"MCS® 251指令集详解：opcode映射、指令摘要及详细描述"

The MCS 251 architecture is a processor family developed by Intel, with its instruction set detailed in the document "8xc251_instr.pdf". This comprehensive reference material contains an opcode map, a summary of instructions, and detailed descriptions of each instruction, including lengths and execution times. The document is divided into tables that explain the notation used for instruction operands and control instruction destinations. Table A-1 through A-4 provides clarification on operand notation, while Table A-5 specifies the notation for control instruction destinations. The MCS 251 instruction set consists of a wide range of operations that allow for efficient and versatile programming. Each instruction is carefully designed to perform specific tasks, with varying execution times and lengths. By referring to this instruction set reference guide, programmers can better understand the capabilities of the MCS 251 architecture and optimize their code for improved performance. The opcode map included in the document serves as a visual reference for locating specific instructions and understanding their functions. With this map, programmers can easily navigate through the vast array of instructions available in the MCS 251 architecture. Additionally, the detailed descriptions provided for each instruction offer valuable insights into their usage and potential applications in programming. Overall, the Intel 80251 Instruction Set Reference is a valuable resource for both novice and experienced programmers working with the MCS 251 architecture. By familiarizing themselves with the instructions outlined in this document, developers can leverage the full potential of the processor family and create efficient and reliable code. Whether executing simple arithmetic operations or complex control flow tasks, the MCS 251 instruction set provides a robust foundation for diverse programming needs.