| 摘要 |
PURPOSE:To increase the stable quality of system with a simple constitution, by providing a duplicated processing system device and one backup file in an exchange system, and enabling the file replacement through the restart of phase 1 if file replacement is caused by the request of extension. CONSTITUTION:A console TTY for main storage device MM0, MM1 maintenance, backup file CMT and file memory FM are connected to central processors CC0, CC1 of ACT(normal use) and SBY(spare) systems, a communication register REG between CCs is connected between the CC0 and CC1. In case of file replacement, the CMT is re-inserted to a new file, a file switching instruction is given from the TTy, and an initial program loading is in on-line transfer from the CC0 to the CC1 through write-in means of the MM1 and the program of the CC1 is started through the control instruction of the CC0. The new file is stored in the MM1 by the CC1 and the call during communication is transferred to the CC1 via a REG. |
