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.
"officialMarketplaceAutoInstallAttempted": true,
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Shropshire Council said an April launch would place it under "significant financial risk".
这种方法实现简单，但需要在每个 iOS 调用点手动处理类型转换。