CMP CONTROL SYSTEM

摘要

PURPOSE:To obtain a means which can check the fault of a CMP before the rise of an OS by performing a retrying job in a user mode and delivering the control of a mini-OS in a maintenance mode in case an error occurs during the execution of an initial diagnosing. CONSTITUTION:A mini-OS 12 is stored in a nonvolatile memory 7 together with an initial diagnosing program 10 and a loader 11 and then prepared in a main memory 4 and held there until the execution of an OS 13 is started. Then the mini-OS 12 is started in a maintenance mode according to the state of a changeover switch 16 in case the fault of the CMP. Thus a fault checking means is offered to a maintenance operator. While a retrying job can be continued as conventional in a user mode.