Accumulator and index register can be accessed by the programmer.
程序员可以对累加
和变址寄存

存取。
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体 I A method of interfacing with hardware that involves repeatedly reading a status register until the device has reached the awaited state. Device drivers are either polling or interrupt-driven, with the latter being more generally preferred.
一
硬件交互方法,不断读状态寄存器,直到设备进入等待状态。设备驱动程序不是轮询的就是中断驱动的,后一


成为首选的。
Said of software that can be executed multiple times simultaneously. A reentrant function can be safely called recursively or from multiple tasks. The key to making code reentrant is to ensure mutual exclusion whenever accessing global variables or shared registers.
可同时多次运行的程序的说法。可再入的函数可以被安全地递归调用或由多任务多次调用。使代码可再入的关键在于确保在访问全局变量或共享寄存器时互斥现象发生。