D-pad

A D-pad (short for directional pad; also known as a control pad) is a flat, usually thumb-operated four-way directional control with one button on each point, found on nearly all modern video game console gamepads, game controllers, on the remote control units of some television and DVD players, and smart phones. Like early video game joysticks, the vast majority of D-pads are digital; in other words, only the directions provided on the D-pad buttons can be used, with no intermediate values. However, combinations of two directions (up and left, for example) do provide diagonals and many modern D-pads can be used to provide eight-directional input if appropriate.

Although digital D-pads offer less flexibility than analog sticks, they can easily be manipulated (requiring little movement of the thumb) with very high accuracy. They are also far less demanding in maintenance and do not protrude very far from the controller, making them ideal for portable consoles such as the Game Boy, DS and the PSP.

D-pads have appeared on other kinds of electronic equipment, including A/V remote controls (especially since the appearance of DVD players, which are heavily menu driven), calculators, PDAs, smartphones, and car stereos such as the AutoPC.

A precursor to the D-pad was the four directional buttons used in arcade games such as UPL's Blockade (1976) and SNK's Vanguard (1981). A precursor to the standard D-pad on a video game console was used by the Intellivision, which was released by Mattel Electronics in 1980. The Intellivision's unique controller featured the first alternative to a joystick on a home console, a circular pad that allowed for 16 directions of movement by pressing it with the thumb. A precursor to the D-pad also appeared on Entex's short lived "Select A Game" cartridge based handheld system; it featured non-connected raised left, right, up and down buttons aligned to the left of a row of action buttons. Similar directional buttons were also used on the Atari Game Brain, the unreleased precursor to the Atari 2600, and on some early dedicated game consoles such as the VideoMaster Star Chess game. A controller similar to the D-pad appeared in 1981 on a handheld game system: Cosmic Hunter on Milton Bradley's Microvision; it was operated using the thumb to manipulate the onscreen character in one of four directions.

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