| 释义 |
privileged instruction privileged instruction[′priv·ə·lijd in′strək·shən] (computer science) A class of instructions, usually including storage protection setting, interrupt handling, timer control, input/output, and special processor status-setting instructions, that can be executed only when the computer is in a special privileged mode that is generally available to an operating or executive system, but not to user programs. privileged instructionA machine code instruction that may only be executed whenthe processor is running in supervisor mode. Privilegedinstructions include operations such as I/O and memory management. |