What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
; IRETd_V86 — set up V86 segment state
，更多细节参见谷歌浏览器【最新下载地址】
Фото: Bernadett Szabo / Reuters
Раскрыты подробности о договорных матчах в российском футболе18:01