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Horizontal sync (or Composite sync) Pin 14: VSync: Vertical sync: Pin 15: ID3/SCL: I²C clock since DDC2, formerly monitor id. bit 3: The image and table detail the 15-pin VESA DDC2/E-DDC connector; the diagram's pin numbering is that of a female connector functioning as the graphics adapter output. In the male connector, this pin numbering ...
Vertical sync The original IBM EGA card includes a feature connector (blue connector J4, see first photo on this page), providing access to two RCA connectors at the back of card, in addition to several analog and digital signals that the EGA adaptor can be configured to use.
VGA section on the motherboard in IBM PS/55. The color palette random access memory (RAM) and its corresponding digital-to-analog converter (DAC) were integrated into one chip (the RAMDAC) and the cathode-ray tube controller was integrated into a main VGA chip, which eliminated several other chips in previous graphics adapters, so VGA only additionally required external video RAM and timing ...
Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source, such as a video display controller, to a display device, such as a computer monitor.
Initially intended for use by computer monitors and video cards, the standard made its way into consumer televisions. The parameters defined by standard include horizontal blanking and vertical blanking intervals, horizontal frequency and vertical frequency (collectively, pixel clock rate or video signal bandwidth), and horizontal/vertical sync ...
Consequently, it is impossible to double the vertical resolution to 400 scanlines using a standard 15 kHz monitor. The higher bandwidth used by 80-column text mode results in random short horizontal lines appearing onscreen (known as "snow") if a program writes directly to video memory during screen drawing.
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On the IBM PC, these were signaled from the graphics card to the monitor through the polarities of one or both H- and V-sync signals sent by the video adapter. [ 5 ] Later designs supported a continuous range of scan frequencies, such as the NEC Multisync which supported horizontal scan rates from 15 to 31 kHz [ 4 ] derived from the sync signal ...