| 术语 | two-level microprogram control |
| 释义 | two-level microprogram control 二级微程序控制；［二阶微程式控制］ In some microprogram controlled computer, some common or often used micro-subroutines are stored in a control memory with higher speed and smaller space. This control memory is called the first level control memory, while the control memory used to store main control microprograms is called the second level control memory. The microsubroutines in the first level control memory may be called on by microinstructions in the second level memory. Sometimes there are more than one first level control memory. Such control mode is referred to as the two level microprogram control. 在有些微程序控制计算机中，一些公共的或常用的微子程序存放在一 个速度更快、容量更小的控制存储器中，这种控制存储器叫做一级控制存储器。而存放主控 微程序的控制存储器叫做二级控制存储器。一级控制存储器中的微子程序可由二级控制存储 器中的微指令来调用。有时一级控制存储器可以不止一个。这种控制方式叫做二级微程序控 制。 |
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