Tiles 0x00 and 0x20 along with palette bank switching are used to
generate the 4 color bars.
tile 0x00 is a solid color1
tile 0x20 is a solid color2
color1 and color2 are also used for text foreground and background,
so we need to leave palette0 untouched to allow for drawing text.
This leaves palettes 1 to 15 for the color bars.
red = tile 0x00, palette bank0
green = tile 0x20, palette bank0
blue = tile 0x00, palette bank1
white = tile 0x20, palette bank1
Mimics how they are done in unibios
Tiles 0x00 and 0x20 along with palette bank switching are used to generate the 4 color bars.
tile 0x00 is a solid color1 tile 0x20 is a solid color2
color1 and color2 are also used for text foreground and background, so we need to leave palette0 untouched to allow for drawing text. This leaves palettes 1 to 15 for the color bars.
red = tile 0x00, palette bank0 green = tile 0x20, palette bank0 blue = tile 0x00, palette bank1 white = tile 0x20, palette bank1
Confirmed they work on AES hardware