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一、一批Z80新指令在研究Z80CPU指令系统的内部规律时,我们将原来的696条具体指令,按功能和字节数的不同进行了重新分类。根据信源码理论,Z80指令系统可分为非续长码指令和准非续长码指令。共有1788种机器码,可完成各种具体操作。但其中多数一直未公布和使用。我们通过实验证明,这些未公布的机器码也能完成一定的操作,它们是又一批应发表的新指令。这些新指令可分为以下五种。 1)数据传送指令:有8位立即寻址和变址寄存器寻址,共有8条,是对文献[1]中84条
First, a number of new instructions Z80 Z80CPU command system in the study of the internal laws, we will be the original 696 specific instructions, according to the function and the number of bytes were reclassified. According to the source code theory, Z80 instruction system can be divided into non-long code instructions and quasi-non-long code instructions. A total of 1788 kinds of machine code, to complete a variety of specific operations. But most of them have not been published and used. We have experimentally proved that these unpublished machine codes can also perform certain operations, and they are another batch of new instructions that should be published. These new instructions can be divided into the following five. 1) Data transfer instructions: There are 8-bit addressing and indexing register addressing, a total of eight, is the literature [1] 84