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The Xterm terminal emulator. In the early 1980s, large amounts of software directly used these sequences to update screen displays. This included everything on VMS (which assumed DEC terminals), most software designed to be portable on CP/M home computers, and even lots of Unix software as it was easier to use than the termcap libraries, such as the shell script examples below in this article.
This lets the programmer save the additional bytes, 256 (colors) × 3 (color channels) = 768 bytes, at the end of the screen capture file. These have to be read back out again and written to the color port for them to change, when an image containing a footer of color info gets loaded.
A major update of the standard, it provided support for flat panel displays, VESA DPVL (Digital Packet Video Link) standard; it added a range of television controls and introduced individual control of multiple windows on a display. New classes of VCP codes associated with asset management, secondary displays (for information, status, etc.) and ...
Each screen character is represented by two bytes aligned as a 16-bit word accessible by the CPU in a single operation. The lower (or character) byte is the actual code point for the current character set, and the higher (or attribute) byte is a bit field used to select various video attributes such as color, blinking, character set, and so forth. [6]
Color 6 is treated specially; normally, color 6 would become dark yellow, as seen to the left, but in order to achieve a more pleasing brown tone, special circuitry in most RGBI monitors, starting with the IBM 5153 color display, [11] makes an exception for color 6 and changes its hue from dark yellow to brown by reducing the analogue green ...
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The Apple II video output is really a monochrome display based upon the bit patterns in the video memory (or pixels). These pixels are combined in quadrature with the colorburst signal to be interpreted as color by a composite video display. This results in a 16-color composite video palette, based on the YIQ color space used by the NTSC color ...
Full color image along with its R, G, and B components Additive color mixing demonstrated with CD covers used as beam splitters A diagram demonstrating additive color with RGB. The RGB color model is an additive color model [1] in which the red, green, and blue primary colors of light are added together in various ways to reproduce a broad ...