COLOR
REGISTERS
IN
DUAL-PLAYFIELD
MODE
When you are using dual playfields, the hardware interprets color numbers for playfield
1 from
the
bit combinations of bit-planes
I,
3, and
S.
Bits from PLANE S have the
highest significance and form the most significant digit of the color register number.
Bits from PLANE 0 have the lowest significance. These bit combinations select the first
eight color registers from the color palette as shown in table 3-7.
Table
3-7:
Playfield 1 Color Registers - Low-resolution Mode
PLAYFIELD 1
Bit
Color
Combination
Selected
000 Transparent mode
001
COLOR1
010
COLOR2
011
COLOR3
100 COLOR4
101
COLORS
110 COLOR6
111
COLOR7
The
hardware interprets color numbers for playfield 2 from the
bit
combinations of bit-
planes
2,
4,
and
6.
Bits from PLANE 6 have the highest significance. Bits from PLANE
2 have the lowest significance. These bit combinations select the color registers from the
second eight colors in the color table as shown
in
table 3-8.
62
Playfield Hardware