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    pski

    I don't recall anyone recently who has...

    I don't recall anyone recently who has successfully put one of the Model II PS back to spec. I'm sure it's possible with enough in depth troubleshooting and component replacement. As shank...

    pski Today, 05:31 AM Go to last post
    Joerg Hoppe

    Flip-Chip Extender project

    Hi,

    for my German PDP fellows I recently designed a variety of FlipChip-Extender PCBs.
    Project babble and Gerber files for single, dual, quad and hex-width boards are here:...

    Joerg Hoppe Today, 05:27 AM Go to last post
    cbscpe

    But the microcode was in standard MCP 1600...

    But the microcode was in standard MCP 1600 microcode ROMs, so you could actually read them and disassemble. would be interesting to have a look how they implemented a PDP-11 in MCP-1600...

    cbscpe Today, 05:05 AM Go to last post
    ldkraemer

    The first thing to do is start with Power "OFF". ...

    The first thing to do is start with Power "OFF". Depress and Hold DOWN the BREAK KEY. Turn on
    POWER while continuing to hold BREAK KEY DOWN. When you see cass?? release the break key and
    tap the...

    ldkraemer Today, 04:44 AM Go to last post
    Dokken

    Another beautiful morning, and a few brain cells...

    Another beautiful morning, and a few brain cells recharged for knowledge.

    The oscilloscope screenshot below is the +9 unregulated taken at J11 pin 6.

    I see f=120hz, DC voltage = 7.08.

    what...

    Dokken Today, 04:44 AM Go to last post