Cryptography – Equipment test or malfunction indication
Patent
1993-01-07
1995-01-03
Gregory, Bernarr E.
Cryptography
Equipment test or malfunction indication
380 4, 380 23, 380 25, 380 49, 380 50, H04L 900
Patent
active
053793420
ABSTRACT:
A personal computer system compatible with application programs and operating system software. The personal computer system includes a microprocessor electrically coupled to a data bus, non-volatile memory electrically coupled to the data bus, volatile memory electrically responsive to the data bus and a direct access storage device electrically responsive to the data bus, the direct access storage device storing a second portion of operating system microcode. The non-volatile memory stores a first portion of operating system microcode and the direct access storage device stores a second portion of operating system microcode. The second portion of operating system microcode includes a boot program. The first portion of operating system microcode verifies the integrity of the boot program prior to loading the boot program into the volatile memory.
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Arnold William C.
Bealkowski Richard
Babayi Robert S.
Gregory Bernarr E.
International Business Machines Corp.
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