+------------------------------------------------------------------------
  |
  |      RETRO-REPLAY-Cartridge [http://rr.c64.org]:
  |
  +------------------------------------------------------------------------
  |
  | Used I/O-Area:
  |
  |   $DE00/56832/RR+0       Control-Register
  |   $DE01/56833/RR+1       Extended Control-Register
  |
  |  If SilverSurfer(RS232) present:
  |
  |   $DE08/56840/RR+8       Receive/Transmit Buffer
  |                          Baud Rate Divisor LSB
  |   $DE09/56841/RR+9       Interrupt Enable Register
  |                          Baud Rate Divisor MSB
  |   $DE0A/56842/RR+10      Interrupt Identification Register (read)
  |                          FIFO Control Register (write)
  |   $DE0B/56843/RR+11      Line Control Register
  |   $DE0C/56844/RR+12      Modem Control Register
  |   $DE0D/56845/RR+13      Line Status Register (read only)
  |   $DE0E/56846/RR+14      Modem Status Register (read only)
  |   $DE0F/56847/RR+15      Scratch Pad Register
  |
  | Used KERNAL-vectors:
  |
  |   (Software is still under development, so vectors will change
  |    between releases.)
  |
  | Memory Maps
  |
  +------------------------------------------------------------------------