Add some flashcarts dumping support

Add support for :
- "16M / 32M Pocket Flash Card" : old flashcarts, respectively in black, and transparent purple cases. Since their flash chips are returning 0x204C value (4Mbits), you will need to manually select the wanted ROM size before dumping them.
- "NeoGeo USB Flash Masta 2 in 1" : contains 2x 16Mbits Fujitsu chips, now detected fine.

Cart_Reader/NGP.ino

@@ -3,10 +3,11 @@
 //******************************************
 #ifdef enable_NGP
 
-static const char ngpMenuItem1[] PROGMEM = "Read Rom";
+static const char ngpMenuItem1[] PROGMEM = "Read ROM";
 static const char ngpMenuItem2[] PROGMEM = "Read chip info";
+static const char ngpMenuItem3[] PROGMEM = "Change ROM size";
 //static const char ngpMenuItemReset[] PROGMEM = "Reset"; (stored in common strings array)
-static const char* const menuOptionsNGP[] PROGMEM = { ngpMenuItem1, ngpMenuItem2, string_reset2 };
+static const char* const menuOptionsNGP[] PROGMEM = { ngpMenuItem1, ngpMenuItem2, ngpMenuItem3, string_reset2 };
 
 static const char ngpRomItem1[] PROGMEM = "4 Mbits / 512 KB";
 static const char ngpRomItem2[] PROGMEM = "8 Mbits / 1 MB";
@@ -54,8 +55,8 @@ void ngpMenu() {
   vselect(false);
   uint8_t mainMenu;
 
-  convertPgm(menuOptionsNGP, 3);
+  convertPgm(menuOptionsNGP, 4);
-  mainMenu = question_box(F("NGP Menu"), menuOptions, 3, 0);
+  mainMenu = question_box(F("NGP Menu"), menuOptions, 4, 0);
 
   switch (mainMenu) {
     case 0:
@@ -69,6 +70,10 @@ void ngpMenu() {
       break;
 
     case 2:
+      changeSize_NGP();
+      break;
+
+    case 3:
       resetArduino();
       break;
   }
@@ -101,13 +106,29 @@ bool getCartInfo_NGP() {
 
 
   switch (romSize) {
-    case 0xffff: return false; break;        // detection error (no cart inserted or hw problem)
+    // 4 Mbits
-    case 0x98ab: cartSize = 524288; break;   // 4 Mbits - Toshiba
+    case 0x98ab:  // Toshiba
-    case 0x204c: cartSize = 524288; break;   // 4 Mbits - STMicroelectronics ?
+    case 0x204c:  // STMicroelectronics ?
-    case 0x982c: cartSize = 1048576; break;  // 8 Mbits - Toshiba
+        cartSize = 524288;
-    case 0xec2c: cartSize = 1048576; break;  // 8 Mbits - Samsung
+        break;
-    case 0x982f: cartSize = 2097152; break;  // 16 Mbits - Toshiba
+
-    case 0xec2f: cartSize = 2097152; break;  // 16 Mbits - Samsung
+    // 8 Mbits
+    case 0x982c:  // Toshiba
+    case 0xec2c:  // Samsung
+        cartSize = 1048576;
+        break;
+
+    // 16 Mbits
+    case 0x982f:  // Toshiba
+    case 0xec2f:  // Samsung
+    case 0x4c7:   // Fujitsu (FlashMasta USB)
+        cartSize = 2097152;
+        break;
+
+    // detection error (no cart inserted or hw problem)
+    case 0xffff:
+        return false;
+        break;
   }
 
   // reset to read mode
@@ -178,22 +199,9 @@ void printCartInfo_NGP() {
 }
 
 void readROM_NGP(char* outPathBuf, size_t bufferSize) {
-  // Set cartsize manually if chip ID is unknown
+  // Set rom size manually if chip ID is unknown
-  if (cartSize == 0) {
+  if (cartSize == 0)
-    unsigned char ngpRomMenu;
+    changeSize_NGP();
-
-    // Copy menuOptions out of progmem
-    convertPgm(ngpRomOptions, 4);
-    ngpRomMenu = question_box(F("Select ROM size"), menuOptions, 4, 0);
-
-    // wait for user choice to come back from the question box menu
-    switch (ngpRomMenu) {
-      case 0: cartSize = 524288; break;
-      case 1: cartSize = 1048576; break;
-      case 2: cartSize = 2097152; break;
-      case 3: cartSize = 4194304; break;
-    }
-  }
 
   // generate fullname of rom file
   snprintf(fileName, FILENAME_LENGTH, "%s.ngp", romName);
@@ -327,6 +335,22 @@ void scanChip_NGP() {
   }
 }
 
+void changeSize_NGP() {
+  unsigned char ngpRomMenu;
+
+  // Copy menuOptions out of progmem
+  convertPgm(ngpRomOptions, 4);
+  ngpRomMenu = question_box(F("Select ROM size"), menuOptions, 4, 0);
+
+  // wait for user choice to come back from the question box menu
+  switch (ngpRomMenu) {
+    case 0: cartSize = 524288; break;
+    case 1: cartSize = 1048576; break;
+    case 2: cartSize = 2097152; break;
+    case 3: cartSize = 4194304; break;
+  }
+}
+
 void writeByte_NGP(uint32_t addr, uint8_t data) {
   PORTF = addr & 0xff;
   PORTK = (addr >> 8) & 0xff;
@@ -377,4 +401,4 @@ uint8_t readByte_NGP(uint32_t addr) {
 #endif
 //******************************************
 // End of File
-//******************************************
+//******************************************