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AmigaOS 4.0 - About OS4 - Miscellaneous

Changing Screen Mode Preferences

Open the Prefs drawer and double click on the ScreenMode icon to display the ScreenMode Preferences. On the left-hand side is a selectable list of Screen Modes, and clicking on one will display the characteristics in the values shown down the right-hand side, as shown below:

Simply select the screen mode that you require. It is a good idea to Click on the Test button first to ensure that the selected resolution will display correctly on your monitor, and then 'Use' if you want to use it without saving, or 'Save' to use it on a permanent basis.

However, if you have recently upgraded to Update 3 you may find that the only settings shown are for 'P96-0:FakeNative:640 x 480', and that you have lost all of your Radeon or Voodoo settings. If this is the case you will need to use the Picasso96Mode facility to restore the Radeon/Voodoo settings.

On the other hand, you may find that the desired setting is not available from the list of options, in which case you can also use the Picasso96Mode facility to create the desired option(s).

Using Picasso96Mode
From the Prefs drawer, double click on the Picasso96Mode icon. You will be greeted with a warning message as follows:

Take heed of the warning, but continue by clicking on the 'Yes' button. What you do next depends on whether you want to restore the Radeon/Voodoo settings, or want to add additional screen modes.

The Picasso96Mode for Picasso96 screen will then display as follows:

    Restoring Lost Settings
  • From the pull down 'Attach setting to' menu select the graphics card to be used for Board0:.
  • Click Save.
  • Another requester will appear giving you the option to re-boot. Reboot.
  • Return to the Screen Modes Preferences to use the new screen mode.
    Adding Additional Screen Modes
  • Drag the left-most icon (shows 'New Item' when clicked) to the Resolutions list.
  • Set the Width and Height to the desired values.
  • You can also edit the Name if desired.
  • Drag the left-most icon again, but this time to the Modes list.
    '256colors...' will appear in the list corresponding to a Depth of Chunky (256 colors).
  • Click on the Depth Options to change it to HiColor
  • Drag the left-most icon to the Modes list once again. A warning message 'The current mode has been changed, do you want to accept these changes?' appears - select 'Yes'.
  • Click on the Depth Options to change it to TrueColour & Alpha
  • Drag the left-most icon to the Modes list once again and reply 'Yes' to the warning message as before.
  • Change Depth to the mode you want.
  • It is now time to adjust the values that have been defaulted to suit the resolution you have specified and your monitor.
  • Make sure the frequencies are within you monitor's specs. (Adjust Clock if necessary - remember that if you are using an LCD screen the refresh rate will be considerably slower than for a CRT screen. If in doubt, consult you monitor's User Guide.)
  • Click the Test button to see if it works.
  • Click Use (or Accept changes in a requester).
  • Click Save.
  • Another requester will appear giving you the option to re-boot. Reboot.
  • Return to the Screen Modes Preferences to use the new screen mode.

Disclaimer: Amiga Auckland have prepared the above information for the use of its members based on our experiences and as such is subject to revision at any time. Amiga Auckland cannot guarantee any of the information and cannot be held accountable for any issues that may result from using it.


Copyright 2005 Amiga Auckland Inc. All rights reserved.
Revised: December 15, 2005.