Reading about HP minicomputers and the MPE operating system because @eschaton is a bad influence.

@lopta Isn’t it weird, though?! Directorial hierarchy is backwards! It had a RISC port with Mixed Mode before the PowerPC existed! It’s never run on a mainstream CPU!

@lopta Also, I can confirm that the MPE IV Pocket Guide that one can acquire on eBay is adorable. The book is about 5×7 inches, the pages thinner, the tabs sturdy, the information comprehensive.


@lopta For example, it has a great set of reference pages on the 16-bit HP 3000 instruction set, as of its latest 1981 iteration, in a way that’d make it straightforward to emulate…

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