Turbo button
Turbo button generally refers to a button (control) on a piece of electonic equipment, which makes the equipment run faster in some way. Its two most popular incarnations are: - On some desktop computers, the Turbo button doubles the clock rate at which the main CPU runs. For example, an Intel 80486 processor could run at 25MHz or 50MHz, depending on the state of the Turbo button mounted on the front of the computer, where the user could easily reach it.
- On some video game controllers, a "Turbo" button (sometimes implemented as a sliding switch instead of a button) determines the repeat rate of another action button. For example, the Nintendo Entertainment System's controller has two action buttons, labelled "A" and "B". Normally, pressing the "A" button will result in the action associated with "A" being done once -- for example, a character will jump once. This happens even when the "A" button is "held down" (depressed continually). A controller's "Turbo" functon will change this held-down functionality, so that the character would jump repeatedly, as if the "A" button were being pressed many times very quickly (a desirable feature in games where, for example, the "A" button fires a projectile).
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