4DO
An open-source, low-level emulator based on the FreeDO source code.
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Monthly Archives: March 2012

4DO 1.1.6.5 Beta Released!

fourdo-admin March 26, 2012 5 Comments

There are no functional changes in 1.1.6.5 beta. This release provides the introduction of the 4DO installer. If you find an issue, please provide feedback!

4DO will continue to provide an option for the Zip file distribution, since many people prefer that option. As you can see on the download page, each release will now provide two ways you to download and use 4DO:

  • Using an installer – Such as 4DO_1.1.6.5_beta_Install.exe
  • Using the zip file – Such as 4DO_1.1.6.5_beta.zip

If you try out the installer and find issues, please leave a comment!

If you want to try 4DO 1.1.6.5 beta, head to to the download page:
4DO Downloads

4DO 1.1.6.4 Beta Released!

fourdo-admin March 20, 2012 11 Comments

More incremental improvements, including one more playable game!

Improvements:

  1. Seal of the Pharoah now fully playable.
  2. Video timing fix for The Horde
  3. Improved timing fixes for Wing Commander 3 – Freezes now occur much less often, but can still sometimes occur.
  4. Graphical rendering fix for Pebble Beach Golf Links font issue – This may also affect other games, but I have not seen any occurrences.
  5. Russian translations improved – Provided by Sedabi!
  6. Alt+Enter now toggles full screen mode.
  7. A couple French translation improvements.

If you want to try 4DO 1.1.6.4 beta, head to to the download page:
4DO Downloads

4DO 1.1.6.3 Beta Released!

fourdo-admin March 11, 2012 14 Comments

Lots of improvements!

Improvements:

  1. Wing Commander 3 video rendering fixed. It took me quite a while to track down the problems, but the video rendering in Wing Commander 3 is now fixed! Additionally, Viktor has added some freeze fixes to resolve several of the freezes seen when playing videos! As a result, the game is now quite playable! Please be aware that I have still run into a couple freezes during the videos a couple times. If you happen to find a reproducible case, please leave a comment!
  2. Timing / freeze fixes. Viktor has added timing behavior to work around occasional loading screen freezes in these games:
    – Immercenary
    – Scramble Cobra
    – Twisted (EU version)
    – Street Fighter II (There were no known freezes for this one, this is just a timing fix)
  3. As a result of the rendering fixes, some of issues seen in other games are also fixed. Known examples (spotted by Viktor) are:
    – The Horde
    – Jurassic Park – in the car mission
    – Wicked 18 – fonts fixed
    – more?
  4. Spanish translations correctly added. I neglected to release the translated files in 1.1.6.2! (Translations contributed by Antonio “Bloodbat” Ramirez!)
  5. This version also includes some corrections to the French translations.

I dug into the CEL rendering logic and documentation enough to understand the bugs causing Wing Commander 3’s video issues. It took the whole week! I finally saw the resulting clean images at about 4:30am last night 🙂 .

If you want to try 4DO 1.1.6.3 beta, head to to the download page:
4DO Downloads

4DO 1.1.6.2 Beta Released!

fourdo-admin March 04, 2012 8 Comments

Several games newly supported in this update!

Improvements:

  1. Game fixes. Provided by Viktor! This involves changes that resolves the remaining freezing issues seen in Phoenix 3. These fixes also make the following games fully playable:
    – Twisted
    – Space Hulk
    – Games published by “American Laser Games” (Drug Wars, Mad Dog McCree, Crime Patrol, Space Pirates, etc.)
  2. Spanish translations added. Contributed by Antonio “Bloodbat” Ramirez!
  3. Ability to specify game file/drive via command . Similarly, users may also request fullscreen on startup. See details below.
  4. Graphical transparency fix. Resolves certain overly-transparent features in Immercenary. Possibly other games, but I could not find others exhibiting the issue.
  5. This version also includes some corrections and improvements to the French and Chinese (simplified) translations.

Those looking to load games from the command line may now do so with the new command line options available:

======================================================================
= 4DO (1.1.6.2) command line options usage =
= Basic usage: 4DO.exe [-option value][/option "value"][--switch] =
======================================================================

-StartLoadFile [filename] : Loads a game from file.
-StartLoadDrive [letter] : Loads from CD of the drive letter.
--StartFullScreen : Start Full Screen.

If you want to try 4DO 1.1.6.2 beta, head to to the download page:
4DO Downloads

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