+// Topaz command set:
+#define        TOPAZ_REQA                                              0x26    // Request
+#define        TOPAZ_WUPA                                              0x52    // WakeUp
+#define        TOPAZ_RID                                               0x78    // Read ID
+#define        TOPAZ_RALL                                              0x00    // Read All (all bytes)
+#define        TOPAZ_READ                                              0x01    // Read (a single byte)
+#define        TOPAZ_WRITE_E                                   0x53    // Write-with-erase (a single byte)
+#define        TOPAZ_WRITE_NE                                  0x1a    // Write-no-erase (a single byte)
+// additional commands for Dynamic Memory Model
+#define TOPAZ_RSEG                                             0x10    // Read segment
+#define TOPAZ_READ8                                            0x02    // Read (eight bytes)
+#define TOPAZ_WRITE_E8                                 0x54    // Write-with-erase (eight bytes)
+#define TOPAZ_WRITE_NE8                                        0x1B    // Write-no-erase (eight bytes)
+
+
+#define ISO_14443A     0
+#define ICLASS         1
+#define ISO_14443B     2
+#define TOPAZ          3