Perixx PERIBOARD-409P Wired PS2 Mini Keyboard, Black, UK Layout

Product Information

PS/2 connectors are not designed to be plugged in and out very often, which can lead to bent or broken pins. Additionally, PS/2 connectors only insert in one direction and must be rotated correctly before attempting connection. (If a user attempts to insert the connector in the wrong orientation and then tries to rotate it to the correct orientation without first pulling it out, then bent pins could result.) Keyboard and mouse ports may be combined into a single port which can be used to connect both by splitter cable. Also note that (for example) a "WASD" game doesn't care if the keys are 'W', 'A', 'S' and 'D'. The game wants to know about keys in a specific "T-shaped" pattern on the left of the keyboard. If the keyboard happens to be something different, then the keys in the same location may be completely different (e.g. they would be '<', 'A', 'O' and 'E' keys on a Dvorak keyboard). This helps to explain my preference of having an 8-bit key code where the highest 3 bits determine which row on the keyboard and the lowest 5 bits determine which column (it's easy for a game to ask about the state of the third key on the left of the third row). Keyboards are pretty universal and can work with any desktop, laptop, or portable computer (PC or Mac) with the required keyboard port. When you plug a keyboard into a computer, it should immediately start working. With some more advanced keyboards with special keys or features, those features may not work until the software is installed. If the software is not compatible with your computer or operating system, you can continue to use the basic keyboard functions without the special features. If nothing on the keyboard works, you'll need to troubleshoot the keyboard with one of the links mentioned below. Can I plug my PC keyboard into my Apple computer?

No, it’s absolutely correct. The information there is not talking about the physical connection, but the protocol being used to communicate with the device. If you have a PS/2 keyboard make sure it was connected before booting Ubuntu. To complete the steps below you will need to connect a USB keyboard. In contrast to this, the PS/2 mouse interface is substantially different from RS-232 (which was generally used for mice on PCs without PS/2 ports), but nonetheless many mice were made that could operate on both with a simple passive wiring adapter, where the mice would detect the presence of the adapter based on its wiring and then switch protocols accordingly.If replugging or the Virtual Terminal works then goto step 6. If it doesn't work you should use either the PS/2 keyboard or the second machine in the LAN to login to your machine of which the keyboard stopped working. If your second machine is Linux use the command ssh user@host, if it is Windows use putty.

All other bytes sent by the keyboard are scan codes, where interpretation depends on the currently selected scan code set. There is no standard for "key codes" - it's something you have to make up or invent for your OS. I personally like the idea of having an 8-bit key code where the highest 3 bits determine which row on the keyboard and the lowest 5 bits determine which column (essentially, the keyboard is treated as a grid of up to 8 rows and up to 32 columns of keys). Regardless of what you choose to use for your key codes, it should be something that is used by all keyboard drivers (including USB Keyboards) and could possibly also be used for other input devices (e.g. left mouse button might be treated as "key code 0xF1"). Older PS/2-only peripherals can be connected to a USB port via an active converter, which generally provides a pair of PS/2 ports (which may be designated as one keyboard and one mouse, even though both ports may support both protocols) at the cost of one USB port on the host computer. [14] Color code [ edit ] Compaq keyboard with non-standard colored PS/2 connector (orange) Color / Pantone Theoretically, USB suffers from performance problems when many devices are connected to the computer simultaneously. For example, when a printer, scanner, and webcam simultaneously place data transfer demands on USB, those devices are forced to share the available bandwidth. This can lead to errors. In my experiences, plugging a mouse into either one would work, but the keyboard would only work on its port (or was it the other way around, I don't remember)Here, the controller limits the number of keys that can send input at any given time. Usually, only the signal from two keys, as well as the Shift and Function keys, are allowed. This is known as 2KRO. The restriction also represents the simplest anti-ghosting function. Note: Other bits may be used in international keyboards for other purposes (e.g. a Japanese keyboard might use bit 4 for a "Kana mode" LED). PollingIterations [REG_DWORD] - Specifies the maximum number of times Windows 2000 polls the hardware. If the number of trials specified in this entry is exceeded, Windows 2000 stops polling. The PS/2 Keyboard accepts commands and sends responses to those commands, and also sends scan codes indicating when a key was pressed or released. Keep in mind that these scan codes (from the tables below) may be altered (i.e. translated) by the PS/2 controller, depending on the controller's settings.

Despite all of this theory, USB is more or less on equal footing in the real-world, even though PS/2 is faster (more direct) and offers NKRO capability. After all, you're probably not printing documents and gaming at the same time. Really, the only hardware combination we'd be worried about would be a fast storage device connected to the same USB root port, since bus utilization of up to 100% is possible in that situation. If you really needed to, you could always disconnect high-bandwidth USB devices when they aren't being used. Just like the name suggests, a keyboard driver is a set of files or data that allows the keyboard to run on your system with ease. The driver defines how a device, in this case, the keyboard, will respond to your commands as a user. Some more advanced USB keyboards (e.g., gaming USB keyboard) have two USB cables. One of these cables is for the keyboard, and the other is for USB port(s) on the keyboard for other USB devices. If you only need the keyboard, only one of these cables can be connected. Connecting a wireless keyboard Newer computers no longer have PS/2 ports. If you have a PS/2 keyboard and a computer with no PS/2 ports, we suggest purchasing a USB keyboard or a PS/2 to USB converter. Do all computers have a PS/2 port?

Device

EnableWheelDetection [REG_DWORD] – Determines whether the driver attempts to detect and enable the wheel on the mouse device. Some devices are equipped with a mouse wheel to provide rapid scrolling and other control features if supported by an application. Attach as separate attachments to your bug report ~/dmesg_boot, ~/dmesg_diff, ~/Xorg.0.log and ~/Xorg.0.log_diff. ResendIterations [REG_DWORD] – Specifies the maximum number of times a hardware operation is attempted. If the number of trials exceeds the value of this entry, Windows considers the operation to have failed.