中國老年人沉迷網絡,究竟到了什麼程度?數據給出了震撼的答案:中國超過60歲的老年人口約3億人,其中老年網民規模已達1.61億,互聯網普及率達52.0%。第三方監測機構「貴士移動」(QuestMobile)的報告顯示,銀髮人群月人均使用時長達129小時,換算下來每天超過4小時,深夜0點仍有超過30%的銀髮用戶活躍在線。
Фото: @yeva_mishalova
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Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.
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