 #define SELECTKEY       3
 #define MAX_ROMS       99
 #define MAX_ROM_SIZE 6144
+#define GO_MSG          9  // 7-segment Message offset
+#define ER_MSG         11  // 7-segment Message offset
 
 // Global variables
 byte lastkey = NOKEY;
+byte message = GO_MSG;
 byte romNumber = 1;
 char romName[] = { 0, 0, 0, 0, 0, 0, 0 };
 File romFile;
-unsigned blinkTimeHigh = 500;
-unsigned blinkTimeLow  = 500;
 
-byte digitOne[10]= {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
+byte SevenSegChar[]= {
+  0x3f,  // 0
+  0x06,  // 1
+  0x5b,  // 2
+  0x4f,  // 3
+  0x66,  // 4
+  0x6d,  // 5
+  0x7d,  // 6
+  0x07,  // 7
+  0x7f,  // 8
+  0x6f,  // 9
+  0x63,  // o
+  0x79,  // E
+  0x50   // r
+};
 
 void setup() {
   pinMode(SD_CS, OUTPUT);

void dispShowNumber(byte num) {
  byte i = num % 10;
  byte j = (num - i) / 10;
      digitalWrite(DISP_LATCH, LOW);
      shiftOut(DISP_DATA, DISP_CLK, MSBFIRST, digitOne[i]); // digitTwo
      shiftOut(DISP_DATA, DISP_CLK, MSBFIRST, digitOne[j]); // digitOne
      digitalWrite(DISP_LATCH, HIGH);
  
}

#define SD_CS          4  // Chip Select for SD card
#define LED           13

#define DISP_OE       A2  // 7-segment display
#define DISP_LATCH    A3  // 7-segment display
#define DISP_CLK      A4  // 7-segment display
#define DISP_DATA     A5  // 7-segment display

// Miscellaneous other defines
#define NOKEY           0
