Английская Википедия:ECMA-23
ECMA-23 is a standard for a bit-paired keyboard layout adopted in 1969 and revised in 1975. As a bit-paired layout, shifted keys correspond to toggling bits in the ASCII keycode. This is most visible in the digits on the top row, where shifting Шаблон:Keypress give Шаблон:Keypress, and Шаблон:Keypress, Шаблон:Keypress and Шаблон:Keypress 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 Japanese keyboard layout.
Technical details
- The Шаблон:Keypress and Шаблон:Keypress 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-Шаблон:Keypress with Шаблон:Keypress a singleton key, or with Shift-Шаблон:Keypress with Шаблон:Keypress a singleton key.
- Underline may be generated with Shifted-Шаблон:Keypress instead of with its own key. If this is done then Shift-Шаблон:Keypress is used to generate character 96.
- If a key is labelled Шаблон:Keypress it should be at the top-right; if a key is labelled Шаблон:Keypress it should be at the bottom-right.
- If the key to the left of Шаблон:Keypress is not Шаблон:Keypress, it is Шаблон:Keypress.
The most common layouts are:
- "BBC Micro": ECMA23/ANSI with Shift-Шаблон:Keypress generating character 96
- "Japan": ECMA23/ANSI with Shift-Шаблон:Keypress generating character 96 and an extra key to the right of Шаблон:KeypressШаблон:Keypress generating Шаблон:KeypressШаблон:Keypress
- "PC": ECMA23/ISO with Shift-Шаблон:Keypress generating character 96
Examples
Acorn Atom and Acorn System[1] | ECMA23/ANSI | Шаблон:Keypress Шаблон:Keypress Шаблон:Keypress Шаблон:Keypress Шаблон:Keypress shuffled |
RS2376 keyboard[2] | ECMA23/ISO | character 96 generated with Shift-Шаблон:Keypress |
BBC Microcomputer series[3] | ECMA23/ANSI | character 96 as £ generated with Shift-Шаблон:Keypress |
Amstrad CPC[4] | ECMA23/ANSI | Шаблон:KeypressШаблон:Keypress and Шаблон:KeypressШаблон:Keypress swapped, Шаблон:Keypress moved, Shift-Шаблон:Keypress and Shift-Шаблон:Keypress swapped, Шаблон:Keypress in the Шаблон:Keypress location |
Notes
External links