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Symbols for Legacy Computing is a Unicode block containing graphic characters that were used for various home computers from the 1970s and 1980s and in teletext broadcasting standards. It includes characters from the Amstrad CPC character set, Amstrad CPC, MSX character set, MSX, Mattel Aquarius, RISC OS character set, RISC OS, MouseText, Atari ST character set, Atari ST, TRS-80 Color Computer, Oric computers, Oric, TI-99/4A, Texas Instruments TI-99/4A, TRS-80 character set, TRS-80, Minitel, Teletext character set, Teletext, ATASCII, PETSCII, ZX80 character set, ZX80, and ZX81 character set, ZX81 character sets. Semigraphics characters are also included in the form of new block-shaped characters, line-drawing characters, and 60 "sextant" characters (semigraphic character made up of six smaller blocks). Additional characters were added to this block in Unicode 16.0 as well. A supplemental block (Symbols for Legacy Computing Supplement) was added with Unicode 16.0. Block The imag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PETSCII
PETSCII (PET Standard Code of Information Interchange), also known as CBM ASCII, is the character set used in Commodore Business Machines' 8-bit home computers. This character set was first used by the PET from 1977, and was subsequently used by the CBM-II, VIC-20, Commodore 64, Commodore 16, Commodore 116, Plus/4, and Commodore 128. However, the Amiga personal computer family instead uses standard ISO/IEC 8859-1. History The character set was largely designed by Leonard Tramiel (the son of Commodore CEO Jack Tramiel) and PET designer Chuck Peddle. The graphic characters of PETSCII were one of the extensions Commodore specified for Commodore BASIC when laying out desired changes to Microsoft's existing 6502 BASIC to Microsoft's Ric Weiland in 1977.mirror The VIC-20 used the same pixel-for-pixel font as the PET, although the characters appeared wider due to the VIC's 22-column screen. The Commodore 64, however, used a slightly re-designed, heavy upper-case font, es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MouseText
MouseText is a set of 32 graphical characters designed by Bruce Tognazzini and first implemented in the Apple IIc. They were then retrofitted to the Apple IIe forming part of the Enhanced IIe upgrade. A slightly revised version was then released with the Apple IIGS. By including box-drawing characters, MouseText made it possible to display simple text user interfaces resembling the Macintosh graphical user interface. Since the Apples lacked the ability to display user-defined characters in text mode, all GUI-like displays beyond crude ASCII art approximations had to use the slower and more memory-hungry graphical mode before MouseText was available. MouseText resulted in an eightfold increase in display speed for mouse applications, bringing such text-based applications as word processors up to the same speed as the original Macintosh. Word processors running on the two computers would not be confused with one another, however, as the mouse under MouseText would move in discrete j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MSX Character Set
MSX character sets are a group of single- and double-byte character sets developed by Microsoft for MSX computers. They are based on code page 437. Character sets The following table shows the MSX character set. Each character is shown with a potential Unicode equivalent if available. Control characters and other non-printing characters are represented by their names. Character set differences exist, depending on the target market of the machine. These are the variations: * Arabic * Brazilian * German DIN * International * Japanese * Korean * Russian The German DIN and International character sets are identical, apart from the style of zero (0) character. The international character set has a zero with a slash, while the DIN character set has a dotted zero. The MSX terminal is compatible with VT52 escape codes, plus extra control codes shown below. Brazilian variants Gradiente custom charset The Brazilian manufacturer Gradiente have initially included a modifie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Committee For Information Technology Standards
The InterNational Committee for Information Technology Standards (INCITS), (pronounced "insights"), is an ANSI-accredited standards development organization composed of Information technology developers. It was formerly known as the X3 and NCITS. INCITS is the central U.S. forum dedicated to creating technology standards. INCITS is accredited by the American National Standards Institute (ANSI) and is affiliated with the Information Technology Industry Council, a global policy advocacy organization that represents U.S. and global innovation companies. INCITS coordinates technical standards activity between ANSI in the US and joint ISO The International Organization for Standardization (ISO ; ; ) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries. Me .../ IEC committees worldwide. This provides a mechanism to create standards that will be implemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX81 Character Set
