Changeset 203 in t29-www


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Timestamp:
Oct 17, 2010, 1:16:34 AM (8 years ago)
Author:
sven
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Merged 25 improvements of a (presumably) Canadian contributor (t29 language improvement system), considering the univac9200.shtm. Thank you!

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1 edited

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  • en/computer/univac9200.shtm

    r191 r203  
    2020    <h2><!--#echo var="title" --></h2>
    2121       
    22         <p>The Univac 9200 (Univac 9300) is a punch card computing data center from 1966. It is not
    23            common that such old devices are completely preserverd, even all
    24            manuals are available. This system was stored over four years in the museum
    25            archives until we moved it with a freight company just into the museum, next
     22        <p>The Univac 9200 (Univac 9300) is a punch card computing data center from 1966. It is
     23           uncommon that such old devices are completely preserved, even all the
     24           manuals are available. This system was stored for over four years in the museum
     25           archives until we moved it with a freight company into the museum, next
    2626           to the <a href="univac9400.shtm">UNIVAC 9400</a>.</p>
    2727           
    28         <p>After moving the devices with a trucking company to the museum buidling,
    29            the restauration started with cleaning all the devices, removing the typical
    30            old rotten noise-absorbing mats at the very first. They have been replaced by
     28        <p>After moving the devices with a trucking company to the museum building,
     29           the restoration started with cleaning all the devices, initially removing the typical
     30           old, rotten noise-absorbing mats at the very first. They have been replaced by
    3131           brand new cellular rubber.</p>
    3232
    33     <p>We expect most of the problems with all the mechanical parts that take most
    34            of the place in the cabins. We already removed transportation lockings
    35            <!-- LOL - wirkt inhaltich echt behindert, sowas geht sonst ja schnell ;) -->
    36            and replaced some bearings, drive rollers and belts. The card puncher features
    37            15 timing belts, for instance.
    38            The card reader (500 cards/minute) works again and the puncher mechanics is
    39            now executable, too. The processor link of these auxillary devices is another
     33    <p>We expect most of the problems to be with the mechanical parts in the cabinets.
     34       Already we have removed the transportation locks and replaced some bearings,
     35           drive rollers and belts. The card puncher features 15 timing belts, for instance.
     36           The card reader (500 cards/minute) works again and the puncher mechanics are
     37           now executable, too. The processor link to these auxillary devices is another
    4038           issue and will be checked in the near future.</p>
    4139
     
    4341                        <img src="/shared/photos/rechnertechnik/univac9300.jpg" alt="UNIVAC 9300" width="700" height="375" />
    4442                        <p class="bildtext">
    45                                 <b>UNIVAC 9300</b> electronic data processing system, with the entities (left
    46                                 to right): bar printer, cpu, "electronic cabinett" (power supply and plated wire
     43                                <b>UNIVAC 9300</b> electronic data processing system, with its components (left
     44                                to right): bar printer, cpu, "electronic cabinet" (power supply and plated wire
    4745                                memory), card reader, card puncher.
    4846                        </p>
    4947                </div>
    5048               
    51         <p>For optical reasons, we also repainted the cases.</p>
    52         <p>Afterwards, we will address the bar printer. In contrast to the already
     49        <p>For aesthetic reasons, we also repainted the cabinets.</p>
     50        <p>We will address the bar printer at a later time. In contrast to the already
    5351       mentioned devices, the printer cannot be controlled manually, so we will
    54            start up the processor, too. This will be a buggy job, too.
     52           have to start up the processor, too. This will be a buggy job.
    5553           But all the work is not for nothing, <!-- sic! gute uebersetzung -->
    5654           since the system is really unique, featuring punch card assembler programming.</p>
    5755
    5856        <p>We will continously update this page about the progress of the reparation
    59            untill the device is fully functional again.</p>
     57           until the device is fully functional again.</p>
    6058
    6159        <div class="box center auto-bildbreite">
     
    6664
    6765        <h3 id="blog">Restoration Blog</h3>     
    68         <p><b>17.01.2010:</b> There were some mice in the power supply and printer, they
    69            bit thorught some small cables.
    70         <p><b>16.02.2010:</b> After locating two defect resistances the power supply is
    71            running again. Thus we can use punch card devices from the CPU by now. Actually
     66        <p><b>17.01.2010:</b> There were some mice in the power supply and printer; they
     67           bit thorugh some small cables.
     68        <p><b>16.02.2010:</b> After locating two defective resistors the power supply is
     69           running again. Now we can use punch card devices from the CPU. Actually
    7270           we cannot read nor punch data.
    7371        <br>Now there is another malfunctioning device: The <a href="storage-media.shtm#plated-wire-storage">
    74            plated wire storage</a> does not work. We try to get it working at least a bit,
    75            replacing it with a new selfmade solid state memory. As you can read on our
     72           plated wire storage</a> does not work. We are trying to get it working at least partially,
     73           replacing it with a new self-made solid state memory. As you can read on our
    7674           <a href="/en/devices/plated-wire-storage.shtm">detailed description of the
    7775           plated wire storage</a>, this type of memory has always been very error-prone.
     
