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ECMA-23
Ecma_International, ECMA-23 is a standard for a bit-paired keyboard layout adopted in 1969 and revised in 1975. As a bit-paired layout, shift key, shifted keys correspond to toggling bits in the ASCII keycode. This is most visible in the numerical digit, digits on the top row, where shifting give , and , and are paired. The ECMA-23 layout has two options, being the same as the ISO 2530 or the ANSI-X4.14 bit-paired layout. In the UK, ECMA-23 layout keyboards were used on most 8-bit computers such as the Acorn BBC computers and the earlier Atom and Systems, the Amstrad CPC series, and (to an extent) the ZX Spectrum. While bit-paired layouts have generally given way to typewriter layouts it remains as the Keyboard layout#Japanese, Japanese keyboard layout. Technical details * The and keys may be at the left as per ISO2530 or at the right as per ANSI-X4.14. * Character 96 is generated either with Shift- with a singleton key, or with Shift- with a singleton key. * Underli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bit-paired Keyboard
A bit-paired keyboard is a keyboard where the layout of shifted keys corresponds to columns in the ASCII (1963) table, archetypally the Teletype Model 33 (1963) keyboard. This was later contrasted with a typewriter-paired keyboard, where the layout of shifted keys corresponds to ''electric'' typewriter layouts, notably the IBM Selectric (1961). The difference is most visible in the digits row (top row): compared with mechanical typewriters, bit-paired keyboards remove the _ character from 6 and shift the remaining &*() from 7890 to 6789, while typewriter-paired keyboards replace 3 characters: from " to @ from _ to ^ and from ' to *. An important subtlety is that ASCII was based on mechanical typewriters, but electric typewriters became popular during the same period that ASCII was adopted, and made their own changes to layout. Thus differences between bit-paired and (electric) typewriter-paired keyboards are due to the differences of both of these from earlier mechanical ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KBD RS2376
KBD may refer to: * K-B-D, a Semitic triliteral root meaning "be heavy" * KBD algorithm, for simulating spin models *Kabardian language (ISO 639 code), North Caucasus *Kaiser–Bessel-derived window, in digital signal processing *Kashin–Beck disease Kashin–Beck disease (KBD) is a chronic condition, chronic, endemic (epidemiology), endemic type of osteochondropathy (disease of the bone) that is mainly distributed from northeastern to southwestern China, including 15 provinces of China, provi ..., a bone disease * Kentucky Bourbon Distillers * King's Bench Division *, the HTML element for keyboard input {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC Micro Front Restored
#REDIRECT BBC Here i going to introduce about the best teacher of my life b BALAJI sir. He is the precious gift that I got befor 2yrs . How has helped and thought all the concept and made my success in the 10th board exam. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KBD DellECMA
KBD may refer to: * K-B-D, a Semitic triliteral root meaning "be heavy" * KBD algorithm, for simulating spin models *Kabardian language (ISO 639 code), North Caucasus *Kaiser–Bessel-derived window, in digital signal processing *Kashin–Beck disease Kashin–Beck disease (KBD) is a chronic condition, chronic, endemic (epidemiology), endemic type of osteochondropathy (disease of the bone) that is mainly distributed from northeastern to southwestern China, including 15 provinces of China, provi ..., a bone disease * Kentucky Bourbon Distillers * King's Bench Division *, the HTML element for keyboard input {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KBD IBMJP
KBD may refer to: * K-B-D, a Semitic triliteral root meaning "be heavy" * KBD algorithm, for simulating spin models *Kabardian language (ISO 639 code), North Caucasus *Kaiser–Bessel-derived window, in digital signal processing *Kashin–Beck disease Kashin–Beck disease (KBD) is a chronic condition, chronic, endemic (epidemiology), endemic type of osteochondropathy (disease of the bone) that is mainly distributed from northeastern to southwestern China, including 15 provinces of China, provi ..., a bone disease * Kentucky Bourbon Distillers * King's Bench Division *, the HTML element for keyboard input {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecma International
Ecma International () is a nonprofit standards organization for information and communication systems. It acquired its current name in 1994, when the European Computer Manufacturers Association (ECMA) changed its name to reflect the organization's global reach and activities. As a consequence, the name is no longer considered an acronym and no longer uses full capitalization. The organization was founded in 1961 to standardize computer systems in Europe. Membership is open to large and small companies worldwide that produce, market, or develop computer or communication systems, and have interest and experience in the areas addressed by the group's technical bodies. It is located in Geneva. Aims Ecma aims to develop standards and technical reports to facilitate and standardize the use of information communication technology and consumer electronics; encourage the correct use of standards by influencing the environment in which they are applied; and publish these standards a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shift Key
