| 摘要 |
PURPOSE:To realize inexpensive, effective maintenance, by allowing the contents of a package table to be rewritten in response to an interruption signal generated for a CPU. CONSTITUTION:If a fault occurs, a typewriter TYP00 is connected to an input and output controller IOC1 and an interruption operation key is pressed to send an indication of external interruption to a CPUCC. The CPUCC recognizes the external interruption and refers to an address AAA of a storage device for interruption processing to read an analysis program as a processing program for external interruption at an address BBB; and the connection of the typewriter TYP00 is checked and bits at prescribed locations are rewritten to meet requirements of the package table. Then, normal operation from the typewriter TYP00 is allowed through the input and output controller IOC1. |
