   return c;
 }
 
+
 void sendToUSB(int c) {
+  // Print a character to the USB port
   if (c>0) {
     Serial.write(c);
   }
 }
 
 
+// ---- Misc
+
 bool parity(uint8_t v) {
+  // Compute the parity bit
   bool p = false;
   while (v) {
     p = !p;

}



int processTTYByte(int b) {
  int c = b;

  return p;
}


char *yesno(bool f) {
  if (f) return "yes";
  return "no";
}


// ----- Self-test routines ----------------------------------------------------
//
