System for substituting protected mode hard disk driver for real

Details System for substituting protected mode hard disk driver for real System for substituting protected mode hard disk driver for real

1995-02-28

1998-01-20

Lee, Thomas C.

Boots, shoes, and leggings

395500, 395681, 3642548, G06F 9445

Patent

active

057109419

ABSTRACT:
A protected mode operating system utilizes a protected mode hard disk driver which bypasses an existing real mode hard disk driver on computer systems in which the real mode hard disk driver performs geometry translation of hard disk addresses. The protected mode hard disk driver determines a geometry translation based on geometry data retrieved from the computer systems' hard disk, then verifies whether the geometry translation is utilized by the existing real mode hard disk driver by trapping accesses to hard disk input/output ports, and issuing read requests to the existing real mode hard disk driver at plural hard disk addresses.

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