Features of the PC Session Manager
Use the following guidelines to determine how to set the suspend session memory reserve parameter for DWDOS286:
The suspend session memory reserve parameter has a default value of 100 Kbytes. The minimum amount of memory needed to suspend a session is 50 Kbytes.
If there is a DOS application you want to run during a suspended session that requires more than 100 Kbytes, increase the default value. The maximum setting is 640 Kbytes.
If your personal computer has at least 1 Mbyte of extended memory, and you want to reserve all of the conventional memory for running DOS applications during a suspended session, set the suspend session memory reserve parameter to 640 Kbytes.
Caution
When you suspend a session and exit to DOS, make sure you do not change or delete the temporary swap file.
Otherwise, you will be unable to resume the DWDOS286 session.
The session manager parameter lets you choose whether to run the PC Session Manager.
With the PC Session Manager, you can:
• Start X applications
• Exit from the X server
Without the PC Session Manager, you can exit from the X server by pressing I Ctri/ALT/F10 L
• Pause the X server session, putting the current session on hold
This feature is available only with the PC Session Manager.
3-14 Configuring Your Personal Computer for PC DECwindows Motif
• Suspend the session to return temporarily to DOS, execute DOS commands, then return to your X server session This feature is available only with the PC Session Manager.
• Obtain statistics on the memory used by the X server This feature is available only with the PC Session Manager.
The default for this parameter is ON.
Video Panning Speed
Save Unders
Backing Store
This parameter lets you specify the speed of screen panning when the pointer reaches the outer edge of the screen. The panning range is from 1 (the slowest speed) to 50 (fastest); the default is 20.
This parameter lets you select whether the X server should save the section of a window that is obscured by a new window (for applications that request save unders). With this feature ON, the X application that owns the obscured window does not have to repaint the window when the new window goes away.
This feature improves performance; however, it does use memory.
The default is OFF.
This parameter lets you select whether the X server should save the pixel contents of an entire window in off-screen memory (for applications that request backing stores).
This feature improves performance in restoring the original window whenever an obscuring pull-down menu or pop-up window is removed. If the obscured window is large, however, this feature requires large amounts of memory: as much as 60 Kbytes for monochrome video modes; and up to 100 Kbytes for color video modes.
This feature works best with black and white video modes.
The default for this feature is OFF.
Configuring Your Personal Computer for PC DECwindows Motif 3-15
Pointing Device
The pointing device parameter specifies whether a pointing device has been configured for the personal computer. If this parameter is set to ON, a mouse driver must be loaded for the X server to start.
The default setting is ON.
___________________ Note __________________ _
You can still use the keyboard mouse, even if the pointing device parameter is set to ON.
Pointer Acceleration
The pointer acceleration parameter lets you control how quickly the pointer moves on the screen.
The default is 2.
Pointer Threshold
The pointer threshold parameter determines how soon the pointer acceleration should begin. Enter a setting from 1 to 100; a setting of 1 means that there is no delay.
The default is 1.
Keyboard Mouse Speed
This parameter determines how fast the mouse cursor moves when you use the keyboard mouse. This speed may be from 1 (slowest) to 100 (fastest). The default setting is 4.
Shift Lock State Interpretation
This parameter determines whether the keyboard's ILockl key acts as a shift key for the:
• Entire keyboard, including the numbers on the main keyboard and the keypad (ON)
• Alpha keys on the main keyboard (OFF) The default is OFF.
3-16 Configuring Your Personal Computer for PC DECwindows Motif
Bell Pitch
Bell Duration
The parameter specifies the keyboard bell tone in Hz. The range is 0 (lowest pitch) to 2000 (highest pitch) Hz; the default is 440 Hz.
The bell duration parameter specifies the duration, in milliseconds, of the keyboard bell tone. The range is from 0 to 32000 milliseconds; the default is 100.
___________________ Note "'-________________ _ The bell volume cannot be changed.
Screen Saver Timeout
The screen saver timeout parameter specifies how long an inactive session should wait before the screen goes blank.
You can specify any number of minutes between 0 and 480 (8 hours). A value of 0 disables the screen saver timeout feature.
The default is 30 minutes.
Backward Compatibility
The backward compatibility parameter lets you select whether to support older versions of X applications that are not completely compatible with X Windows System Version 11, Release 4. PC DECwindows Motif is Version 11, Release 4 compatible.
The default is to support older versions (ON).
VMS TCP/IP Timeout
The VMS TCPIIP timeout parameter lets you specify the time, in seconds, before the X server stops an attempt to connect to an X application located on a VMS node that uses the TCP/IP network transport protocol. This parameter applies only if you start X applications automatically (using the application startup information parameter) or from the PC Session Manager.
The default for this parameter (30 seconds) is usually sufficient;
you should increase the number of seconds only if you get a timeout error message when you try to start an X application.
Configuring Your Personal Computer for PC DECwindows Motif 3-17
____________________ Note __________________ _
If you use X applications located on a VMS node that uses TCP/IP, you may also need to change the VMS TCP/IP Prompt parameter.