Changeset 496 in t29-www

Jan 12, 2014, 11:03:36 PM (9 years ago)

Rep.-Blog ins Englische übersetzt, engl. Suche aktualisiert

2 edited


  • en/computer/ibm1130.php

    r487 r496  
    1919There is much to report about, but in first place the optical and electronical restoration of the Computer have to be realized.<br> This section will be continued within a short time.</p><br>
    21 <!-- <p><small>This system was transferred by FITG (Frankfurt) for what we are deeply grateful.</small></p>
    22 -->
     21<h3 id="blog-ibm">Restauration-Blog</h3>
     22                <p class="small">
     23                As we did for the restoration of the UNIVAC 9200, we will again have a repair
     24blog for the IBM 1130. The main problem here is due to the rather special
     25technology employed by IBM, the so-called SLT (Solid Logic Technology). The
     26circuit elements are small ceramic tiles with discrete transistors, resistors
     27etc. which thus form an equivalent to an integrated circuit. The problem is
     28that these elements and boards are no longer available. So the very advanced
     29technology of IBM makes it hard to maintain these old machines today.<br>
     30In the same time other companies like BULL still used discrete transistors mounted
     31on large circuit boards. Worlds colliding... Such a restoration process is
     32extremely time consuming and cumbersome and maybe we wouldn't start it at all
     33if we knew in advance how many bugs there are to resolve.</p><br>
     36                <div class="desc-left">
     37                <a class="popup" href="/shared/photos/rechnertechnik/ibm-1130-board.jpg">
     38        <img src="/shared/photos/rechnertechnik/ibm-1130-board.jpg" alt="Modul der IBM1130" width="195" height="247" /></a>
     39        <p class="small">Typical <b> SLT-module </b>. The circuit diagram IBM was printed on speed printers. Disadvantage: heavy to read because all logic elements look identical. <br>Enlarge: click on picture!</p></div>
     41                <p class="small">
     43                <b>Dec.2013:</b>  Cleaning the machine and removing disintegrated foam rubber mats.<br><br>
     45                <b>30.12.2013:</b> Due to curiosity we already invested much time. After installing
     4616 kB memory the first power on was attempted: No magic smoke escaping - a
     47big success! Nevertheless, the console typewriter banged its type head
     48repeatedly at the left margin so we switched off quickly.<br><br>
     50                <b>2.1.2014:</b> Removal of the console typewriter for easier maintenance. After
     51three hours the bug was found: Four small bars, moved by springs, were
     52immovable due to old oil which had solidified. Correction was simple due to
     53some W40.<br><br>
     55                <b>4.1.2014:</b> Since the console typewriter is now working flawless, we
     56concentrated on writing data to the memory system. At first sight, the memory
     57is working a "bit".<br><br>
     59                <b>6.1.2014:</b> After we have learned how to deposit data to the memory and read it
     60back, it became clear that there are at least two problems: 1: Depositing
     61values in consecutive memory addresses fails, and 2: two out of 15 bits are
     62missing at all, causing parity errors.<br>
     63                <br><br>
     65                <b>8.1.2014:</b> The second error was found rather quickly: One "head connector" was
     66missing from the second memory module. We fail to understand how such an item
     67can get lost. The first error is harder to find.<br><br>
     69                <b>11.1.2014:</b> The first error turns out to be a show-stopper: The address
     70generation is working fine but the driver for the address lines 11, 12, 13,
     71and 14 is missing since there is no board 7342! Somehow this has been removed
     72from the machine! That is the worst case for every restoration project! A
     73closer inspection revealed, that a second board, 4628, is also missing from
     74the printer control. We are now looking desperately for replacement boards or
     75at least the schematics. If you can help, please let us know!  (Pictures
     76of the missing boards can be found in the "Wanted" area of this web site.)
     78                </small>
     79                <p>Continuation follows</p>
  • en/wanted.php

    r472 r496  
    11 <p><b>We soon get a complete IBM 1130 ("electronic computing system"), built circa 1965/66.
    12 Therefore we are looking for anything that can be raise for this computer: Manuals, programs and boards especially with the small monolithic ICs.</b><br>
    13 Old IBM engineers: Please browse through your basement, whether you still can find something about IBM 1130 System. Thank you very much!</p>
    14 <br><hr><br>
     11 <div class="box left clear-after">
     12        <img src="/shared/photos/rechnertechnik/ibm-4628-7342.jpg" alt="Gesuchte Boards" width="505" height="261" class="nomargin-bottom" />
     13        <p class="bildtext">
     14   We are urgently looking for the Boards "4628" (16 bit register) and "7342" (address driver) from IBM for our <b> IBM 1130 </b> system. It would be helpful to have the schematics for these boards. If you can help, please let us know! <br>
     15Also other boards with SLT technology, we could well use. </p> </div>
     16<br> <hr> <br>
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