bit-paired keyboard - definizione. Che cos'è bit-paired keyboard
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Cosa (chi) è bit-paired keyboard - definizione


bit-paired keyboard         
  • [[Teletype Model 33]] (1963) keyboard, seminal bit-paired keyboard
  • [[ASCII]] table: in bit-paired keyboards, shift corresponds to changing columns.
<hardware> (Obsolete, or "bit-shift keyboard") A non-standard keyboard layout that seems to have originated with the Teletype ASR-33 and remained common for several years on early computer equipment. The ASR-33 was a mechanical device (see EOU), so the only way to generate the character codes from keystrokes was by some physical linkage. The design of the ASR-33 assigned each character key a basic pattern that could be modified by flipping bits if the SHIFT or the CTRL key was pressed. In order to avoid making the thing more of a Rube Goldberg kluge than it already was, the design had to group characters that shared the same basic bit pattern on one key. Looking at the ASCII chart, we find: high low bits bits 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 010 ! " # $ % & ' ( ) 011 0 1 2 3 4 5 6 7 8 9 This is why the characters !"#$%&'() appear where they do on a Teletype (thankfully, they didn't use shift-0 for space). This was *not* the weirdest variant of the QWERTY layout widely seen, by the way; that prize should probably go to one of several (differing) arrangements on IBM's even clunkier 026 and 029 card punches. When electronic terminals became popular, in the early 1970s, there was no agreement in the industry over how the keyboards should be laid out. Some vendors opted to emulate the Teletype keyboard, while others used the flexibility of electronic circuitry to make their product look like an office typewriter. These alternatives became known as "bit-paired" and "typewriter-paired" keyboards. To a hacker, the bit-paired keyboard seemed far more logical - and because most hackers in those days had never learned to touch-type, there was little pressure from the pioneering users to adapt keyboards to the typewriter standard. The doom of the bit-paired keyboard was the large-scale introduction of the computer terminal into the normal office environment, where out-and-out technophobes were expected to use the equipment. The "typewriter-paired" standard became universal, "bit-paired" hardware was quickly junked or relegated to dusty corners, and both terms passed into disuse. [Jargon File] (1995-02-20)
Bit-paired keyboard         
  • [[Teletype Model 33]] (1963) keyboard, seminal bit-paired keyboard
  • [[ASCII]] table: in bit-paired keyboards, shift corresponds to changing columns.
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).
Musical keyboard         
  • scale]]
  • A typical harpsichord keyboard
  • Layout of a musical keyboard (three [[octave]]s shown)
  • The [[Korg Monologue]] synthesizer has 25 slim keys and an E-E range.
  • 88-key piano illustration
  • Praetorius]]' ''[[Syntagma Musicum]]'' (1619). At the top is the earliest example of the "seven plus five" layout. The bottom two illustrate the earlier "eight plus four" arrangement
  • Keyboard of a Letter-Printing Telegraph Set built by [[Siemens & Halske]] in Saint Petersburg, Russia, ca.&nbsp;1900
MUSICAL INSTRUMENT COMPONENT
Piano keyboard; Keyboard (music); Musical keyboards; Non-touch-sensitive musical keyboard; Non-touch-sensitive keyboards; Piano-style Keyboard; Piano Keyboard; Music keyboard; Musical Keyboard; 🎹; Keyboad instruments; Keyboad instrument; Musical keyboard layout; Button (music); Tastatur; Klaviatur
A musical keyboard is the set of adjacent depressible levers or keys on a musical instrument. Keyboards typically contain keys for playing the twelve notes of the Western musical scale, with a combination of larger, longer keys and smaller, shorter keys that repeats at the interval of an octave.

Wikipedia

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).