1-10 Chapter 1: General Overview
Each key can be programmed to be a dead key, one single key, or a
two-key combination. Most keys will be single key values. However
some keys may be programmed as a two-key combination. For
example, the combination of Shift and F1 key values may be used to
provide compatibility with the 5932 PS/2 keyboard. A double-zero key
is another potential use for this feature. Any combination of up to two
key values may be assigned to a single plunger on the keyboard.
The registry values can be managed using a simple text editor along
with the operating system supplied registry editor. Alternatively, a
GUI utility (non-supported) is available for visually manipulating the
key assignments in the registry (see Key Re-mapping Registry
Manipulation Tool).
Keylock
Both PS/2 and USB keyboards include a four-position Keylock. All
PS/2 keyboards have a Keylock, whereas in the USB keyboard, it is
optional.
The PS/2 keyboard implements the Keylock as a wedge device. The
USB keyboard implements the Keylock as a separate HID device.
Because USB is designed for plug-and-play (PnP), the presence or
absence of the Keylock is easily detected by the host software.
In both keyboards, placing the key in the L (Locked) position disables
the keyboard. In the PS/2 keyboard, the MSR and the external scanner
port are disabled. In the USB keyboard, the MSR, the Glide Pad and the
external USB port are all disabled.
Key Click
Both PS/2 and USB keyboards provide a small speaker that can be
used to make a key click sound. The exact sound made for key clicks is
programmable in both devices, and the sounds available are
comparable.
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