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>"Mainframe designers had this problem under control by 1970. Mainframes had, and have, "channels". A channel is part of the processor architecture."

What are some examples of these processors?

I would be interested in reading more about these mainframe processors architecture. Might you or anyone else have some links?

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It is always surprising for me to see how mainframes have always been one step further. I don't have any experience with them but I've learned that there have been for example live VM migrations between hosts for a long time already. And that there was a cool system called IBM AS/400 introduced in 1988 with integrated database and "everything is an object" design and peripherals with processors and which is still being used for some critical applications today. Our x86 clouds with Kubernetes may sometimes feel like a bunch of cheap toys in a way. :P

You could start with http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/370/pri..., see page 185

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