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In addition, a few keys send longer scancodes, effectively emulating a series of keys to make it easier for different types of software to process. PC keyboards since the PS/2 keyboard support up to three scancode sets. The most commonly encountered are the "XT" ("set 1") scancodes, based on the 83-key keyboard used by the IBM PC XT and earlier ...
A typical 105-key computer keyboard, consisting of sections with different types of keys. A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, [1] navigation keys for moving the text cursor on the screen, function keys and system command keys—such as Esc and Break—for special actions, and often a numeric keypad ...
United Kingdom version of Apple keyboard. The British version of the Apple Keyboard does not use the standard UK layout. Instead, some older versions have the US layout (see below) with a few differences: the £ sign is reached by ⇧ Shift+3 and the § sign by ⌥ Option+3, the opposite to the US layout.
Print This Now. Mac function keys. The Mac function keys run across the top of your keyboard. The F1-F12 keys can be used for built-in Mac features or as standard function keys.
The Fn key is a form of meta-modifier key, in that it causes the operating system to see altered scancodes when other keys on the keyboard are pressed. This allows the keyboard to directly emulate a full-sized keyboard, so the operating system can use standard keymaps designed for a full-sized keyboard. However, because the operating system has ...
The Apple Keyboard featured a prominent power key above the standard keyboard keys. The triangle icon was used to represent power on in these earlier models. The power key , or power button , is a key found on many computer keyboards during the 1980s and into the early 2000s.
IBM states that AltGr is an abbreviation for alternate graphic. [3] [4]Sun Microsystems keyboard, which labels the key as Alt Graph. A key labelled with some variation of "Alt Graphic" was on many computer keyboards before the Windows international layouts.
When data from the keyboard arrives, the controller raises an interrupt (a keyboard interrupt) to allow the CPU to handle the input. If a keyboard is a separate peripheral system unit (such as in most modern desktop computers ), the keyboard controller is not directly attached to the keys, but receives scancodes from a microcontroller embedded ...