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A VGA extender is an electronic device that increases the signal strength from a VGA port, most often from a computer. They are often used in schools, businesses, and homes when multiple monitors are being run off one VGA port, or if the cable between the monitor and the computer will be excessively long (often pictures appear blurry or have ...
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]
1: 32-bit is really (8:8:8:8), but the final 8-bit number is an "empty" alpha channel. It is otherwise equal to 24-bit colour. Many GPUs use 32-bit colour mode instead of 24-bit mode merely for faster video memory access through 32-bit memory alignment. VGA= 864 [ 352 (0160h)] also appears to select 1280 ×800 (8-bit) for various laptops' displays.
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 ...
The original IBM EGA was an 8-bit PC ISA card with 64 KB of onboard RAM. An optional daughter-board (the Graphics Memory Expansion Card) provided a minimum of 64 KB additional RAM, and up to 192 KB if fully populated with the Graphics Memory Module Kit. [22] Without these upgrades, the card would be limited to four colors in 640 × 350 mode. [23]
Mini-VGA connectors are proprietary and non-standard alternative video connectors that were used on some laptops and other computer systems in place of a standard VGA connector. Apple , [ 1 ] HP , [ 2 ] and Asus [ 3 ] each introduced separate connectors using the same moniker of "mini-VGA", but which are otherwise physically incompatible with ...
The first public version of VGA-Copy was 2.0. [2] Some earlier full versions were published by cdv Software Entertainment. Later versions were published under the names VGA-Copy Pro and VGA-Copy/386. VGA-Copy Pro 5.3 was the last version to work on an Intel 286 (AT class) computer with 1MB of RAM, as well as on Micro Channel architecture systems.
The highest display resolution of any mode was 640 × 200, and the highest color depth supported was 4-bit (16 colors). The CGA card could be connected either to a direct-drive CRT monitor using a 4-bit digital ( TTL ) RGBI interface, such as the IBM 5153 color display, or to an NTSC -compatible television or composite video monitor via an RCA ...