Forum Rules and Etiquette

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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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Rule 1: Remain civil and respectful

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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.

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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

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

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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  • Spelling and grammar are not rated, but they do make a post easier to read.
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Everex EV-640 8-bit video card

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  • pianoman72
    Assuming that this card could use Hercules mode, would it be ok to use it alongside/as a secondary option to an IBM CGA card? If so, would there be any conflicts? Since I don't know the jumper pin positions yet, I have to experiment with both CGA and MDA monitors, to see which one would work with the Everest EV-640 card.

    I am thinking to add this card to my IBM XT with CGA setup, which uses a real CGA card and monitor. Of course, my main concern is not blowing up either the IBM 5153 or 5151 monitors.

    Any thoughts on the safest way to proceed with this?
    Thank you all.

    Leave a comment:

  • pianoman72
    Chuck, thanks so much man.
    That would make sense about the CGA/Hercules combo. I can't believe I didn't check the memory datasheet before posting it wrong.
    Now if I could only get the schematics of the switches, I would be all set to use the card with either my monochrome or CGA monitor.
    You are a wonderful help.

    Leave a comment:

  • Chuck(G)
    Take a look at the memory datasheet. the TMS4416 is a 16Kx4 bit (half-byte) chip. So if you have 8 of them, you have 64K. The EV-640 was a sort of "combo" card--it could do both Hercules monochrome as well as CGA graphics.

    Leave a comment:

  • pianoman72
    Hi, and thanks for your input.
    I have a year printed on the card, which is 1985. What strikes me as being EGA, is that it looks like the card has at least 128k of memory on the card, judging by the number and inscription on the chips (I count 8 memory chips, named TMS4416-15NL). The card is fully populated, as well.

    Searching similar model numbers on the web, I found the EV-659 model to be EGA, but also fully supporting the earlier modes, such as CGA/Hercules/MDA.

    My system does seem to POST, however all I get on the video is just a blurry/wavy image, with no beep error codes. I did not wait long enough to see if the floppy or hard drives would be accessed, for fear of damage to the IBM 5154 monitor.

    Leave a comment:

  • RWallmow
    I know a lot of video/parallel combo cards were MDA/HERCULES not EGA, I am not finding anything on that model card so I cant be sure. Is there a date on that card anywhere? If its early to mid 80's I would bet on it being MDA/HERC, if its mid to late 80's its most likely EGA.

    Also does your system POST and start reading HD/Floppy when the card is installed and you just have no picture, or does it beep error codes at you and not boot at all?

    Leave a comment:

  • pianoman72
    started a topic Everex EV-640 8-bit video card

    Everex EV-640 8-bit video card

    Hello all,

    I have a new 8-bit video card, called Everex EV-640, which came with a recent purchase. While I believe the connectors to be EGA and parallel, I cannot find any documentation online about the jumper switches, and how to set them for my IBM XT computer, using the IBM 5154 display.

    I have attached 3 pictures, using my average digital camera. Sorry for the blurriness.

    I tried it as it is in my IBM XT (using correct motherboard switches), but could not get a picture on the screen. Of course, my computer and screen work with a different EGA card, but I am hoping to use this Everex card, because of the added parallel port.

    Any info. on this card would be highly appreciated.
    Thanks in advance.
    Attached Files