Search results
Results From The WOW.Com Content Network
Note that IBM PC and PC XT keyboards use a different unidirectional protocol with the same DIN connector as AT keyboards, so though a PC or XT keyboard can be connected to PS/2 port using a wiring adapter intended for an AT keyboard, the earlier keyboard will not work with the PS/2 port. (At least, it cannot work with normal PS/2 keyboard ...
PS/2 did not typically support plug-and-play, which means that connecting a PS/2 keyboard or mouse with the computer powered on does not always work and may pose a hazard to the computer's motherboard. Likewise, the PS/2 standard did not support the HID protocol. The USB human interface device class describes a USB HID.
An official PlayStation 2 USB keyboard and mouse came bundled as part of the Linux for PlayStation 2 kit, which turns any original model PS2 into a Linux computer. Any other standard USB keyboard and mouse will also work. In addition to the Linux kit, there were a handful of games that used a keyboard and mouse or just a mouse or trackball.
This layout was more efficient for touch typists but was superseded in the marketplace by that with F-keys along the top. PS/2 released April 1987. There are different versions of the Enhanced keyboard layout: 101 standard US layout double-width Return key (spanning C12 and C13) with a 1.5-width key at D13
The USB-keyboard-in-BIOS problem is not an issue if PS/2-less motherboards implement working USB support; I've only noticed problems on boards with PS/2 ports (e.g. the DG33BU does not support keyboards attached via hubs, and many keyboards have integrated hubs; the GA-D525TUD occasionally fails to reset USB at (re)boot, but there might be a ...
The keyboard controller also handles PS/2 mouse input if a PS/2 mouse port is present. Today the keyboard controller is either a unit inside a Super I/O device or is missing, having its keyboard and mouse functions handled by a USB controller and its role in controlling the A20 line becoming integrated into the chipset's northbridge and then ...
Tandy 1000, SX, and TX use a proprietary 8-pin round DIN connector for the keyboard port that is compatible with the older TRS computers but not compatible with the IBM PC/AT or PS/2 standard. Some scan codes differ between the Tandy 1000 and IBM PC/XT and AT, resulting in software compatibility issues.
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. These mostly consist of a single byte; the low 7 bits identify the key, and the most significant bit is clear for a key press or set for a key ...