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The 5100 had programmable microcode which could be used to implement crypto-specific opcodes1,2,3. Then there's the whole John Titor4,5 thing... 1 Such as population count 2 I'm unaware of anyone actually having done so. 3 Certain agencies are very interested in such things though. 4 Perhaps it wasn't code-breaking in the traditional sense. If you have ...


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I think the original argument (both in the John Titor hoax and in Steins;Gate) goes like this: The IBM 5100 can emulate the IBM mainframe ISA (that's true, and that's how the APL running on the IBM 5100 was implemented: They took the mainframe APL implementation, because they didn't have enough time to develop a native APL. That also makes it slow...), and ...


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