This article gives a detail discussion on the assembled code optimization from instruction arrangement, register division, condition selection branch and cycle structure based on the core of ARM9TDMI.
本文基于ARM 9tdmi内核，从指令调整、寄存器分配、条件分支和循环结构等方面对汇编代码的优化方法进行了详细的论述。
Based on the concept of visual thinking, the effectiveness of visual perception and the representation of teaching content are discussed in the classroom instruction for mechanical structure drawing.
本文从视觉思维的概念出发，探讨机械结构图教学过程中教学内容的表现形式与视知觉有效性相关的问题。
Summarization about calculator circuits based on 4 bit embeded system is given, include block diagram and work principle, the instruction system, the structure of MCU core and the I/O.
对基于4位嵌入式微控制器的计算器电路进行了综述，包括功能框图与工作原理、指令系统、内核硬件结构以及系统与外界接口等。
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