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The Monochrome Display Adapter (MDA, also MDA card, Monochrome Display and Printer Adapter, MDPA) is IBM's standard video display card and computer display standard for the IBM PC introduced in 1981. The MDA does not have any pixel-addressable graphics modes, only a single monochrome text mode which can display 80 columns by 25 lines of high ...
The difference between these two modes can only be seen on a composite monitor, where mode 0 disables the color burst, making all text appear in grayscale. Mode 1 enables the color burst, allowing for color. Mode 0 and Mode 1 are functionally identical on RGB monitors and on later adapters that emulate CGA without supporting composite color output.
These connectors had the same number of pins as the above DE-15 connectors, but used the more traditional pin size, pin spacing, and size shell of the DA-15 standard connector. "VGA adapters" (i.e. DA-15 to DE-15 dongles) were available but sometimes monitor-specific, or they needed DIP switch configuration, as the Macintosh's monitor sense ...
Male connector seen from the front [1] Pin 1: XCLK External Clock: Pin 2: XCLKEN External Clock Enable: Pin 3: RED Analog Red: Pin 4: GREEN Analog Green: Pin 5: BLUE Analog Blue: Pin 6: DI Digital Intensity (47 Ohm) Pin 7: DB Digital Blue (47 Ohm) Pin 8: DG Digital Green (47 Ohm) Pin 9: DR Digital Red (47 Ohm) Pin 10: CSYNC Composite Sync (used ...
Motorola 6845 CRT controller. The Motorola 6845, or MC6845, is a display controller that was widely used in 8-bit computers during the 1980s. [1] [2] Originally intended for designs based on the Motorola 6800 CPU and given a related part number, it was more widely used alongside various other processors, and was most commonly found in machines based on the Zilog Z80 and MOS 6502.
Bits 3–2: White point x value least-significant 2 bits Bits 1–0: White point y value least-significant 2 bits 7: White point x value most significant 8 bits (like EDID byte 27) 8: White point y value most significant 8 bits (like EDID byte 28) 9: datavalue = (gamma − 1)×100 (1.0–3.54, like EDID byte 23) 10–14: Second descriptor.
On a typical standard 2.2-gamma CRT display, an input intensity RGB value of (0.5, 0.5, 0.5) only outputs about 22% of full brightness (1.0, 1.0, 1.0), instead of 50%. [19] To obtain the correct response, a gamma correction is used in encoding the image data, and possibly further corrections as part of the color calibration process of the device.
Since the point may not be on a lattice point, the lattice values must be interpolated; most products use trilinear interpolation. [1] 3D LUTs are used extensively in the movie production chain, as part of the digital intermediate process. [2] [3] [4] Cubes may be of various sizes and bit depths. Often [when?] 33×33×33 cubes are used as 3D LUTs.
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