CLXDAT

         This address reads (and clears) the collision detection reg. The bit
         assignments are below


   Note: Playfield 1 is all odd numbered enabled bit planes.
         Playfield 2 is all even numbred enabled bit planes.


         +------+----------------------------------------+
         | BIT# | COLLISIONS REGISTERED                  |
         +------+----------------------------------------+
         | 15   | not used                               |
         | 14   | Sprite 4 (or 5) to Sprite 6 (or 7)     |
         | 13   | Sprite 2 (or 3) to Sprite 6 (or 7)     |
         | 12   | Sprite 2 (or 3) to Sprite 4 (or 5)     |
         | 11   | Sprite 0 (or 1) to Sprite 6 (or 7)     |
         | 10   | Sprite 0 (or 1) to Sprite 4 (or 5)     |
         | 09   | Sprite 0 (or 1) to Sprite 2 (or 3)     |
         | 08   | Playfield 2 to Sprite 6 (or 7)         |
         | 07   | Playfield 2 to Sprite 4 (or 5)         |
         | 06   | Playfield 2 to Sprite 2 (or 3)         |
         | 05   | Playfield 2 to Sprite 0 (or 1)         |
         | 04   | Playfield 1 to Sprite 6 (or 7)         |
         | 03   | Playfield 1 to Sprite 4 (or 5)         |
         | 02   | Playfield 1 to Sprite 2 (or 3)         |
         | 01   | Playfield 1 to Sprite 0 (or 1)         |
         | 00   | Playfield 1 to Playfield 2             |
         +------+----------------------------------------+