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Apple II text mode uses the 7-bit ASCII (us-ascii) character set. The high-bit is set to display in normal mode on the 40x24 text screen. ... 2513 character generator ...
On many Unix systems and early dial-up bulletin board systems the only common standard for box-drawing characters was the VT100 alternate character set (see also: DEC Special Graphics). The escape sequence Esc ( 0 switched the codes for lower-case ASCII letters to draw this set, and the sequence Esc ( B switched back:
ASCII art of a fish. ASCII art is a graphic design technique that uses computers for presentation and consists of pictures pieced together from the 95 printable (from a total of 128) characters defined by the ASCII Standard from 1963 and ASCII compliant character sets with proprietary extended characters (beyond the 128 characters of standard 7-bit ASCII).
The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a cursor, an instruction to start a new line, or a message that the text has been received.
Code page 437 (CCSID 437) is the character set of the original IBM PC (personal computer). [2] It is also known as CP437, OEM-US, OEM 437, [3] PC-8, [4] or DOS Latin US. [5] The set includes all printable ASCII characters as well as some accented letters (), Greek letters, icons, and line-drawing symbols.
ASCII was incorporated into the Unicode (1991) character set as the first 128 symbols, so the 7-bit ASCII characters have the same numeric codes in both sets. This allows UTF-8 to be backward compatible with 7-bit ASCII, as a UTF-8 file containing only ASCII characters is identical to an ASCII file containing the same sequence of characters.
128B (Code Set B) – ASCII characters 32 to 127 (0–9, A–Z, a–z), special characters, and FNC 1–4 128C (Code Set C) – 00–99 (encodes two digits with a single code point) and FNC1 The minimum width of the quiet zone to the left and right of the Code 128 is 10x, where x is the minimum width of a module.
The block contains all the letters and control codes of the ASCII encoding. It ranges from U+0000 to U+007F, contains 128 characters and includes the C0 controls , ASCII punctuation and symbols , ASCII digits , both the uppercase and lowercase of the English alphabet and a control character .