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目前,由微机控制的医疗仪器日益增多,许多故障涉及微机部分。作者曾检修过一台北京核医疗仪器厂生产的γ心功能测定仪,仪器的控制部分为一台TRS-80微计算机,该机RAM容量16KB(千位),字长8位,控制程序用BASIC语言写成。正常TRS-80机通电后,屏幕上应显示“MEM SIZE?”字样,询问用户是否设定内存保留区。若先输入一任意数x再回车,机器便将最高X个单元的内存加以保留,用户程序将不能进入该保留区;若直接按回车键,机器视输入的内存保留单元数为零,用户可使用全部内存。这两种操作,都可使机器进
At present, the computer-controlled medical equipment is increasing, and many failures involve the microcomputer part. The author has overhauled a Beijing nuclear medical instrument factory production of gamma function tester, the instrument control part of a TRS-80 microcomputer, the machine RAM capacity of 16KB (thousands), the word length of 8, the control program Written in BASIC Normal TRS-80 machine power, the screen should display “MEM SIZE?”, Asking the user whether to set the memory reserved area. If you enter an arbitrary number of x and then press Enter, the machine will be the highest X units of memory to be retained, the user program will not be able to enter the reserved area; if you press the Enter key, the machine as the input memory reservation unit is zero, The user can use all memory. These two operations, can make the machine into