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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.

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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.

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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.


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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.

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Other suggestions
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Multisync monitor option in early VGA cards

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    #16
    Flicker is a highly personal thing. CRT TV, if viewed by my peripheral vision flickers noticeably. LED Christmas lighting flickers intolerably for me. If I view a hillside filled with homes with mixed incandescent and LED Christmas lighting, I can pick out every LED string from a half-mile away. The reason is simple--Christmas LED strings are fed from the 60Hz line frequency with little or no persistence between half-wave cycles. Most inexpensive LED strings divide the string into two parts, with each half lighting on alternate half-cycles.
    Reach me: vcfblackhole _at_ protonmail dot com.

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      #17
      I know the feeling - but here we run on 50Hz, so it's worse. I've been to people's houses that have (cheap) LED lights inside, and they gave me a headache.
      Bobby.

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        #18
        Originally posted by Xacalite View Post
        Exactly.
        It would be logical for the card to output 15.7 kHz for 200-line modes, 21.8 for 350-line, and 31.5 for 480-line. And 27.9 kHz might be logical for 400-line, ie. VGA text modes.
        But this card doesn't behave this way.

        in Windows 3.1, I was able to get Super VGA in both standard and multisync mode, weird. Anyway, you also forget that both CGA and EGA uses digital RGBI while analog VGA is not able to produce that hence you can't have multisync option to be used for EGA monitor.

        Originally posted by Xacalite View Post
        BTW: you mentioned some success with the 800x600 mode - what kind of monitor were you using?
        I am using 14" CRT multisync monitor which is capable of both analog VGA/RGB and digital RGBI with horizontal sync 15-35Khz.

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          #19
          Originally posted by musicforlife View Post
          Anyway, you also forget that both CGA and EGA uses digital RGBI while analog VGA is not able to produce that hence you can't have multisync option to be used for EGA monitor.
          I don't expect this card to drive EGA monitor, I just point to the fact that using CGA/EGA frequencies would make the card to be more compatible with CGA/EGA timing-sensitive software.
          But this card obviously doesn't output CGA/EGA frequencies, so I can't see any sense in that "multisync" setting of SW1.

          I am using 14" CRT multisync monitor which is capable of both analog VGA/RGB and digital RGBI with horizontal sync 15-35Khz.
          I've tried it with a typical SVGA monitor, 30-70 kHz, and 800x600 doesn't work, just goes into power saving mode, irrelevant of the SW1 setting.
          Perhaps wrong sync polarity, or something...

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            #20
            Could be. I had a Sony 19" monitor a million years ago. It should have worked with a Mac, but for some reason I could never get it to sync with a PowerMacs output. Correct frequencies, correct sync parities. With my Emachines video card it would. I never found out exactly why, but I just chalked it up to sync widths. Or shape etc.

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