TOSHIBA USIO21 交换机 模块进口备件

TOSHIBA USIO21 交换机 模块进口备件

1、USIO21设计机器的指令系统:规定指令的种类、指令的条数以及每一条指令的格式和功能;

2、USIO21初步的总体设计:如寄存器设置、总线安排、运算器设计、部件间的连接关系等;

3、USIO21绘制指令流程图:标出每条指令在什么时间、 什么部件进行何种操作;

4、USIO21编排操作时间表:即根据指令流程图分解各操作为微操作,按时间段列出机器应进行的微操作;

5、USIO21列出微操作信号表达式，化简，电路实现。

基本组成:

1、USIO21指令 寄存器用来存放正在执行的指令。指令分成两部分:操作码和地址码。操作码用来指示指令的操作性质，如加法、减法等;地址码给出本条指令的操作数地址或形成操作数地址的有关信息(这时通过地址形成电路来形成操作数地址)。有一种指令称为转移指令,它用来改变指令的正常执行顺序，这种指令的地址码部分给出的是要转去执行的指令的地址。 

TOSHIBA USIO21 交换机 模块进口备件

1. USIO21 Design the instruction system of the machine: specify the types of instructions, the number of instructions and the format and function of each instruction;

2. Preliminary overall design of USIO21: such as register setting, bus arrangement, arithmetic design, connection relationship between components, etc.;

3, USIO21 draw instruction flow chart: mark each instruction at what time, what part to perform what operation;

4, USIO21 scheduling operation schedule: according to the instruction flow chart decomposition of each operation into micro-operations, according to the time period to list the machine should carry out micro-operations;

5, USIO21 lists the microoperation signal expression, simplification, circuit implementation.

Basic composition:

1. The USIO21 instruction register is used to store the instructions being executed. The instruction is divided into two parts: the operation code and the address code. The operation code is used to indicate the operation nature of the instruction, such as addition, subtraction, etc. The address code gives the operand address of this instruction or information about forming the operand address (in this case, the address formation circuit is used to form the operand address). There is an instruction called the transfer instruction, which is used to change the normal execution order of the instruction, the address code part of this instruction gives the address of the instruction to be forwarded to the execution.