again looks dark yellow instead of brown.

The relative luminances of the colors produced by the composite color-generating circuit differ between CGA revisions: they are identical for colors 1-6 and 9-14 with early CGAs produced until 1983, and are different for later CGAs due to the addition of additional resistors.

Standard text modes

CGA offers four BIOS text modes (Modes 0 to 3, called alphanumeric or A/N modes in IBM's documentation). In these modes, individual pixels

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