711



        E 710,0: POKE 709,15: COLOR 1
     30   PLOT A,D: DRAWTO A,C: COLOR 2: P
        LOT F,D: DRAWTO F,C:
     40   PLOT A + 1,D: DRAWTO A + 1,C
     50   COLOR 3: PLOT B,D: DRAWTO B,C
     60   GOTO 60

     A little experimentation with this will show you that the colors
     obtained depend on which pixels are turned on and how close
     together the pixel columns are. There are four "colors" you can
     obtain, as shown before. Pixels marked one are on; marked zero
     means they are off. Each pair of pixels is one color clock. Three
     color clocks are shown together for clarity:

     00:01:00 = color A     00:11:00 = color B
     00:10:00 = color C     00:01:10 = color D

     See BYTE, May 1982, De Re Atari, and Your Atari 400/800.

711            2C7            COLOR3
     The same as the above but for playfield three. Also, the color for
     GR.1 and GR.2 inverse lowercase letters. Shadow for 53273
     ($D019).

712            2C8            COLOR4
     The same as the above but for the background (BAK) and border
     color. Shadow for 53274 ($D01A). In GTIA mode ten, 704 stores
     the background color (BAK), while 712 becomes a normal color
     register.

     Here are the default (powerup) values for the COLOR registers
     (PCOL registers are all set to zero on powerup):

     Register      Color  =  Hue  Luminance
     708  (CO.0)     40       2       8
     709  (CO.1)    202      12      10
     710  (CO.2)    148       9       4
     711  (CO.3)     70       4       6
     712  (CO.4)      0       0       0

----------------------------------------------------------------------------
Locations 713 to 735 ($2C9 to $2DF) are spare bytes. Locations 736 to
767 ($2E0 to $2FF) are for miscellaneous use.

736-739        2E0-2E3        GLBABS
     Global variables, or, four spare bytes for non DOS users. For
     DOS users they are used as below:

736-737        2E0-2E1        RUNAD
     Used by DOS for the run address read from the disk sector one or
     from a binary file. Upon completion of any binary load, control