The ZX81 character set is the character encoding used by the Sinclair Research ZX81 family of microcomputers including the Timex Sinclair 1000 and Timex Sinclair 1500. The encoding uses one byte per character for 256 code points. It has no relationship with previously established ones like ASCII or EBCDIC, but it is related though not identical to the character set of the predecessor ZX80. Printable characters The character set has 64 unique glyphs present at code points 0–63. With the most significant bit set the character is generated in inverse video; corresponding to code points 128–191. These 128 values are the only displayable ones allowed in the video memory (known as the display file). The remaining code points (64–127 and 192–255) are used as control characters such as 118 for newline or, uniquely to Sinclair BASIC, for keywords, while some are unused. The small effective range of only 64 unique glyphs precludes support for Latin lower case letters, and many sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semigraphics
Text-based semigraphics, pseudographics, or character graphics is a primitive method used in early text mode video hardware to emulate raster graphics without having to implement the logic for such a display mode. There are two different ways to accomplish the emulation of raster graphics. The first one is to create a low-resolution all points addressable mode using a set of special characters with all binary combinations of a certain subdivision matrix of the text mode character size; this method is referred to as block graphics, or sometimes mosaic graphics. The second one is to use special shapes instead of glyphs (letters and figures) that appear as if drawn in raster graphics mode, sometimes referred to as semi- or pseudo-graphics; an important example of this is box-drawing characters. Semigraphical characters (including some block elements) are still incorporated into the BIOS of any VGA compatible video card, so any PC can display these characters from the moment it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbols For Legacy Computing Supplement
Symbols for Legacy Computing Supplement is a Unicode block containing additional graphic characters that were used for various home computers from the 1970s and 1980s, extending the set of characters provided by the Symbols for Legacy Computing block. It includes characters from Amstrad CPC, Apple II, Apple 8-bit, Kaypro CP/M, Mattel Aquarius, Ohio Scientific, Robotron KC 85, Robotron KC, Sharp MZ computers, HP Inc., HP terminals, and TRS-80. It includes a set of semigraphics in the form of 230 "octant" characters, large images split into four "characters", and the "large type" characters used for building large text characters. Block History The following Unicode-related documents record the purpose and process of defining specific characters in the Symbols for Legacy Computing Supplement block: Implementation The glyphs for the ''Symbols for Legacy Computing Supplement'' block have been added to the Cascadia Code (2404.03 release or later), GNU Unifont (version 16.0.01 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbols For Legacy Computing Unicode Block
A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise different concepts and experiences. All communication is achieved through the use of symbols: for example, a red octagon is a common symbol for " STOP"; on maps, blue lines often represent rivers; and a red rose often symbolizes love and compassion. Numerals are symbols for numbers; letters of an alphabet may be symbols for certain phonemes; and personal names are symbols representing individuals. The academic study of symbols is called semiotics. In the arts, symbolism is the use of a concrete element to represent a more abstract idea. In cartography, an organized collection of symbols forms a legend for a map. Etymology The word ''symbol'' derives from the late Middle French masculine noun , which appeared around 1380 in a theological sense signifying a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unicode
Unicode or ''The Unicode Standard'' or TUS is a character encoding standard maintained by the Unicode Consortium designed to support the use of text in all of the world's writing systems that can be digitized. Version 16.0 defines 154,998 Character (computing), characters and 168 script (Unicode), scripts used in various ordinary, literary, academic, and technical contexts. Unicode has largely supplanted the previous environment of a myriad of incompatible character sets used within different locales and on different computer architectures. The entire repertoire of these sets, plus many additional characters, were merged into the single Unicode set. Unicode is used to encode the vast majority of text on the Internet, including most web pages, and relevant Unicode support has become a common consideration in contemporary software development. Unicode is ultimately capable of encoding more than 1.1 million characters. The Unicode character repertoire is synchronized with Univers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
