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LX—1是一台微处理机的整体电路原型,它作为一个设计方法,用以研究与设计及以大规模集成电路构成类似计算机的有关问题。文中强调了LX—1的结构简单,讨论了支持编程序的装置和模拟装置,并且举了例子。微处理机的主要控制部分是以256字64位的控制存贮器来实现的,其余的逻辑划分成极少几种独特的功能逻辑电路。有16个通用的16位寄存器和一个256字16位的暂存存贮器。周期是70毫微秒。具有加法运算、按位逻辑运算、阵列移位和阵列乘法运算等逻辑功能。为了确证能够在实时数字信号处理中使用小型通用微程序计算机,研究了利用LX—1作为数字音码器的应用。在这种应用中,宁可用微程序处理机而不用专用机的好处是因为这样一台通用机的成本较低,并且能够改变微程序而提供了灵活性。描述了音码器的频谱分析器的主要部分和它在LX—1模拟器上的操作。结果表明,在LX—1原型上的频谱分析器有希望与最少的附加设备,例如与一个200个取样输入缓冲器一起进行实时操作。况且,所提出的LX—1的大规模集成方案能够以一半双重模式操作,既作分析又作综合,或者处理几个输入通道。
The LX-1 is a microprocessor-based monolithic circuit that serves as a design methodology for researching and designing and developing a similar computer as a large scale integrated circuit. The paper emphasizes the simple structure of the LX-1, discusses the devices and simulation devices that support programming, and gives an example. The microprocessor’s main control part is 256 words 64-bit control memory to achieve the rest of the logic is divided into very few unique functional logic. There are 16 general-purpose 16-bit registers and a 256-word 16-bit scratchpad. The period is 70 nanoseconds. Logic functions such as addition, bitwise logic, array shift and array multiplication. In order to confirm the ability to use a small general-purpose microprogrammer in real-time digital signal processing, the use of LX-1 as a digital vocoder has been studied. The advantage of using a microprogrammer instead of a dedicated machine in such an application is due to the lower cost of such a general purpose machine and the flexibility to change the microprogram. Describes the main part of the codec’s spectrum analyzer and its operation on the LX-1 simulator. The results show that the spectrum analyzer on the LX-1 prototype is promising with minimal additional equipment, such as real-time operation with a 200 sample input buffer. Moreover, the proposed LX-1’s large-scale integration solution can operate in half dual mode, both for analysis and synthesis, or for processing several input channels.