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Thread: HP 1000 A class A900

  1. #1
    Join Date
    May 2011
    Location
    Liverpool, England
    Posts
    327

    Default HP 1000 A class A900

    Hi, I've been following and contributing to the below thread on here under "other", as the HP 1000 A900 is a mini computer I though I would move the discussion over to here.

    http://www.vcfed.org/forum/showthrea...-with-7937-HDD

    I acquired an A900 a few months ago after working on the A400 and the 1000 L class many years ago. It was a bit of a learning curve for me and I'm enjoying the challenge. Apart from the original system I've since purchased a few more boards and sold a couple that I would never use. My A900 is still not running as I'm in need of a cable to connect the mux PCB to the breakout board or an async cable to connect my async card to a terminal so that I can get to VCP and then the next challenge with be installing RTE-A on either a HP-IB disk or on a PC with a HP-IB card and the disk emulation that is available.

    Is there anyone out there in the UK or further afield with a working HP 1000? Be interesting to know other peoples thoughts.

  2. #2
    Join Date
    May 2011
    Location
    Liverpool, England
    Posts
    327

    Default

    a.jpgI have the mux cable and breakout board, I can now get a VCP prompt but my A900 shows as having 0MB memory. I had a spare memory controller an 3/4MB card, I get the same error with these installed. So either one of the other cards is faulty or both my memory cards and controllers are faulty. It also fails the memory test.


    PTEST ERR 340 200 points to a memory error in first 32k, this is the same with a 3/4 MB board or an 8MB board installed. I've also tried two memory controllers.

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