How does V86 work at the hardware level? When the VM bit (bit 17) of EFLAGS is set, the processor enters a hybrid state: it is still in protected mode with paging and privilege rings active, but most instructions execute as if the processor were in real mode. Segment addresses are computed as selector
The same issues exist on the WritableStream side. A WritableStream has a highWaterMark and desiredSize. There is a writer.ready promise that producers of data are supposed to pay attention but often don't.
，这一点在heLLoword翻译官方下载中也有详细论述
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