) && (flashid == 0x227E)) {
         // Intel 512M29EW(64MB) with 0x20000 sector size and 128 byte buffer
         writeFlashBuffer_N64(0x20000, 128);
-      } else if ((strcmp(cartID, "2100") == 0) && (strcmp(flashid, "227E") == 0)) {
+      } else if ((strcmp(cartID, "2100") == 0) && (flashid == 0x227E)) {
         // ST M29W128GH(16MB) with 0x20000 sector size and 64 byte buffer
         writeFlashBuffer_N64(0x20000, 64);
-      } else if (strcmp(flashid, "227E") == 0) {
+      } else if (flashid == 0x227E) {
         // Spansion S29GL128N/S29GL256N or Fujitsu MSP55LV512 with 0x20000 sector size and 32 byte buffer
         writeFlashBuffer_N64(0x20000, 32);
-      } else if (strcmp(flashid, "7E7E") == 0) {
+      } else if (flashid == 0x7E7E) {
         //Fujitsu MSP55LV100S
         writeMSP55LV100_N64(0x20000);
-      } else if ((strcmp(flashid, "22C9") == 0) || (strcmp(flashid, "22CB") == 0)) {
+      } else if ((flashid == 0x22C9) || (flashid == 0x22CB)) {
         // Macronix MX29LV640 without buffer and 0x8000 sector size
         writeFlashrom_N64(0x8000);
-      } else if ((strcmp(flashid, "8813") == 0) || (strcmp(flashid, "8816") == 0)) {
+      } else if ((flashid == 0x8813) || (flashid == 0x8816)) {
         // Intel 4400L0ZDQ0
         writeIntel4400_N64();
         resetIntel4400_N64();
@@ -3956,13 +3957,14 @@ void idFlashrom_N64() {
   setAddress_N64(romBase);
   sprintf(vendorID, "%02X", readWord_N64());
   // Read 2 bytes flashrom ID
-  sprintf(flashid, "%04X", readWord_N64());
+  flashid = readWord_N64();
+  sprintf(flashid_str, "%04X", flashid);
   // Read 2 bytes secondary flashrom ID
   setAddress_N64(romBase + 0x1C);
   sprintf(cartID, "%04X", ((readWord_N64() << 8) | (readWord_N64() & 0xFF)));
 
   // Spansion S29GL256N(32MB/64MB) with either one or two flashrom chips
-  if ((strcmp(cartID, "2201") == 0) && (strcmp(flashid, "227E") == 0)) {
+  if ((strcmp(cartID, "2201") == 0) && (flashid == 0x227E)) {
     cartSize = 32;
 
     // Reset flashrom
@@ -3991,7 +3993,7 @@ void idFlashrom_N64() {
   }
 
   // Macronix MX29LV640(8MB/16MB) with either one or two flashrom chips
-  else if ((strcmp(flashid, "22C9") == 0) || (strcmp(flashid, "22CB") == 0)) {
+  else if ((flashid == 0x22C9) || (flashid == 0x22CB)) {
     cartSize = 8;
 
     resetFlashrom_N64(romBase + 0x800000);
@@ -4019,7 +4021,7 @@ void idFlashrom_N64() {
   }
 
   // Intel 4400L0ZDQ0 (64MB)
-  else if (strcmp(flashid, "8816") == 0) {
+  else if (flashid == 0x8816) {
     // Found first flashrom chip, set to 32MB
     cartSize = 32;
     resetIntel4400_N64();
@@ -4039,7 +4041,8 @@ void idFlashrom_N64() {
     sprintf(cartID, "%04X", readWord_N64());
     if (strcmp(cartID, "8813") == 0) {
       cartSize = 64;
-      strncpy(flashid, cartID, 5);
+      flashid = 0x8813;
+      strncpy(flashid_str, cartID, 5);
     }
     resetIntel4400_N64();
     // Empty cartID string
@@ -4047,35 +4050,35 @@ void idFlashrom_N64() {
   }
 
   //Fujitsu MSP55LV512/Spansion S29GL512N (64MB)
-  else if ((strcmp(cartID, "2301") == 0) && (strcmp(flashid, "227E") == 0)) {
+  else if ((strcmp(cartID, "2301") == 0) && (flashid == 0x227E)) {
     cartSize = 64;
     // Reset flashrom
     resetFlashrom_N64(romBase);
   }
 
   // Spansion S29GL128N(16MB) with one flashrom chip
-  else if ((strcmp(cartID, "2101") == 0) && (strcmp(flashid, "227E") == 0)) {
+  else if ((strcmp(cartID, "2101") == 0) && (flashid == 0x227E)) {
     cartSize = 16;
     // Reset flashrom
     resetFlashrom_N64(romBase);
   }
 
