Abstract: This paper introduces a method to develop the software of strapdown inertial navigation system in personal computers, and discusses the whole process from assigning the task of software, developing real-time software, management softwatr, simulation software to running in the special computer systems. The paper also discusses the mixed programming me-thod and its advantages using the C, PL / M-86, and ASM-86 programming languages. The method discussed in the paper is more economical and practical than the ordinary methods which are used in 86 / 380 open systems. The method can be spread for general use to develop the software for 8086-based computers.

Key words: strapdown inertial navigation systems, software development, real-time systems