DEFINES ***********************************.

Defines each text symbol's segment in terms of COM and BIT numbers, in a way that we can enumerate each bit for each text segment in the following bit pattern:

*  -------0------
*
* |   \7  |8  /9 |
* |5   \  |  /   |1
*
*  --6---  ---10--
*
* |    /  |  \11 |
* |4  /13 |12 \  |2
*
*  -------3------
* 

E.g.: First text character bit pattern #3 (above) is Segment 1D for Display Location COM 3, BIT 0