INTERRUPTION PROCESSING METHOD BY PSEUDO INTERRUPTION GENERATED BY ANALYSIS OF INTERRUPTION FACTOR

摘要

PURPOSE:To simplify the generation of an interruption processing routine by providing an interruption factor analyzing process and a pseuro interruption generating process by factor classifications, and preparing separately an interruption processing routine with a user program. CONSTITUTION:When an interruption request is generated in an input/output device 51 and inputted to an interruption control part 21 through an I/F 1, it is written in a register 22 and a generation state is recorded and held, and an interruption signal is sent to a CPU 1. The CPU 1 reads the stage information of respective devices 51-53 from a register 2. The CPU 1 discriminates the device 51 of an interruption requesting origin, generates a pseudo interruption by device classifications in accor dance with the result of analysis, and executes a processing request #51. This excep tional processing request #51 becomes a pseudo interruption corresponding to the device 51. According to this constitution, the interruption signal from the interruption control part 21 is equivalent to a fact that it is switched to one of pseudo interruptions #51-#53, based on the result of analysis of the contents of a state register, an interrup tion routine is executed thereby, and the generation of the interruption processing routine is facilitated.