    7977                <img src="/shared/photos/rechnertechnik/9300pannel.jpg" alt="UNIVAC 9300 Front palen" width="400" height="296" />
    8078                <p class="bildtext" style="width:400px;"><b>UNIVAC 9300 front panel:</b> 160
    81                 states of processor and periphery can be indicated with light bulbes and
     79                states of processor and periphery can be indicated with light bulbs and
    8280                selected via switches.</p>
    8381        </div>
     
    8684                locate this error.
    8785        <p><b>02.05.2010:</b> A broken thyristor (hammer driver) raised the
    88             "printer error" message. Data integrity was the most important part at those
    89                 time: If only one of the 140 printer columns is not working correctly, the whole
    90                 printer goes offline to avoid wrong output.
    91         <p><b>10.05.2010:</b> We could get the plated wire storage online. We
     86            "printer error" message. Data integrity was the most important consideration at the
     87                time. If only one of the 140 printer columns is not working correctly, the whole
     88                printer goes offline to avoid any wrong output.
     89        <p><b>10.05.2010:</b> We managed to get the plated wire storage online. We
    9290            can even start some small test programs via the input switches, but there are
    93                 bugs while running. This is perhaps the unique device that still uses the old
    94                 plated wire storage. Anyway we are planing a replacement.
    95         <p><b>12.06.2010:</b> After callibrating the optical card reader, we could read in
     91                bugs while running. This is perhaps the only device that still uses the old
     92                plated wire storage. Anyway, we are planing a replacement.
     93        <p><b>12.06.2010:</b> After calibrating the optical card reader, we could read in
    9694           and execute small programs in the data memory. We will report about the high
    97            security level at the card reading process later. Surprisingly the plated wire
     95           security level of the card reading process later. Surprisingly the plated wire
    9896           storage still works.</p>
    99         <p><b>16.06.2010:</b> The card puncher doesn't work any more. 30 years inactivity
     97        <p><b>16.06.2010:</b> The card puncher doesn't work any more. 30 years of inactivity
    10098           are a long time for computers, too.
    10199           <br>On the other side, we could execute a printer loop program. The huge printer
     
    103101        <p><b>25.06.2010:</b> The fuse is triggerd by a broken centrifugal switch from the
    104102           printer engine start-up windings. Therefore the winding was always on and
    105            dissipated constantly current. Now the engine is running, but print commands
     103           constantly dissipated current. Now the engine is running, but print commands
    106104           are not yet executed.
    107            <br>We also could find a bug in the memory. Now all 8kB seem to run completely
     105           <br>We also found a bug in the memory. Now all 8kB seem to run completely
    108106           error-free.</p>
    109         <p><b>30.06.2010:</b> We could locate another bug in the printer logic (faulty
    110            transistor). The first time after 30 years, the bar printer works and is capable of
     107        <p><b>30.06.2010:</b> We located another bug in the printer logic (faulty
     108           transistor). For the first time in 30 years, the bar printer works and is capable of
    111109           printing files from various punch cards. The type face looks good.
    112            <br>Now we turn towards the damaged printer.</p>
     110           <br>Now we turn to the damaged printer.</p>
    113111        <p><b>05.08.2010:</b> After replacing a broken transistor and injecting some oil,
    114            the puncher is up and running! Now we are able of duplicating punch cards.
     112           the puncher is up and running! Now we are able to dublicate punch cards.
    115113           Unfortunately we had to disable the error checking functions since the device
    116            detected a non-existing error at punching. Locating this error is the next
     114           detected a non-existing error when punching. Locating this error is the next
    117115           problem.</p>
    118         <p><b>26.08.2010:</b> Locating this bug in the device's internal error checking
     116        <p><b>26.08.2010:</b> Locating the bug in the device's internal error checking
    119117           of punched data was hard work. The computer compares the data which should be
    120118           punched with the position of the hammers in the punch station in a very
     
    122120           furthermore a transistor which amplifies the particular induced voltage was
    123121           out of order and there was a cold solder joint. Finally the complete sensing
    124            station had to be recallibrated to deliver all information simultaneously to
     122           station had to be recalibrated to deliver all information simultaneously to
    125123           the comparing element. The adjustment has only a margin of 5 microseconds.
    126            After this reparation, all duplicated punch cards are checked, too. If there
     124           After this repair, all duplicated punch cards are checked too. If there
    127125           is a wrong punch hole, the computer stops immediately (an event that occurs
    128            extremely rare as from now).</p>
     126           extremely rarely now).</p>
    129127       
    130128        <p><i>This blog will be irregulary continued.</i></p>
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