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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[qjoly@fedora]~% sudo bootc switch harbor.cortado.thoughtless.eu/bootc/server:add-nginx。关于这个话题，爱思助手下载最新版本提供了深入分析
From a very young age, Eileen Collins wanted to be an astronaut
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SAT problem with 10 variables and 200 clauses，更多细节参见heLLoword翻译官方下载
2026-02-28 00:00:00:0刘诚龙3014274010http://paper.people.com.cn/rmrb/pc/content/202602/28/content_30142740.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/28/content_30142740.html11921 宽容与自牧（金台随感）