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Thread: desktop LSI-11

  1. #1
    Join Date
    Dec 2010
    Location
    Colorado Springs
    Posts
    156

    Default desktop LSI-11

    My desktop LSI-11 setup.
    A 4-slot dual backplane with an 11/03 front panel, plus MXV11 and a W9512 wire-wrap module giving some parallel I/O and a pair of D/A's.
    The fans are 12V, but running from 5V, so they are nice and quiet.
    The little MCU board hanging on the left side drives the LSI console, and is a virtual COM port on a PC via USB. It has a micro-SD card for storing PDP code images. The virtual COM port has a 'command mode' for telling the MCU what to do. The MCU also talks to the 11/03 front panel, to perform Halt or Restart, and to drive the 3rd LED (normally unpopulated) in the FP.
    Power supply is an H7842A from a Rainbow.
    In the space above the FP, I want to add a 7-segment LED display (or similar).
    The only code image so far is my hack of FigFORTH V1.3.

    Pete

    PDP.jpg

  2. #2
    Join Date
    Aug 2009
    Location
    Oslo, Norway
    Posts
    1,300
    Blog Entries
    3

    Default

    Nice! I love builds like this.
    Torfinn

  3. #3

    Default

    Impressive! Great job getting it together and getting FORTH running on it.

  4. #4

    Default

    Fun build! More pictures, please!

    Jay

  5. #5

    Default

    That's a great little system. I have an 11/23+ in a rack case which is a lot larger

  6. #6
    Join Date
    Dec 2010
    Location
    Colorado Springs
    Posts
    156

    Default

    Quote Originally Posted by RichCini View Post
    That's a great little system. I have an 11/23+ in a rack case which is a lot larger
    Thanks Rich and others! Yeah, I used to have one of those 4-foot-high cabs, with dual 9-slots and dual RX02's, but it just needed too much space. This little guy sits beside my PC, where I can access the console via Putty, and experiment with stuff.
    Within a couple weeks I'm going to start auctioning off various DEC boards and things that I don't plan to use any more, to help fund my retirement...

    Pete

  7. #7
    Join Date
    Dec 2010
    Location
    Colorado Springs
    Posts
    156

    Default

    Quote Originally Posted by Dare View Post
    Fun build! More pictures, please!

    Jay
    More pics:
    20191230_143138.jpg
    20191230_143150.jpg
    20191230_143203.jpg
    20191230_143218.jpg

    Pete

  8. #8
    Join Date
    Mar 2007
    Location
    Leicester, UK
    Posts
    213

    Default

    Hi Pete,

    That's a nice build.

    I would like to do one like that myself and I have most of the bits I need with the exception of a double height card cage. My boards are currently in a quad height which is just too big for my plans.

    Keep up the good work.


    Cheers,

    Andy.

  9. #9

    Default

    Quote Originally Posted by saipan59 View Post
    My desktop LSI-11 setup.
    A 4-slot dual backplane with an 11/03 front panel, plus MXV11 and a W9512 wire-wrap module giving some parallel I/O and a pair of D/A's.
    The fans are 12V, but running from 5V, so they are nice and quiet.
    The little MCU board hanging on the left side drives the LSI console, and is a virtual COM port on a PC via USB. It has a micro-SD card for storing PDP code images. The virtual COM port has a 'command mode' for telling the MCU what to do. The MCU also talks to the 11/03 front panel, to perform Halt or Restart, and to drive the 3rd LED (normally unpopulated) in the FP.
    Power supply is an H7842A from a Rainbow.
    In the space above the FP, I want to add a 7-segment LED display (or similar).
    The only code image so far is my hack of FigFORTH V1.3.

    Pete

    PDP.jpg
    Hi Pete,

    these tiny LSI11 systems are cute, can't see enough of them.
    Also worked on that, http://retrocmp.com/projects/lsibox , but you won the "who has the smallest" contest.
    My electronics was: H9270 backplane, PC-Powersupply, PIC microcontroller + BeagleBone, Linux desktop, UC07 SCSI with SCSI2SD to hold 4 different disk images.
    Making a nice outfit was the real challenge ... being such a techno-only nerd. Kept me busy much too long, for 6-9 months.

    happy new year!
    Joerg

  10. #10
    Join Date
    May 2011
    Location
    Liverpool, England
    Posts
    373

    Default

    There is also the original DEC BA11-VA, i have one of these with a 11/02 CPU booting from a SCSI card and SCSI2SD. Very neat little box. 20170811_091525.jpg20170811_091537.jpgba11va-box-front-40.jpg

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