sinisa_cyprus's comments

sinisa_cyprus | 7 years ago | on: I/O Is Faster Than CPU – Let’s Partition Resources and Eliminate OS Abstractions [pdf]

Only mainframes had channels. Best implementation thereof is in IBM machines. It is nothing like DMA or that Intel chip or anything else. No Unix machines nor PC and not even specialised hardware, like Tangent, had anything similar.

It is something like separate FPU or MMU units, built for the total control of the peripherals, so that CPU had little or no work to do. Don't forget that device drivers run on CPU.