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Note the DE-9 connector, cryptic mode switch, contrast and brightness controls at front, and the V-Size and V-Hold knobs at rear, which allow the control of the scaling and signal to CRT refresh rate synchronization respectively. Various computer display standards or display modes have been used in the history of the personal computer.
Many high-end LCD televisions now have a 120 or 240 Hz (current and former NTSC countries) or 100 or 200 Hz (PAL/SECAM countries) refresh rate. The rate of 120 was chosen as the least common multiple of 24 fps (cinema) and 30 fps (NTSC TV), and allows for less distortion when movies are viewed due to the elimination of telecine (3:2 pulldown ...
In addition to appearing between the G, H and B keys on a QWERTY keyboard, these devices or similar can also appear on gaming devices as an alternative to a D-pad or analog stick. On certain Toshiba Libretto mini laptops, the pointing stick was located next to the display.
The following is a list of smartphones with a high refresh rate display.The refresh rate is the number of times in a second that a display hardware updates its buffer. It is not to be confused with the touch response rate, which is the frequency that the touchscreen senses input, or the frame rate, which describes how many images are stored or generated every second by the device driving the ...
A Control key (marked "Ctrl") on a Windows keyboard next to one style of a Windows key, followed in turn by an Alt key The rarely used ISO keyboard symbol for "Control". In computing, a Control keyCtrl is a modifier key which, when pressed in conjunction with another key, performs a special operation (for example, Ctrl+C).
The first fully mechanical digital computer, the Z1, operated at 1 Hz (cycle per second) clock frequency and the first electromechanical general purpose computer, the Z3, operated at a frequency of about 5–10 Hz. The first electronic general purpose computer, the ENIAC, used a 100 kHz clock in its cycling unit. As each instruction took 20 ...
On IBM PC compatible personal computers from the 1980s, the BIOS allowed the user to hold down the Alt key and type a decimal number on the keypad. It would place the corresponding code into the keyboard buffer so that it would look (almost) as if the code had been entered by a single keystroke.
The Gold Key is used to invoke single-key functions which may be located on either the main keyboard or the numeric keypad. For example, on the WPS-8 word processing system, the main keyboard key C is marked "CENTR", in gold lettering, on its front surface; the keystrokes GOLD C invoke that word processing function to center the current line of text.