The Shift key is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below the home row. The Shift key's name originated from the typewriter, where one had to press and hold the button to shift up the case stamp to change to capital letters; the shift key was first used in the Remington No. 2 Type-Writer of 1878; the No. 1 model was capital-only. On the US layout and similar keyboard layouts, characters that typically require the use of the shift key include the parentheses, the question mark, the exclamation point, and the colon. When the caps lock key is engaged, the shift key may be used to type lowercase letters on many operating systems, though not on macOS. Labeling The keyboard symbol for the Shift key (which is called Level 2 Select key in the international standard series ISO/IEC 9995) is given in ISO/IEC 9995-7 as symbol 1, and in ISO 7000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASCII
ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because of technical limitations of computer systems at the time it was invented, ASCII has just 128 code points, of which only 95 are , which severely limited its scope. All modern computer systems instead use Unicode, which has millions of code points, but the first 128 of these are the same as the ASCII set. The Internet Assigned Numbers Authority (IANA) prefers the name US-ASCII for this character encoding. ASCII is one of the List of IEEE milestones, IEEE milestones. Overview ASCII was developed from telegraph code. Its first commercial use was as a seven-bit teleprinter code promoted by Bell data services. Work on the ASCII standard began in May 1961, with the first meeting of the American Standards Association's (ASA) (now the American Nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Numerical Digit
A numerical digit (often shortened to just digit) is a single symbol used alone (such as "2") or in combinations (such as "25"), to represent numbers in a positional numeral system. The name "digit" comes from the fact that the ten digits (Latin ''digiti'' meaning fingers) of the hands correspond to the ten symbols of the common base 10 numeral system, i.e. the decimal (ancient Latin adjective ''decem'' meaning ten) digits. For a given numeral system with an integer base, the number of different digits required is given by the absolute value of the base. For example, the decimal system (base 10) requires ten digits (0 through to 9), whereas the binary system (base 2) requires two digits (0 and 1). Overview In a basic digital system, a numeral is a sequence of digits, which may be of arbitrary length. Each position in the sequence has a place value, and each digit has a value. The value of the numeral is computed by multiplying each digit in the sequence by its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keyboard Layout
A keyboard layout is any specific physical, visual or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer keyboard, mobile phone, or other computer-controlled typographic keyboard. is the actual positioning of keys on a keyboard. is the arrangement of the legends (labels, markings, engravings) that appear on those keys. is the arrangement of the key-meaning association or keyboard mapping, determined in software, of all the keys of a keyboard; it is this (rather than the legends) that determines the actual response to a key press. Modern computer keyboards are designed to send a scancode to the operating system (OS) when a key is pressed or released: this code reports only the key's row and column, not the specific character engraved on that key. The OS converts the scancode into a specific binary character code using a "scancode to character" conversion table, called the keyboard mapping table. This means that a physical keyb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KBD ECMA23
KBD may refer to: * K-B-D, a Semitic triliteral root meaning "be heavy" * KBD algorithm, for simulating spin models *Kabardian language (ISO 639 code), North Caucasus *Kaiser–Bessel-derived window, in digital signal processing *Kashin–Beck disease Kashin–Beck disease (KBD) is a chronic condition, chronic, endemic (epidemiology), endemic type of osteochondropathy (disease of the bone) that is mainly distributed from northeastern to southwestern China, including 15 provinces of China, provi ..., a bone disease * Kentucky Bourbon Distillers * King's Bench Division *, the HTML element for keyboard input {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn Atom
The Acorn Atom is a home computer made by Acorn Computers Ltd from 1980 to 1982, when it was replaced by the BBC Micro. The Micro began life as an upgrade to the Atom, originally known as the Proton. The Atom was a progression of the MOS Technology 6502-based machines that the company had been making from 1979. The Atom was a cut-down Acorn System 3 without a disk drive but with an integral keyboard and cassette tape interface, sold in either kit or complete form. In 1980 it was priced between £120 in kit form, £170 () ready assembled, to over £200 for the fully expanded version with 12 KB of RAM and the floating-point extension ROM. Hardware The minimum Atom had 2 KB of RAM and 8 KB of ROM, with the maximum specification machine having 12 KB of each. An additional floating-point ROM was also available. The 2 KB of RAM was divided between 1 KB of Block Zero RAM (including the 256 bytes of " zero page") and 512 bytes for the screen (text ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
