The two keypads were mechanically constrained such that the two hands always moved in opposite directions.
In the static condition, the two keypads were immobilized (i.e., fixed to the bar) with a center-to-keypad distance of 0 cm (near condition), 17.5 cm (intermediate condition), or 35 cm (far condition).
(1) Shift one zero value (active low) through the 4 input lines ( Y0 to Y3). (2) Y5, Y5 and Y6 all high implies no button push -- bit-wise and the Y port with 0x70 to isolate the three keypad input bits.
This study investigated the effects of age and two keypad types (physical keypad and touch-screen one) on the usability of numeric entry tasks.
To make the project independent from the laboratory computers, we used two keypads and two LC Ds
It was discovered that it is not possible to hook two keypads up to the same port, so in order to use two keypads, a second port and getkey function would have to be added to the code for both games.
The Sony Ericsson Xperia Play is a slide-out phone, but it replaces the keyboard typically on the slide out with a Playstation-style game controller, including the familiar four-button keypads.
The company determined that only one keypad in each of the 63 stores had been hacked.
For instance, the buttons could go away and get replaced with other things so that the device adapts more to the application, instead of trying to funnel every function through a zero-through-nine keypad.
If such gizmos were networked, it would be possible to have, say, just one keypad for a mobile phone, an MP3 music player and a PDA.
