This section contains summaries of the playfield color selection registers
including color register contents, example colors, and the differences in
color selection in high resolution and low resolution modes. The Amiga has
32 color registers and each one has 4 bits of red, 4 bits of green, and 4
bits of blue information.  Table 3-15 shows the bit assignments of each
color register.  All color registers are write-only.


              Color Register Bits           Contents
              -------------------           --------
                   15 - 12           Unused (set these to 0)
                   11 -  8                  Red data
                    7 -  4                 Green data
                    3 -  0                  Blue data

                 Table 3-15: Color Register Contents


 some sample color register contents 
 color selection in low resolution mode 
 color selection in high resolution mode 
 color selection in hold-and-modify mode 
 color selection in extra half brite (ehb) mode