4DO
An open-source, low-level emulator based on the FreeDO source code.
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Home  /  Uncategorized  /  fourdo.com site: new and improved

fourdo.com site: new and improved

fourdo-admin October 27, 2011 11 Comments

The fourdo.com site has been moved to new web space.

Now that the move is complete, I’ve added a both a forum and a wiki. I don’t have particularly grand plans for either of these, but here’s the immediate main use for each of them:

  • Forum – Bug reports and investigation
  • Wiki – Game compatibility list
If you are interested in helping me out by moderating either the forum or the wiki, please let me know using a private message in the forums.
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11 Comments

  1. petya Log in to Reply
    November 10, 2011 at 9:07 am

    jonny, ia want to be a beta-tester of 4do!!!

    • Johnny Log in to Reply
      November 12, 2011 at 3:06 pm

      Hi petya,

      Beta testing is ongoing and open! You can download 4DO and leave feedback or report bugs on the 4DO forum. Thanks for the interest!

  2. petya Log in to Reply
    November 15, 2011 at 9:55 am

    Johnny, i want to tell you about some bugs of emulator, wing commander 3 dont work correctly, there are bugs in colours!
    ps sorry for my bad english, because iam not english man. =)

    • BryWI Log in to Reply
      November 16, 2011 at 9:55 am

      I have noticed this bug too. It would appear to be a FreeDO Core bug because it happens even worse in FreeDO. I will add this to the compatibility wiki.

  3. petya Log in to Reply
    December 27, 2011 at 11:30 am

    The new year soon, the best gift of course the emulator))

  4. Rain Log in to Reply
    December 31, 2011 at 5:54 am

    Hi Johnny,
    I was wondering if you planned to develop the emulation for the following things (of course with lower priority compared to the bug-fixing!!!):

    – light gun (emulated through the mouse)
    – playing Audio CD through the 3DO’s main interface

    By the way, it’s long time you don’t publish a new version of 4DO! 🙂 Why?

    Thanks for your excellent work and happy new year.

    Best regards.

    • BryWI Log in to Reply
      December 31, 2011 at 7:26 pm

      I believe an attempt was made to actually get Audio CDs to play through the emulator, but was not successful yet.

      No Idea about light guns though.

    • Johnny Log in to Reply
      January 23, 2012 at 12:59 am

      I would like to get light gun support added. I also want to get flight stick added. I’m unsure how successful I’ll be with this. I’ve asked around for anybody that has either one of these. If there’s a game that has a control configuration screen that will inform the user that “flightstick was just plugged in” or something, then I’ll be able to spam the input buffers with random bits in hopes that I figure out what the exact match is for the device.

      If this avenue doesn’t work, I would have to try to disassemble 3DO code. in which case it may be so hard that I give up.

      I was able to figure out the correct input bits for the “gamepad” support by disassembling and debugging FreeDO. It took a while but I found it! However, FreeDO never supported the flightstick or lightgun, so this isn’t an option.

      Alas, I tried for a while to get audio CD support working. I assumed it would be pretty simple once the BIOS was working. Some reason the bios didn’t react at all to the presence of an audio CD. I get the feeling it’s not going to be that easy. I suspect it was due to incomplete development on the CD drive emulation in the FreeDO core. So, I think it would take a focused effort, and I doubt it’ll get done unless someone else hops in to help.

  5. Johnny Log in to Reply
    January 23, 2012 at 12:52 am

    Hey, just an FYI for those interested, I’ve picked up work again on 4DO after the new year. I had a bad wave of work for a while there.

  6. Sedabi Log in to Reply
    January 24, 2012 at 4:26 pm

    Hi John. I am very glad that you came back. Work awaits the competitors do not sleep)))
    Explain why you removed the option to adjust the speed of the processor with the source of the project FREEDO 2?
    And you come up with something with a screen? at the moment the emulator displays 60 frames, and progamma to record video games (Fraps) show as many as 2000 frames.
    People on the load card overheat. Why such a burden at all on the video card? – It means the calculation of the image is the processor, carefully studied the key problems please.
    And yet …. I like it asked you to come up with something in the derivation of interpolated images.
    At this point you have 320×240 stretched to fill the screen when switching to full screen.
    Why do not you do normal interpolation frame?
    Make at least scale
    Keep up your project and wish you very good luck.
    Sincerely Sedabi.

    • Johnny Log in to Reply
      January 26, 2012 at 8:57 pm

      Hi Sedabi, I appreciate the feedback!

      Regarding FRAPS and the high FPS (more than 60), I believe I have a solution to the problem. The DirectX rendering logic I had in previously was lazy and rendering in all available idle GPU time. I have a change checked in that will get I’ll be releasing soon.

      I do not know if or when I will add any features that take advantage of the processor speed setting that was on the latest versions of FreeDO. I haven’t looked into the details of how I should add the feature. But, I can at least let you know that I know the feature you’re referring to.

      I have looked into doing 640×480 rendering before, but this performs poorly. This is another feature I’m not yet sure how to work into 4DO. This is due to “software rendering” being slow. I suspect I will probably not add this feature. Ultimately, I hope that Altmer completes a prototype with hardware-accelerated graphics and someday chooses to share it with me. 🙂

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