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In contrast, a character entity reference refers to a character by the name of an entity which has the desired character as its replacement text. The entity must either be predefined (built into the markup language) or explicitly declared in a Document Type Definition (DTD). The format is the same as for any entity reference: &name;
A text mode signal may have the same timings as VESA standard modes. The same registers are used on adapter's side to set up these parameters in a text mode as in APA modes. The text mode output signal is essentially the same as in graphic modes, but its source is a text buffer and character generator, not a framebuffer as in APA.
Text mode is a computer display mode in which content is internally represented on a computer screen in terms of characters rather than individual pixels.Typically, the screen consists of a uniform rectangular grid of character cells, each of which contains one of the characters of a character set; at the same time, contrasted to graphics mode or other kinds of computer graphics modes.
ASCII (/ ˈ æ s k iː / ⓘ ASS-kee), [3]: 6 an acronym for American Standard Code for Information Interchange, is a character encoding standard for electronic communication. . ASCII codes represent text in computers, telecommunications equipment, and other devic
In alphanumeric mode, each character is a 5 dot wide by 7 dot high character in a box 8 dots wide and 12 lines high. This display mode occupies 512 bytes of memory from $400-$5FF and is a 32 character wide screen with 16 lines. The ROM character generator only holds 64 characters, so no lowercase characters are provided.
Other variants include the fourteen-segment display which does not split the top or bottom horizontal segments, and the twenty-two-segment display [1] that allows lower-case characters with descenders. Often a character generator is used to translate 7-bit ASCII character codes to the 16 bits that indicate which of the 16 segments to turn on or ...
512 bytes is a common disk sector size, [8] and exactly a half of kibibyte. Internet Relay Chat restricts the size of a message to 510 bytes, which fits to 512-bytes buffers when coupled with the message-separating CRLF sequence. [9] 512 = 2·256 is the highest number of glyphs that the VGA character generator can use simultaneously. [citation ...
It is a relatively simple display generator intended for NTSC television output: capable of displaying alphanumeric text, semigraphics, [12] and raster graphics contained within a roughly square display matrix 256 pixels wide by 192 lines high. The ROM includes a 5 x 7 pixel font, compatible with 6-bit ASCII.