LCARS Screen Saver

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System Requirements

LCARS Screen Saver version 1.21 is a standard 32-bit Windows screen saver.

I have tested the various LCARS versions under:

I have tested version 1.00 (but not yet version 1.20) under:

The screen saver will run on any computer that supports these operating systems. The minimum system tested so far was a 386/16 with 2 mgb RAM. The screen saver ran slowly, but reliably!

Many of you have reported problems with Windows 98. This problem was fixed in version 1.20. See LCARS Technical Support for more information.


The LCARS screen saver is a standard Windows screen saver. All versions are set up the same way.
  1. Download the compressed ZIP file.
    1. Click the "Download" button on the LCARS Main page.
    2. Select a download location and save the file.
  2. Prepare the files.
    1. If you have a regular zip file (like, use a utility like WinZip or PkUnzip to unzip the file.
    2. If you have the self-extracting zip (like LcarsZip.exe), it will unzip itself when you run it.
    3. Unzip the file in a temporary directory so that you will not overwrite any other files with the same names.
    4. After you unzip, you will have three files - "ReadMeLc.txt", "Lcars32.scr" and "Lcars.scr".
    5. Read the "ReadMeLc.txt" file for information about the version you have downloaded.
    6. Copy the "Lcars32.scr" file into your Windows directory with your other screen savers. (On most computers, the Windows directory is "C:\Windows".)

      (If you are running Windows 3.11 or earlier, you must use the "Lcars.scr" file instead.)
  3. Install and configure the screen saver.
    1. Go to the Windows screen saver dialog.
      • On newer systems like Windows 98, select "Start", "Settings", and "Control Panel". Then, double-click the "Display" icon and click the "Screen Saver" tab.
      • On older systems like Windows 3.1, go the the "Main" group, then double click the "Desktop" icon.
    2. Locate the list of installed screen savers, then scroll down to "LCARS Displays (32 bit)" and select it.
      • If you are running Windows 98, the description will be "Lcars32".
      • If you are runnning the 16-bit version, the description will be "LCARS Displays". Under Windows 98, it will be "Lcars".
    3. Click the "Settings" (or "Setup") button to see the settings dialogs for the LCARS screen saver. Make any changes you want to make, then click OK.
    4. Finally, click OK to close the Windows screen saver dialog.

Technical Information

I tried to make the program as small and efficient as possible. It does not take up much disk space, requires no DLLs, and can be used even with rather old equipment. The whole screen saver is only about 300k bytes.

The program uses Windows API functions to generate the graphics at run time. The graphics are not as detailed as bitmapped images could be, but it correctly scales to different screen sizes, uses less memory and takes up less disk space.

The screens do not have much text on them. That is because it is easy to generate random scrolling numbers, but it is hard to generate sensible, non-repeating text without writing it in advance and storing it in the program.

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Steve Bownas -
Last update August 18, 2002