   // ST M29W128GL(16MB) with one flashrom chip
-  else if ((strcmp(cartID, "2100") == 0) && (strcmp(flashid, "227E") == 0)) {
+  else if ((strcmp(cartID, "2100") == 0) && (flashid == 0x227E)) {
     cartSize = 16;
     // Reset flashrom
     resetFlashrom_N64(romBase);
   }
 
   // Intel 512M29EW(64MB) with one flashrom chip
-  else if ((strcmp(cartID, "3901") == 0) && (strcmp(flashid, "227E") == 0)) {
+  else if ((strcmp(cartID, "3901") == 0) && (flashid == 0x227E)) {
     cartSize = 64;
     // Reset flashrom
     resetFlashrom_N64(romBase);
   }
 
   // Unknown 227E type
-  else if (strcmp(flashid, "227E") == 0) {
+  else if (flashid == 0x227E) {
     cartSize = 0;
     // Reset flashrom
     resetFlashrom_N64(romBase);
@@ -4100,10 +4103,11 @@ void idFlashrom_N64() {
     if (strcmp(cartID, "7E7E") == 0) {
       resetMSP55LV100_N64(romBase);
       cartSize = 64;
-      strncpy(flashid, cartID, 5);
+      flashid = 0x7E7E;
+      strncpy(flashid_str, cartID, 5);
     }
   }
-  if ((strcmp(flashid, "1240") == 0) && (strcmp(cartID, "1240") == 0)) {
+  if ((flashid == 0x1240) && (strcmp(cartID, "1240") == 0)) {
     print_Error(F("Please reseat cartridge"), true);
   }
 }
@@ -4308,12 +4312,12 @@ void eraseSector_N64(unsigned long sectorSize) {
     blinkLED();
 
     // Spansion S29GL256N(32MB/64MB) with two flashrom chips
-    if ((currSector == 0x2000000) && (strcmp(cartID, "2201") == 0) && (strcmp(flashid, "227E") == 0)) {
+    if ((currSector == 0x2000000) && (strcmp(cartID, "2201") == 0) && (flashid == 0x227E)) {
       // Change to second chip
       flashBase = romBase + 0x2000000;
     }
     // Macronix MX29LV640(8MB/16MB) with two flashrom chips
-    else if ((currSector == 0x800000) && ((strcmp(flashid, "22C9") == 0) || (strcmp(flashid, "22CB") == 0))) {
+    else if ((currSector == 0x800000) && ((flashid == 0x22C9) || (flashid == 0x22CB))) {
       flashBase = romBase + 0x800000;
     }
 
@@ -4630,7 +4634,7 @@ void flashGameshark_N64() {
   // !!!! SST 29EE010 may have a 5V requirement for writing however dumping works at 3V. As such it is not !!!!
   // !!!!        advised to write to a cart with this chip until further testing can be completed.         !!!!
 
-  if (strcmp(flashid, "0808") == 0 || strcmp(flashid, "0404") == 0 || strcmp(flashid, "3535") == 0 || strcmp(flashid, "0707") == 0) {
+  if (flashid == 0x0808 || flashid == 0x0404 || flashid == 0x3535 || flashid == 0x0707) {
     backupGameshark_N64();
     println_Msg("");
     println_Msg(F("This will erase your"));
@@ -4702,7 +4706,7 @@ void flashGameshark_N64() {
   // If the ID is unknown show error message
   else {
     print_Msg(F("ID: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     print_Error(F("Unknown flashrom"), false);
   }
 
@@ -4729,7 +4733,8 @@ void idGameshark_N64() {
   // Read 1 byte vendor ID
   readWord_N64();
   // Read 2 bytes flashrom ID
-  sprintf(flashid, "%04X", readWord_N64());
+  flashid = readWord_N64();
+  sprintf(flashid_str, "%04X", flashid);
   // Reset flashrom
   resetGameshark_N64();
 }
@@ -4864,7 +4869,7 @@ unsigned long verifyGameshark_N64() {
           setAddress_N64(romBase + 0xC00000 + currSector + currSdBuffer + currByte);
           // Compare both
           if (readWord_N64() != currWord) {
-            if ((strcmp(flashid, "0808") == 0) && (currSector + currSdBuffer + currByte > 0x3F) && (currSector + currSdBuffer + currByte < 0x1080)) {
+            if ((flashid == 0x0808) && (currSector + currSdBuffer + currByte > 0x3F) && (currSector + currSdBuffer + currByte < 0x1080)) {
               // Gameshark maps this area to the bootcode of the plugged in cartridge
             } else {
               writeErrors++;
diff --git a/Cart_Reader/NES.ino b/Cart_Reader/NES.ino
index d559ce6..de72358 100644
--- a/Cart_Reader/NES.ino
+++ b/Cart_Reader/NES.ino
@@ -5035,16 +5035,16 @@ void NESmaker_ID() {  // Read Flash ID
   write_prg_byte(0xAAAA, 0x55);
   write_prg_byte(0xC000, 0x01);
   write_prg_byte(0x9555, 0x90);  // Software ID Entry
-  unsigned char ID1 = read_prg_byte(0x8000);
-  unsigned char ID2 = read_prg_byte(0x8001);
-  sprintf(flashid, "%02X%02X", ID1, ID2);
+  flashid = read_prg_byte(0x8000) << 8;
+  flashid |= read_prg_byte(0x8001);
+  sprintf(flashid_str, "%04X", flashid);
   write_prg_byte(0xC000, 0x01);
   write_prg_byte(0x9555, 0xAA);
   write_prg_byte(0xC000, 0x00);
   write_prg_byte(0xAAAA, 0x55);
   write_prg_byte(0xC000, 0x01);
   write_prg_byte(0x9555, 0xF0);      // Software ID Exit
-  if (strcmp(flashid, "BFB7") == 0)  // SST 39SF040
+  if (flashid == 0xBFB7)  // SST 39SF040
     flashfound = 1;
 }
 
