![]() The lower three bits represent red, green, and blue color components.When four bits are used (for low-resolution mode, or for programming color registers) they are arranged according to the RGBI color model: TEXT COLOR CONVERTER FULLIn the medium- and high-resolution modes, colors are stored at a lower bit depth and selected by fixed palette indexes, not direct selection from the full 16-color palette. Note the use of dithering to simulate gray tones and non-square pixel ratio that deforms the fonts.ĬGA uses a 16-color gamut, but not all colors are available at all times, depending on which graphics mode is being used. The 40×25 text and 320×200 graphics modes are usable with a television, and the 80×25 text and 640×200 graphics modes are intended for a monitor. IBM intended that CGA be compatible with a home television set. 80×25 with 8×8 pixel font (effective resolution of 640×200).40×25 with 8×8 pixel font (effective resolution of 320×200). TEXT COLOR CONVERTER SOFTWARESome software achieved greater color depth by utilizing artifact color when connected to a composite monitor.
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