Chapter 10 Dot Color Data

If the dot color data of the sprite and each scroll screen is in pallet format, the color RAM address is obtained by adding the color RAM address offset register value to the dot color data composed of the palette number and dot color code. The color data at that address is output as dot color data. In the case of RGB format, the dot color data composed of each RGB data is output as it is as the color data of that dot.
If the dot color data on the scroll screen is in pallet format, you can specify whether to use the special priority function or special color calculation function according to the lower 4 bits of the dot color data.

10.1 Palette format dot color data

The dot color data in the palette format is 11-bit data, and the color RAM address offset register value of the corresponding screen is added to the upper 3 bits to obtain the color RAM address that stores the color data for that dot. The

■ Sprite dot color data

Palette format sprite dot color data varies depending on the specified sprite type. When a sprite type with dot color data of 10 bits or less is specified, the missing upper bits are fixed to 0, the color RAM address offset value for the sprite is added to the upper 3 bits, and the color RAM address of the dot will do. When the color RAM mode is set to mode 0 or mode 2, the most significant bit of the color RAM address is ignored.