微机单步执行控制显示卡电路的原理及应用  

Concept and Application of Microcomputer Single-step Control Display Circuit

作　　者：杨师宣[1] 

机构地区：[1]江汉石油学院计算机科学系,湖北荆州434023

出　　处：《石油天然气学报》2003年第z1期167-168,共2页Journal of Oil and Gas Technology

摘　　要：为检查总线故障专门设计了微机单步执行控制与显示卡。电路采用单步控制方式,从开机起,每执行一条指令,就把地址和指令代码用16进制一同显示在LED上,以达到检查CPU在复位后计算机系统数据总线和地址总线是否复位,进而对微机系统总线故障进行测试。A microcomputer single-step control and display card is designed for pupose of checking bus failure. Singie-step control mode is employed in the circuit, from the stating up. codes of address and instruction in 18 bit are simultaneously displayed in LED as every instruction is implemented by a computer to check if the data bus and address bus are reset for the computer system after CPU is reset, thus failure detection is conducted on the computer system.

关 键 词：微型计算机 数据总线 地址总线 故障检测 单步执行控制 显示卡 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]