Information processing system having a floppy disk drive with di

Details Information processing system having a floppy disk drive with di Information processing system having a floppy disk drive with di

1996-01-11

1997-07-15

Auve, Glenn A.

395839, 395481, 395618, 395621, G06F 1300

Patent

active

056492120

ABSTRACT:
Data destruction resulting from the conversion of a floppy disk can be prevented during a low-power consumption mode in which the FDD is powered off. The present invention is also designed to prevent data destruction resulting from the conversion of a floppy disk during a low-power consumption mode in which an FDC and an FDD are stopped. In the process of returning to a normal operation mode, an I/O address showing a change line status register of the FDC is set to a stored register of the trap logic (status 173). When the process returns to the normal operation mode and an access to the first status register is trapped, a change line status flag value is rewritten (status 174). The faked OS/driver invalidates the floppy disk allocation information in the main memory.

REFERENCES:
patent: 4920370 (1990-04-01), Taniguchi et al.
patent: 5287503 (1994-02-01), Narad
patent: 5305180 (1994-04-01), Mitchell et al.
patent: 5339437 (1994-08-01), Yuen
patent: 5339444 (1994-08-01), Nakajima
patent: 5369771 (1994-11-01), Gettel
patent: 5446904 (1995-08-01), Belt et al.

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