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UNIBUS SCSI Controller wanted

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    UNIBUS SCSI Controller wanted

    Hi,

    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.

    Thanks,
    Howard
    =====================
    Howard M. Harte
    Harte Technologies, LLC.
    www.hartetec.com

    #2
    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.

    -ethan

    Comment


      #3
      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.
      www.hartetec.com

      Comment


        #4
        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.

        -ethan

        Comment


          #5
          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.

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

          Please visit the Vintage-Computer Wiki. Contributers welcome.

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