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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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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.

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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
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Wanted: PDP-8/S, PDP-8/I, or PDP-8/L

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    Wanted: PDP-8/S, PDP-8/I, or PDP-8/L

    Hello everyone, Iím interested in purchasing a complete PDP-8/S, 8/I or 8/L. I realize that these can be challenging to find, so any possible leads would be greatly appreciated!

    #2
    There's a big difference in performance between the 8S and 8I/8L. Are you more interested in the hardware aspects of those systems or do you want to use specific software? The 8I would probably be the most desirable since it can work with the widest range of hardware options. The 8L would be the least costly to ship since it's the smallest of the 3.
    WTB: DEC PDP8-E rack header panels, AD8E, A008, A231, A232
    TA60, TM8-E, PC04, PRS01, BC80H, BC80J cable (RL8A cable)

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      #3
      There's a big difference in performance between the 8S and 8I/8L. Are you more interested in the hardware aspects of those systems or do you want to use specific software? The 8I would probably be the most desirable since it can work with the widest range of hardware options. The 8L would be the least costly to ship since it's the smallest of the 3.
      I'd love to have an 8/S mainly because of the fact that it is transistor based (like the original straight- and is just the more "interesting" of the two in my eyes, but I am also aware of the limitations and software incompatibilities. For that reason, I'd be equally interested in an 8L or 8I. My goal with these machines wouldn't be to do any extraneous work, but more so just to fiddle with old versions of FORTRAN with a teletype. I've been fairly busy with school lately and haven't had the time to get as involved with the community as I'd like, but I am very interested in learning more about these old machines.
      Last edited by Tarkus01; September 1, 2021, 12:20 PM.

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        #4
        Originally posted by Tarkus01 View Post
        I've been fairly busy with school lately
        I'd suggest researching the prices on these machines first.
        You aren't going to find any 1960's PDP-8s for less than several thousand dollars.

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          #5
          The TTY alone would set you back a few bucks.

          If you want the experience, you might investigate emulators. There are many software, as well as FPGA and IM6100 emulators lurking about.
          Reach me: vcfblackhole _at_ protonmail dot com.

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            #6
            With regards to the price, I’m definitely aware that these machines are not cheap. That said, the prices do seem to vary. I recall a rough (but complete) 8/L that sold on eBay one or two years back for $2400 as well as another that went for $1600 some years prior. I was offered a project 8/I for $2500 not too long ago, though I was never told the condition of the machine.

            As for the 8/S, those seem to seldom come up for sale. I know of a few lone desktop units that’ve gone for around $3000 as well as one that went for $6000 with the ASR 33 and PT08 interface. Another collector was willing to sell me one, but the memory cores were trashed. Attempting to repair them would be beyond the scope of my expertise. What I’d be willing to pay for an 8/S would depend on its condition.

            Emulators like FPGA and the PDPi-8 are definitely more convenient (and certainly less costly), but I‘m more of a collector/purist and want the real deal. At the moment I’d like just a baseline machine that I could get up and running again before expanding it with any additional I/O (teletype, paper tape reader, etc.)
            Last edited by Tarkus01; September 3, 2021, 11:50 PM.

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