Index: en/computer/ibm1130.php
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Accordingly, we reverse-engineered the circuit diagram based on measurements
on an existing card and rebuilt the card. Now the core memory of our IBM 1130
-is working like a charm which is a significant milestone.
+is working like a charm which is a significant milestone.
+
+16.6.2014: Giant leaps: After an intensive cleaning effort with adjustments following,
+the card reader IBM 1442 is now fully operational and we could successfully
+run the seven so-called "One-Card-Diagnostic" programs. This demonstrated
+that the CPU is at least basically operating (since these tests are quite
+simple in nature they can not detect subtle faults).
+The next test involved the console printer: A working console printer is necessary to communicate
+with the machine - unfortunately, this test showed that the printer is still
+faulty. Currently, we suspect resinified oil as the culprit. Stay tuned...