目前,在我国采用86/300系列微型计算机和iRMX操作系统的用户日益增多。由于iRMX是一个功能很强的实时多任务操作系统,使它在工业控制的各个领域中得到越来越广泛的应用。很多用户在他们的应用中需要扩充系统的中断源,本文通过实例介绍我们在某工程中解决中断源扩充的一些经验和体会。一、8259(PIC)概述 86/300系列机一般采用ISBC86/30单板机作为主处理机板。该机使用一片8259A(以下简称PIC)来管理中断。 PIC在中断驱动的系统中相当于一个总 Currently, in our country with 86/300 series of micro-computer and iRMX operating system users are increasing. Because iRMX is a very powerful real-time multitasking operating system, it is more and more widely used in various fields of industrial control. Many users need to expand their system interrupt sources in their applications. This article introduces some experiences and experiences of how to solve the expansion of interrupt sources in a project. A, 8259 (PIC) Overview 86/300 series machines generally use ISBC86 / 30 SBC as the main processor board. The machine uses a piece of 8259A (hereinafter referred to as PIC) to manage interrupts. PIC in the interrupt-driven system is equivalent to a total