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This waiting period could be several milliseconds during which neither buffer can be touched. In triple buffering, the program has two back buffers and can immediately start drawing in the one that is not involved in such copying. The third buffer, the front buffer, is read by the graphics card to display the image on the monitor.
Ways to prevent video tearing depend on the display device and video card technology, the software in use, and the nature of the video material. The most common solution is to use multiple buffering. Most systems use multiple buffering and some means of synchronization of display and video memory refresh cycles. [3]
The latter method is considerably faster, and allows quick reading of the text buffer, for which reason it is preferred for advanced TUI programs. The VGA text buffer is located at physical memory address 0xB8000. [14] Since this address is usually used by 16-bit x86 processes operating in real-mode, it is also the first half of memory segment ...
1 = with serrations (H-sync during V-sync). Bit 1: Sync on red and blue lines additionally to green 0 = sync on green signal only; 1 = sync on all three (RGB) video signals. Bits 4–3 = 10 Digital sync., composite (on HSync). If set, the following bit definitions apply: Bit 2: Serration. 0 = without serration; 1 = with serration (H-sync during ...
Vertical synchronization or Vsync can refer to: Analog television#Vertical synchronization, a process in which a pulse signal separates analog video fields; Screen tearing#Vertical synchronization, a process in which digital graphics rendering syncs to match up with a display's refresh rate; Vsync (library), a software library written in C# for ...
In modern operating systems, a triple fault is typically caused by a buffer overflow or underflow in a device driver which writes over the interrupt descriptor table (IDT). If the IDT is corrupted, when the next interrupt happens, the processor will be unable to call either the needed interrupt handler or the double fault handler because the ...
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More elaborate schemes also existed that used all of the 4 ID pins while manipulating the HSync and VSync signals in order to extract 16 bits (4 ID pin values for each of the 4 combinations of HSync and VSync states) of monitor identification. [4] DDC changed the purpose of the ID pins to incorporate a serial link interface. However, during the ...