Forum etiquette

Our mission ...

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.

Remain civil and respectful

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.

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.)
  • If you are responding to a thread, stay on topic - the original poster was trying to achieve something. You can always start a new thread instead of potentially "hijacking" an existing thread.

Contribute something meaningful

To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
  • This is not a chat room. If you are taking less than 30 seconds to make a post then you are probably doing something wrong. A post should be on topic, clear, and contribute something meaningful to the discussion. If people read your posts and feel that their time as been wasted, they will stop reading your posts. Worse yet, they will stop visiting and we'll lose their experience and contributions.
  • Do not bump threads.
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  • Use the Private Message system for posts that are targeted at a specific person.

"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.

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.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
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UNIBUS SCSI Controller wanted

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    UNIBUS SCSI Controller wanted


    I'm looking for a UNIBUS SCSI Controller for my PDP-11/44. Something from CMD or Emulex that can do disks (at least) and tapes (would be nice.)

    I'm also looking for M8743 1MB RAM cards for the 11/44.

    Howard M. Harte
    Harte Technologies, LLC.

    Me too!

    Yep... I'd love a Unibus SCSI adapter, too. Don't see them at hobbyist prices, though.

    I've always wanted to get 2.9BSD really running on my 11/24; three RL02s just isn't enough. Now that I have an 11/44, the same goes.

    I'm woefully deficient in terms of Unibus hard disk controllers - several RL11s, an RK11C, an RK11D, and a UDA50. That's about it. Many of my -11s were bench-test platforms and had a little RAM (32Kw), a DL-11 and nothing else. RT-11 is no problem (off of floppy, if nothing else), and an RL02 is fine for RSX-11M or RSTS, but 10Mb isn't enough room for any real playing around.



      UNIBUS Disk Controllers

      Hi Ethan,

      I have an Emulex controller on my 11/44 now that emulates two RM03's per 14" SDI drive. I have two Fujitsu 160MB drives, which works out to four emulated RM03's at 80MB each. The drives work fine, but take up about half of a 6 foot rack, so SCSI would be really nice. Then I could put a bunch of different OSs on the machine and run it more frequently without generating so much heat and drawing so much current from the power company.

      I do have 2.11BSD running on the machine, but with 2MB of RAM, I can't rebuild the kernel without problems. At least I think it's due to lack of RAM.
      Howard M. Harte
      Harte Technologies, LLC.


        11/44 and 2BSD and disks

        Up until I got the 11/70s (which I have not yet been able to provide power to) and the 11/44, I was woefully lacking in Split I&D machines, thus I was limited to 2.9BSD. I'd run 2.9BSD on the 11/24 with 4MB (KT24), but with a lack of disk space, I couldn't fit the sources, thus no kernel rebuilds for me, either.

        I don't have a Unibus SMD controller, but I do have three SI-9900s with Massbus interfaces (for the 11/70s and an 11/750). Your 160MB Fuji sounds familiar - like the boot drive for the 11/750. The rest of my SMD disks are Fuji Eagles which, while nice and large, aren't a standard DEC size, and require driver patching to work.

        The expense of Qbus and Unibus SCSI are one of the things that keeps me playing with old Sun equipment - even a Sun 3/60 or a SPARCstation 1 comes with SCSI (and uses SIMMs). Maxing one of those out is just a trip to the $1 bins at a Hamfest.



          real computing

          Hey, some real computing fr a change...
          (I used to have a couple of 3/60s but have donated them to a computer museum. The hard drive was nfg, and I could never get them up and running.

          Teach your children how to think, not what, and hold 'em close, not tight.

          Please visit the Vintage-Computer Wiki. Contributers welcome.