Castle of Illusion

Castle of Illusion

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Whallex Sep 13, 2013 @ 5:03pm
Refresh Rate fix. Works for all games actually!
Well I gave up modifying the .exe to force refresh rates. I'm not even sure if the resolution index is stored in the .exe. It might be stored in that enormous .pak file.

But I digress. I figured out how to solve that god awful 30hz refresh rate in the game when trying to run 1080p in fullscreen mode.

THIS IS FOR ADVANCED USERS ONLY! I AM NOT RESPONSIBLE IF YOU DAMAGE YOUR COMPUTER AND/OR MONITOR!

Open the registry by typing REGEDIT into the search bar in the start menu and pressing enter.

Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw.

Add a new DWORD with name 'ForceRefreshRate'. Set the DECIMAL value (THIS IS IMPORTANT! IF YOU PUT THE WRONG VALUE IN HERE YOU COULD CONCEIVABLY DAMAGE YOUR MONITOR!) equal to your monitor's native refresh rate. Be EXTREMELY careful NOT to put the value as a HEXADECIMAL value!!!

64-bit users also need to do this at HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\DirectDraw.

This forces castle of illusion (and any other DirectX game for that matter) to run at your monitor's refresh rate.

The game will now run at FULL 1080p @ max refresh rate.

To SEGA: Checkmate. I win.

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gvamson Sep 13, 2013 @ 8:25pm 
Works perfectly in addition to your patched "COI.exe". And this is through HDMI, too. Thank you very much!

P.S.: I wonder whether it would work with the Crysis games that force 24Hz through HDMI. Will definitely try it later.
Whallex Nov 4, 2018 @ 2:22pm 
Originally posted by potato:
didn't work for me, also you suck at explaining

Game was officially patched years ago.
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