公开(公告)号：CA2117391A1

公开(公告)日：1995-01-27

申请号：CA2117391

申请日：1994-07-07

Applicant: IBM

Inventor： SHIMOTONO SUSUMU ,  TATEO KAWAMURA

IPC: G06F1/32 ,  G06F1/00 ,  G06F9/445 ,  G06F11/14 ,  G06F12/00 ,  G06F12/16

Abstract: Provided is an information processing system which prevents data destruction resulting from the replacement of a floppy disk during a low power-consumption mode in which a floppy disk controller and a floppy disk drive are powered off. In the process of returning from hibernation mode to a normal operation mode, an I/O address showing a change line status register of the floppy disk controller is set to a stored register of the trap logic (status 173). When the process returns to the normal operation mode and then an access to the first status register is trapped, a change line status flag value is rewritten (status 174). The OS/driver responds to the faked status and invalidates the floppy disk allocation information in the main memory.