53276



     Priority order
      (Decimal values in brackets):

     Bit 0 = 1 (1):            Bit 1 = 1 (2):
     Player 0                  Player 0
     Player 1                  Player 1
     Player 2                  Playfield 0
     Player 3                  Playfield 1
     Playfield 0               Playfield 2
     Playfield 1               Playfield 3 and Player 5
     Playfield 2               Player 2
     Playfield 3 and Player 5  Player 3
     Background                Background

     Bit 2 = 1 (4):            Bit 3 = 1 (8):
     Playfield 0               Playfield 0
     Playfield 1               Playfield 1
     Playfield 2               Player 0
     Playfield 3 and Player 5  Player 1
     Player 0                  Player 2
     Player 1                  Player 3
     Player 2                  Playfield 2
     Player 3                  Playfield 3 and Player 5
     Background                Background

     Bit 4 = 1: Enable a fifth player out of the four missiles.

     Bit 5 = 1: Overlap of players 0 and 1, 2 and 3 is third color (else
     overlap is black). The resulting color is a logical OR of the two
     player colors.

     Bits 6 and 7 are used to select GTIA modes:
          0     0 = no GTIA modes
          0     1 = GTIA GR.9
          1     0 = GTIA GR.10
          1     1 = GTIA GR.11

53276          D01C           VDELAY
     (W) Vertical delay register. Used to give one-line resolution
     movement capability in the vertical positioning of an object when
     the two line resolution display is enabled. Setting a bit in
     VDELAY to one moves the corresponding object down by one TV
     line. If DMA is enabled, then moving an object by more than one
     line is accomplished by moving bits in the memory map instead.

     Bit   Decimal   Object
     7       128     Player 3
     6        64     Player 2
     5        32     Player 1
     4        16     Player 0