      +------------------------------------------------------------------------
      |
      |      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
      |
      +------------------------------------------------------------------------