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Thread: Tandy 6000 Bernoulli Disk Cartridge System

  1. #1

    Default Tandy 6000 Bernoulli Disk Cartridge System

    I recently got my 20 MB Bernoulli disk cartridge system working with a Tandy 6000 HD and recorded a video of the full backup process. It's a fascinating piece of hardware. If you haven't see one in action before I think you will enjoy the video.

    https://youtu.be/mM1IH8frd_U

  2. #2

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    Very cool! My 6000 came with an interface card for the Bernoulli drive installed, but I don't have a matching drive yet.

  3. #3
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    Does that take the type 4 controller? Mfm type or type 2?
    *FrankG*

  4. #4

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    Quote Originally Posted by Chromedome45 View Post
    Does that take the type 4 controller? Mfm type or type 2?
    Neither. It has its own special card. See it here under "Bernoulli Box Interface"

    http://fjkraan.home.xs4all.nl/comp/t...usCardZoo.html
    Last edited by pski; November 2nd, 2015 at 03:08 AM.

  5. #5
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    Crud! of course it does! Oh well.
    *FrankG*

  6. #6

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    Finding a working 20MB Bernoulli drive was the biggest challenge. Either I have bad luck or the drives are finicky. I haven't been able to find a service manual either.

  7. #7

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    I have pictures of both sides of my Bernoulli drive card on my blog, too:

    http://www.nf6x.net/2014/11/tandy-6000-card-cage/

    See "Card 4" in the picture gallery.

  8. #8

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    I forgot about your 6000 page, Mark, thanks. I remember reading that the interface on this device was an early version of SCSI. It should provide for some interesting projects for when I retire.

  9. #9
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    Maybe some creative type could come up with a true SCSI controller for the Model II line
    *FrankG*

  10. #10
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    Quote Originally Posted by Chromedome45 View Post
    Maybe some creative type could come up with a true SCSI controller for the Model II line
    The hardware is easy, and, in fact, the Bernoulli controller can in fact control a SCSI-1 disk with the right software and a bit of modification (not 100% sure about the modification part of that). Snappware sold such a thing for Xenix, but it wasn't exactly robust.

    The software is much harder, except for LS-DOS 6.3, as Misosys had their MSCSI drivers. Someone (not me, since I don't have hardware with which to test, nor do I have the time at the moment) with the LS-DOS 6 version of MSCSI could in theory adapt it to the Bernoulli hardware Most of any SCSI driver is talking the SCSI protocol, and that is exactly the same no matter what the hardware is.

    See also: http://www.verycomputer.com/80_0022339768b651c4_1.htm and https://groups.google.com/forum/#!to...dy/tSq2OdkNXA8 and https://groups.google.com/forum/#!to...dy/sCQR7gKxTX4
    Last edited by lowen; November 3rd, 2015 at 07:12 AM. Reason: Added a couple more comp.sys.tandy links.
    --
    Thus spake Tandy Xenix System III version 3.2: "Bughlt: Sckmud Shut her down Scotty, she's sucking mud again!"

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