一种控制块，用于分时驱动程序与分时接口程序之间的通信。

A program that handles all communication between the control program and the time-sharing driver.

youdao

一种控制块，用于分时驱动程序与分时接口程序之间的通信。

A program that handles all communication between the control program and the time-sharing driver.

youdao