0x6B ( 107 )  Tilemap Control
  
BitsDescription
71 Enable the tilemap (soft reset = 0)
60 for 40x32, 1 for 80x32 (soft reset = 0)
5Eliminate the attribute entry in the tilemap (soft reset = 0)
4Palette select (soft reset = 0)
3Select textmode (soft reset = 0)
2Reserved, must be 0
1Activate 512 tile mode (soft reset = 0)
0Force tilemap on top of ULA (soft reset = 0)