A PDP 11 By Any Different Title: Heathkit H11 Teardown And Restore

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[Lee Adamson] is not any stranger to traditional computer systems. He just lately picked up a Heathkit H11A which, as you may keep in mind, is definitely a PDP-11 from DEC. Nicely, technically, it’s an LSI-11 however nonetheless. Like a correct LSI-11, the pc makes use of the DEC QBus. Not like loads of computer systems of its day, the H11 didn’t have loads of switches and lights, nevertheless it did have an incredible software program library for its day.

[Lee] takes us by way of a tour of all of the completely different playing cards contained in the factor. It’s superb if you consider at the moment’s laptop computer motherboards that pack far more right into a a lot smaller house. He additionally needed to repair the ability provide.

We’re trying ahead to seeing extra movies on this pc. We miss the times that your pc broke down into a number of boards plugged right into a backplane. Although the pc is a Heathkit, the CPU board got here from DEC assembled. Nevertheless, Heathkit had its personal boards that you simply did construct together with issues like energy provides.

The ability provide wanted some care, as you may anticipate. A diode wasn’t connected correctly nevertheless it wasn’t clear if it had been broken in transit or if it had by no means been put in accurately. Changing it put the ability provide proper and now he’s able to see if the factor will begin up.

There are many methods to emulate a PDP-11 on issues like Arduinos. If you wish to see what meeting language appeared like on this machine, there’s a tutorial.


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