One thought I had was an intensity bit. Essentially, there’s some sort of attenuator circuit; when the intensity bit is not set, the video signal is reduced for that set of seven pixels. For our two-page graphics mode setup, this would allow us to attenuate the colors separately, expanding our four-color palette, within 7x1 blocks. And remember, each page could be attenuated separately.
gogo() does the opposite: it restores those saved values and jumps right into the goroutine. Together, mcall() and gogo() are the mechanism behind every voluntary goroutine switch. For async preemption (where the goroutine is interrupted mid-execution by a signal), the full register set has to be saved — but that’s the exception, not the common path.
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Интересовавшийся Министерством обороны россиянин попал под следствие14:54
in [args] starts and optionally ends a block containing