Keyboard

The following settings affect the behavior of the keyboard and the interpretation of control key sequences issued within a VDM.

KBD_ALTHOME_BYPASS

Function:

When enabled, prevents the Alt+Home key sequence from switching the VDM between full screen and windowed mode. Advantages:

Enabling this setting allows normal behavior for applications which themselves make use of the Alt+Home key sequence. Drawbacks:

When enabled, the user must use the Ctrl+Esc sequence to switch to Presentation Manager from a full screen VDM, then use the context menu of the class to switch the VDM to windowed mode. Default:

Off (Alt+Home will cause a switch between full screen and windowed mode). Settable:

At any time. Examples:

None.

KBD_BUFFER_EXTEND

Function:

Increases a VDM's keyboard type-ahead buffer size. Advantages:

Provides greater keystroke buffering, consistent with the level available in VIO windows. Note that Ctrl-Break will flush the entire buffer, just as it does with the standard buffer. Drawbacks:

Applications which bypass the ROM BIOS input buffer and/or INT 16h may not benefit from this feature. There is also a small amount of additional memory overhead for every VDM. Default:

On. Most applications will benefit, and those that do not should not be adversely affected. Settable:

At any time. This facilitates easy experimentation by the user in the (rare) event that a problem does arise. Examples:

None.

KBD_CTRL_BYPASS

Function:

When enabled, inhibits one or more control key sequences, allowing an application in the VDM to use these sequences for its own purposes. Advantages:

Enabling this setting allows normal behavior for applications which make use of control key sequences normally used by OS/2 Version 2.0. Drawbacks:

Enabling this setting may prevent certain operations from being performed with OS/2 Version 2.0 and the Workplace Shell. Default:

NONE (All control key sequences behave in the normal manner). Settable:

At any time. Examples:

None.

KBD_RATE_LOCK

Function:

Prevents a DOS application in a VDM from changing the system keyboard repeat rate. Advantages:

Insulates machine from applications that modify the repeat rate in an uncontrolled or undesirable way. Drawbacks:

Prevents the application's repeat rate from taking effect even when the application is the focus session. Default:

Off. Most applications do not modify the repeat rate, and those that do are generally in accordance with the user's wishes. Settable:

At any time. Examples:

None.

[Back: Idle Detection]
[Next: Memory Extenders (EMS and XMS)]