Table 3-17 shows playfield color selection in low resolution mode. If the bit combinations from the playfields are as shown, the color is taken from the color register number indicated. Single Playfield DualPlayfields Color Normal Mode Hold-and-modify Mode Register (Bitplanes 5,4,3,2,1) (Bitplanes 4,3,2,1) Number ----------------------------------------------------------------------- Playfield 1 (Bitplanes 5,3,1) 00000 0000 000 0 * 00001 0001 001 1 00010 0010 010 2 00011 0011 011 3 00100 0100 100 4 00101 0101 101 5 00110 0100 110 6 00111 0111 111 7 Playfield 2 (Bitplanes 6,4,2) 01000 1000 000 ** 8 01001 1001 001 9 01010 1010 010 10 01011 1011 011 11 01100 1100 100 12 01101 1101 101 13 01110 1110 110 14 01111 1111 111 15 10000 - - 16 10001 - - 17 10010 - - 18 10011 - - 19 10100 NOT NOT 20 10101 USED USED 21 10110 IN IN 22 10111 THIS THIS 23 11000 MODE MODE 24 11001 - - 25 11010 - - 26 11011 - - 27 11100 - - 28 11101 - - 29 11110 - - 30 11111 - - 31 ________________ * Color register 0 always defines the background color. ** Selects ``transparent'' mode instead of selecting color register 8. Table 3-17: Low resolution Color Selection
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