【摘要】 本文介绍了用pascal语言实现MC6809交叉汇编程序设计的基本原理、方法,并给出部分程序流程图及交叉汇编结果.MC6809微机由于寻址方式比较丰富,所以汇编难度较大,用Pascal语言实现MC6809微机汇编程序设计,由于pascal语言具有数据类型丰富,语法规则简单,表达方式简洁,清楚等特点,所以本交叉汇编程序的特点是结构化好,简单易读,在标号处理中采用平衡树表提高了汇编速度,将助记码分成十个类型处理大大简化了汇编手续,使程序简单执行速度加快.更多还原

【Abstract】 The basic pinciple and method of progamming MC6809 cross assem bler, along with some flowcharte and a part of resultant cross assembler are introduced. It is programmed by Pascal languageSince MC6809 has great amount of addressing modes, it is complicated to assembly. Pascal language has the characteristics of plenty in data model, simplicity in syntax and clarity in expression, consequent ly the cross assembler here has the advantage of good in structured and easy to read. The assembly time is greatly reduced because the balanced tree table is adopted in label treatment. The mnemonic code is divided into ten types to process, simplifying the process of asembly and speeding up the execution of the program.更多还原