Rescue 1130: 2014 Pickup of an IBM 1130 System and More rescue1130.blogspot.com

Retrigger of 1130MRAM likely due to slight wobble on trigger signal

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Side project - MV864A meter restoration - converting manual calibration/test instructions to the version I own

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Continued testing 1130MRAM board - retrigger redux

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Continued testing 1130 MRAM board - working on the retriggering

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Continued testing 1130 MRAM board - dealing with the signal bounce and retriggering

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Side project - MV864A meter restoration - almost complete schematic produced

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Continuing testing of the 1130 MRAM board

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Side project - MV864a meter restoration - simulations and look at the non-board wiring

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IBM 1130 MRAM memory board - root cause of the unwanted stream of pulses from the board being corrected

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IBM 1130 MRAM memory replacement - investigating Parity Check and random data occurrences

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IBM 1130 MRAM memory replacement - continuity test, then testing on the IBM 1130

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Side project - MV864A meter restoration - blocking out entire schematic

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Side project - MV864A meter restoration - simulating the DC Modulator Driver that produces 94Hz chopper signal

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Construction of new 1130 MRAM memory board completed

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PCBs and parts are on hand - beginning construction of new 1130MRAM board

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Side project - MV864A restoration - substantial progress in reverse engineering

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Side project - MV864A restoration - reverse engineering power supply section

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Side project - MV864A restoration - reverse engineering challenge

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Testing the 1130 MRAM core memory replacement on the IBM 1130 system - part 4

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Testing the 1130 MRAM core memory replacement on the IBM 1130 system - part 3

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