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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


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There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Rule 2: Stay close to the original topic being discussed
  • If you are starting a new thread choose a reasonable sub-forum to start your thread. (If you choose incorrectly don't worry, we can fix that.)
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To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
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Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
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Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


Reporting problematic posts

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If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.


Other suggestions
  • Use Google, books, or other definitive sources. There is a lot of information out there.
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387sx any performance gain?

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    387sx any performance gain?

    I was just looking at a couple of 386sx systems I had lying around and I noticed that their 387 slot was empty. Does anyone have a 387sx co-processor on their 386sx systems? do you notice any significant performance gain over using cpu alone? I'm looking for a boost in 3d games like Wolfenstein 3d.
    Currently working on new DOS game, Chuck Jones: Space Cop of the Future, Check out my Dev Blog. WARNING: contains rocket powered El Caminos

    Vintage Computers:
    Unitron Apple II clone, 2x Commodore Vic-20, Commodore 64, Commodore 128, Amiga 500, Macintosh Plus, Macintosh SE, AST Premium 286, 3 386sx PCs, Atari TT030
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    #2
    Wolfenstein 3D and a lot of other 386/486-era 3D games don't make use of the FPU, they use fixed-point math instead. (AFAIK, Quake is the first shooter to actually use an FPU. Don't quote me on that, though.) Still, it wouldn't hurt.
    Computers: Amiga 1200, DEC VAXStation 4000/60, DEC MicroPDP-11/73
    Synthesizers: Roland JX-10/SH-09/MT-32/D-50, Yamaha DX7-II/V50/TX7/TG33/FB-01, Korg MS-20 Mini/ARP Odyssey/DW-8000/X5DR, Ensoniq SQ-80, E-mu Proteus/2, Moog Satellite, Oberheim SEM
    "'Legacy code' often differs from its suggested alternative by actually working and scaling." - Bjarne Stroustrup

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      #3
      I have a 386DX-20 machine with a 387DX-20.
      Tried with and without, didn't notice any changes (besides the floating point benchmark that is lol).
      I left it in because it's cool to have the socket filled. Only applications that have been especially written to make use of it will use it - normally CAD and Spreadsheet programs that do lots of floating point math - no idea if Wolf3D does or not (my guess is not but I don't actually know).
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        #4
        Most games dont. that being said, if you are a fan of sim city, it uses the fpu EXTENSIVELY. Its almost a 50% performance boost! Also some flight-sims use the fpu but apart from that, I'd only install one just to satisfy my ocd to fill all available holes.
        It is a mistake to think you can solve any major problems just with potatoes.

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          #5
          Originally posted by luckybob View Post
          Most games dont. that being said, if you are a fan of sim city, it uses the fpu EXTENSIVELY. Its almost a 50% performance boost! Also some flight-sims use the fpu but apart from that, I'd only install one just to satisfy my ocd to fill all available holes.
          does sim city 2000 use the fpu? the game runs a little slow
          Last edited by PgrAm; May 24, 2012, 11:53 AM.
          Currently working on new DOS game, Chuck Jones: Space Cop of the Future, Check out my Dev Blog. WARNING: contains rocket powered El Caminos

          Vintage Computers:
          Unitron Apple II clone, 2x Commodore Vic-20, Commodore 64, Commodore 128, Amiga 500, Macintosh Plus, Macintosh SE, AST Premium 286, 3 386sx PCs, Atari TT030
          sigpic

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            #6
            Originally posted by PgrAm View Post
            does dim city 2000 use the fpu? the game runs a little slow
            None of the documentation mentions the FPU.
            PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

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              #7
              Originally posted by PgrAm View Post
              does dim city 2000 use the fpu? the game runs a little slow
              I never tested 2000, but i know for sure classic does. I'm willing to bet that 2000 does as well. That said, 2000 is going to be slow on a 386 no matter how you slice it.
              It is a mistake to think you can solve any major problems just with potatoes.

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                #8
                Bah, now I need to move my 8087 to the 5160 XT.
                Didn't bother before, but I like my SimCity :/
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