     $DC0E/56334/CIA1+14:  CIA Control Register A

       +-------+--------------------------------------------------------+
       | Bit 7 |   Time-of-Day Clock Frequency: 1 = 50 Hz, 0 = 60 Hz    |
       | Bit 6 |   Serial Port ($DC0C) I/O Mode: 1 = Output, 0 = Input  |
       | Bit 5 |   Timer A Counts: 1 = CNT Signals, 0 = System 02 Clock |
       | Bit 4 |   Force Load Timer A: 1 = Yes                          |
       | Bit 3 |   Timer A Run Mode: 1 = One-Shot, 0 = Continuous       |
       | Bit 2 |   Timer A Output Mode to PB6: 1 = Toggle, 0 = Pulse    |
       | Bit 1 |   Timer A Output on PB6: 1 = Yes, 0 = No               |
       | Bit 0 |   Start/Stop Timer A: 1 = Start, 0 = Stop              |
       +-------+--------------------------------------------------------+

       Default Value: $11/17 (%00001001)

    Kernal-Reference:

     LDA $DC0E   : $F87D $FF73
     STA $DC0E   : $F914 $FDB0 $FF7A