Atari 800

COLBK (Background Color)(DOlA): This address writes data to the
Background Color-Lum Register.
Color
Luminance
I I I I I
Not I
D7
I
D6
I
D5
1
D4 D3
I
D2
I
Dl Used
X X X X 0 0 0 Zero Luminance (black)
0
0
1
ETC.
1 1 1 Max. Luminance(white)
0
0
0 0 Grey
0 0 0 1 Gold
0
0 1
0
Orange
0 0 1 1
Red-Orange
0
1
0 0 Pink
0 1
0
1
Purple
0 1
1 0
Purple-Blue
0
1
1 1 Blue
1
0 0 0
Blue
1
0 0 1
Light-Blue
1 0 1 0 Turquoise
1
0 1
1 Green-Blue
1 1
0 0
Green
1 1 0 1
Yellow-Green
1 1
1 0
Orange-Green
1
1 1 1
Light-Orange
OS SHADOW: COLOR4 (2C8)
E.
PLAYERS AND MISSILES
DMACTL, GRACTL, PMBASE and PRIOR also affect players and missiles.
COLPMO- COLPM3 (Player-Missile Color)(D012, D013, D014, D015): These
addresses write to the Player-Missile Color-Lum Registers. Missiles have
the same color-lum as their player unless missiles are used as a 5th player
(see bit 4 of PRIOR). A 5th player missile gets its color from COLPF3.
D7 D6 D5 D4 D3
D2
Dl
DO
(see COLBK for bit assignments)
OS SHADOWS: PCOLRO - 3 (2C0-2C3)
GRAFPO - GRAFP3 (Player Graphics Registers): (PO DOOD, Pl DOOE, P2 DOOF,
P3 DOlO): These addresses write data directly into the Player Graphics
Registers, independent of DMA. If DMA is enabled then the graphics registers
will be loaded automatically from the memory area specified by PMBASE(see
page II. 3).
I D7 : D6
D5 D4 D3 D2
Dl DO
Left
Right
Player on TV Screen
III.9