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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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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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  • Use the Private Message system for posts that are targeted at a specific person.


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.

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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DEC Micro PDP 11/83 system for sale

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    DEC Micro PDP 11/83 system for sale

    This system was last used in the late 1990s, and has been stored ever since (not recently powered on or tested).

    BA23 pedestal case, includes Micro PDP 11/83 “badge”, and front and back covers.
    DSC_0002-la.JPG DSC_0001-la.JPG

    Cards, starting with slot 1; Clearpoint QED-1 memory, appears to be 4 Mb (148 each MCM6256AP12 256k x 1 bit memory chips):
    DSC_0012-la.JPG

    KDJ11-BF CPU (M8190-AE) with LTC & serial port:
    DSC_0014-la.JPG

    DHV-11 (M3104) 8 line sync mux (no distribution panel):
    DSC_0016-la.JPG

    RQDX3 (M7555) disc controller (no photo). This is connected to a Maxtor XT-2190 (190 Mb) disk in the lower bay of the BA23. In the upper bay of the BA23 is a DEC RD53-A disk, currently not connected to the RQDX3 or power:
    IMG_2898-la.JPG

    Note: this system hasn’t been powered up in years; I cannot guarantee it is fully functional, but it did work when last powered off. As this is a reasonably heavy system, pick up in the San Francisco, California area is preferred; shipping, if possible, is at the buyer’s expense. Asking $1000 OBO.

    Other items available include a number of QBUS cards (I’m currently inventorying them all), RT-11 documentation set, VAXstation 3100 (VS42A-BC) with DEC color monitor and VMS documentation.

    I hope this system finds a good home!

    H_Gregg

    #2
    In another box, I found a TK50 tape drive (on the slide for the BA23 box) and M7546 controller card, along with a RX33 5.25 inch floppy drive. I will add these to the 11/83 system at no additional cost.

    I also have a DEC M7504 DEQNA ethernet card available (at additional cost).

    I've researched packaging and shipping, and the cost would be about $300 to ship in the US.

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