@@ -5098,7 +5098,7 @@ void writeFLASH() {
     display_Update();
   } else {
     print_Msg(F("Flash ID: "));
-    println_Msg(flashid);
+    println_Msg(flashid_str);
     println_Msg(F(""));
     println_Msg(F("NESmaker Flash Found"));
     println_Msg(F(""));
diff --git a/Cart_Reader/SFM.ino b/Cart_Reader/SFM.ino
index dcca1d7..7a7095b 100644
--- a/Cart_Reader/SFM.ino
+++ b/Cart_Reader/SFM.ino
@@ -311,9 +311,9 @@ void sfmFlashMenu() {
         println_Msg(F("OK"));
         display_Update();
         idFlash_SFM(0xC0);
-        if (strcmp(flashid, "c2f3") == 0) {
+        if (flashid == 0xc2f3) {
           idFlash_SFM(0xE0);
-          if (strcmp(flashid, "c2f3") == 0) {
+          if (flashid == 0xc2f3) {
             // Reset flash
             resetFlash_SFM(0xC0);
             resetFlash_SFM(0xE0);
@@ -350,9 +350,9 @@ void sfmFlashMenu() {
         println_Msg(F("OK"));
         display_Update();
         idFlash_SFM(0xC0);
-        if (strcmp(flashid, "c2f3") == 0) {
+        if (flashid == 0xc2f3) {
           idFlash_SFM(0xE0);
-          if (strcmp(flashid, "c2f3") == 0) {
+          if (flashid == 0xc2f3) {
             // Reset flash
             resetFlash_SFM(0xC0);
             resetFlash_SFM(0xE0);
@@ -1014,7 +1014,9 @@ void idFlash_SFM(int startBank) {
     controlIn_SFM();
 
     // Read the two id bytes into a string
-    sprintf(flashid, "%x%x", readBank_SFM(startBank, 0x00), readBank_SFM(startBank, 0x02));
+    flashid = readBank_SFM(startBank, 0x00) << 8;
+    flashid |= readBank_SFM(startBank, 0x02);
+    sprintf(flashid_str, "%04x", flashid);
   } else {
     writeBank_SFM(1, 0x8000 + 0x1555L * 2, 0xaa);
     writeBank_SFM(0, 0x8000 + 0x2AAAL * 2, 0x55);
@@ -1026,7 +1028,9 @@ void idFlash_SFM(int startBank) {
     controlIn_SFM();
 
     // Read the two id bytes into a string
-    sprintf(flashid, "%x%x", readBank_SFM(0, 0x8000), readBank_SFM(0, 0x8000 + 0x02));
+    flashid = readBank_SFM(0, 0x8000) << 8;
+    flashid |= readBank_SFM(0, 0x8000 + 0x02);
+    sprintf(flashid_str, "%04x", flashid);
   }
 }
 
@@ -1473,7 +1477,7 @@ void eraseMapping(byte startBank) {
   if (unlockHirom()) {
     // Get ID
     idFlash_SFM(startBank);
-    if (strcmp(flashid, "c2f3") == 0) {
+    if (flashid == 0xc2f3) {
       resetFlash_SFM(startBank);
 
       // Switch to write
@@ -1583,7 +1587,7 @@ void writeMapping_SFM(byte startBank, uint32_t pos) {
   if (unlockHirom()) {
     // Get ID
     idFlash_SFM(startBank);
-    if (strcmp(flashid, "c2f3") == 0) {
+    if (flashid == 0xc2f3) {
       resetFlash_SFM(startBank);
 
       // Switch to write
@@ -1716,9 +1720,9 @@ void write_SFM(int startBank, uint32_t pos) {
   if (unlockHirom()) {
     // Get ID
     idFlash_SFM(startBank);
-    if (strcmp(flashid, "c2f3") == 0) {
+    if (flashid == 0xc2f3) {
       print_Msg(F("Flash ID: "));
-      println_Msg(flashid);
+      println_Msg(flashid_str);
       display_Update();
       resetFlash_SFM(startBank);
       delay(1000);