The main rule for data access is max(CPL, RPL) ≤ DPL. For code transfers, the rules get considerably more complex -- conforming segments, call gates, and interrupt gates each have different privilege and state validation logic. If all these checks were done in microcode, each segment load would need a cascade of conditional branches: is it a code or data segment? Is the segment present? Is it conforming? Is the RPL valid? Is the DPL valid? This would greatly bloat the microcode ROM and add cycles to every protected-mode operation.
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One of the more fancy things you might do with Ansi escape codes is to implement a command-line. Bash, Python, Ruby, all have their own in-built command line that lets you type out a command and edit its text before submitting it for execution. While it may seem special, in reality this command line is just another program that interacts with the terminal via Ansi escape codes! Since we know how to use Ansi escape codes, we can do it too and write our own command line.
В частности, эксперт напомнил о произошедшей стрельбе в американском городе Остин, штат Техас, где у преступника были обнаружены религиозная литература и символика Ирана. По его словам, Тегеран не занимается напрямую практикой терактов, однако риторика руководства может толкнуть отдельно взятых людей к экстремизму.
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