$DD09/56585/CIA2+9:   Time-of-Day Clock: Seconds

   +----------+---------------------------------------------------+
   | Bit  7   |   Always 0                                        |
   | Bits 6-4 |   10 Seconds in BCD-Format                        |
   | Bits 3-0 |    1 Seconds in BCD-Format                        |
   +----------+---------------------------------------------------+