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haeseongtoday at 6:22 AM1 replyview on HN

The channel program concept described here, where I/O operations are offloaded to a dedicated controller with its own instruction sequence, was a structural ancestor of modern asynchronous I/O and DMA architectures. The System/360 also codified the byte as exactly eight bits, a decision so foundational that it became the silent assumption underlying every computing architecture that followed.


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tgvtoday at 8:28 AM

I don't think IBM's influence was that large. IBM was a world on its own. The rest had hardware from many manufacturers. If there's a single point in time where the byte got its definitive shape, I'd say it was Intel's 4004, or the 8008.

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