Changeset 667 in t29-www for en


Ignore:
Timestamp:
Sep 21, 2014, 10:08:56 PM (5 years ago)
Author:
heribert
Message:

falschen Link in News (en) berichtigt
Blogseiten in de und en erstellt

die beiden letzten Blog-Einträge müssten noch übersetzt werden

Location:
en
Files:
4 edited

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  • en/communication/fax.php

    r594 r667  
    260260       
    261261         <div class="box left">
    262                 <img src="/shared/photos/kommunikationstechnik/telegrafenalphabet.jpg" width="414" height="391" alt="Fernschreiber" />
     262                <img src="/shared/photos/kommunikationstechnik/telegrafenalphabet.jpg" width="414" height="391" />
    263263                <p class="bildtext">
    264264                <div class="bildtext"> 
  • en/computer/ibm1130.php

    r663 r667  
    9191the printer control. <br><br>
    9292
    93 <b>7.6.2014:</b> The card 7432 we are looking for is only used in systems with a memory
    94 expansion. These mainframes are much rarer than the smaller IBM 1130 systems
    95 without the additional left enclosure. Therefore both, the card missing in
    96 out machine as well as its schematics have apparently not been preserved.
    97 Accordingly, we reverse-engineered the circuit diagram based on measurements
    98 on an existing card and rebuilt the card. Now the core memory of our IBM 1130
    99 is working like a charm which is a significant milestone.<br><br>
    100 
    101 <b>16.6.2014:</b> Giant leaps: After an intensive cleaning effort with adjustments following,
    102 the card reader IBM 1442 is now fully operational and we could successfully
    103 run the seven so-called "One-Card-Diagnostic" programs. This demonstrated
    104 that the CPU is at least basically operating (since these tests are quite
    105 simple in nature they can not detect subtle faults).<br>
    106 The next test involved the console printer: A working console printer is necessary to communicate
    107 with the machine - unfortunately, this test showed that the printer is still
    108 faulty. Currently, we suspect resinified oil as the culprit. <br><br>
    109 
    110 <b>31.08.2014:</b> We would like to thank the people from the "Verein fuer ein Museum
    111 der Lochkartentechnik", cosecans.ch, who donated a set of plug in cards
    112 for the IBM 1131 processor. Without these spares our repair attempts would be
    113 next to impossible due to the SLT technology.<br>
    114  Further tests showed that memory and CPU test run flawlessly but the
    115 keyboard/printer-test still fails.<br><br>
    116 
    117 <b>07.09.2014:</b> We experienced some set-backs during our initial restoration
    118 attempts. This was not that unexpected since the machines have been sitting
    119 idle for several decades. We have at least two different problems in the
    120 machine. Without diagnostic programs, any repair attempt would be in vain. Just
    121 the keyboard/printer test shows two errors:<br>
    122 
    123 1) After running for some time, the attempt to read programs from punched cards
    124 will print out "E0004   CKSUM" on the console typewriter which denotes a
    125 checksum error; the checksum stored on the card differs from that computed by
    126 the CPU based on the data read. Possible causes for this type of error are
    127 missing/wrongly placed cards, reader errors or a CPU error. The first
    128 possibility can be ruled out, so the error is either in the reader or in the
    129 CPU.<br>
    130 
    131 2) The second error we experience is "E0001   INVLD" denoting an erroneous
    132 address in the switch register for that particular test. Unfortunately the
    133 address set on the switches is correct so another problem is still lurking in
    134 the machine.
    135 
    136 
    13793                </small>
    138                 <p><em>This section will be gradually continued.</em></p>
    139                 <p><a class="go" href="/en/devices/ibm1130-blog.php">IBM 1130 Reparation blog archives</a>
     94                <br>
     95               
     96                <p><a class="go" href="/en/devices/ibm1130-blog.php">IBM 1130 Reparation blog continuation</a>
    14097               
    14198               
  • en/devices/ibm1130-blog.php

    r664 r667  
    77?>
    88
    9 <h2>IBM 1130 Reparation Blog</h2>
     9<h2>IBM 1130 Reparation Blog, continuation</h2>
    1010
    11 <p>Here to be dragons</p>
     11<br>
     12
     13The beginning you'll find here <a href="/en/computer/ibm1130.php#blog-ibm"> <b>IBM-Blog, start</b> </a>
     14<br><br>
     15
     16<b>7.6.2014:</b> The card 7432 we are looking for is only used in systems with a memory
     17expansion. These mainframes are much rarer than the smaller IBM 1130 systems
     18without the additional left enclosure. Therefore both, the card missing in
     19out machine as well as its schematics have apparently not been preserved.
     20Accordingly, we reverse-engineered the circuit diagram based on measurements
     21on an existing card and rebuilt the card. Now the core memory of our IBM 1130
     22is working like a charm which is a significant milestone.<br><br>
     23
     24<div class="desc-left">
     25                <a class="popup" href="/shared/photos/rechnertechnik/1130-reparatur.jpg">
     26        <img src="/shared/photos/rechnertechnik/1130-reparatur.jpg" alt="1130 während der Reparatur" width="391" height="269" /></a>
     27        <p class="small">So it looks while repairing. Invisible: Measuring Park and many simultaneously opened Manuals.<br>
     28Enlarge: click on picture!</p></div>
     29
     30<b>16.6.2014:</b> Giant leaps: After an intensive cleaning effort with adjustments following,
     31the card reader IBM 1442 is now fully operational and we could successfully
     32run the seven so-called "One-Card-Diagnostic" programs. This demonstrated
     33that the CPU is at least basically operating (since these tests are quite
     34simple in nature they can not detect subtle faults).<br>
     35The next test involved the console printer: A working console printer is necessary to communicate
     36with the machine - unfortunately, this test showed that the printer is still
     37faulty. Currently, we suspect resinified oil as the culprit. <br><br>
     38
     39<b>31.08.2014:</b> We would like to thank the people from the "Verein fuer ein Museum
     40der Lochkartentechnik", cosecans.ch, who donated a set of plug in cards
     41for the IBM 1131 processor. Without these spares our repair attempts would be
     42next to impossible due to the SLT technology.<br>
     43 Further tests showed that memory and CPU test run flawlessly but the
     44keyboard/printer-test still fails.<br><br>
     45
     46<b>07.09.2014:</b> We experienced some set-backs during our initial restoration
     47attempts. This was not that unexpected since the machines have been sitting
     48idle for several decades. We have at least two different problems in the
     49machine. Without diagnostic programs, any repair attempt would be in vain. Just
     50the keyboard/printer test shows an error:<br>
     51
     52"E0001   INVLD" denoting an erroneous
     53address in the switch register for that particular test. Unfortunately the
     54address set on the switches is correct so another problem is still lurking in
     55the machine.<br><br>
     56
     57
     58<p><b><em>This section will be gradually continued.</em></b></p>
     59
  • en/news.php

    r649 r667  
    1010  text: "<em>A historic 5-bit character decoder</em> from the university. Here it is used as a decryption engine in our experimental workshop."
    1111  bild: /shared/photos/kommunikationstechnik/telegrafenalphabet.jpg
    12   link: /de/kommunikationstechnik/faxtechnik.php#decoder
     12  link: /en/communication/fax.php#decoder
    1313
    1414- datum: June 2014
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