Method and apparatus for upgrading a data processing system from

Details Method and apparatus for upgrading a data processing system from Method and apparatus for upgrading a data processing system from

1993-06-30

1996-02-20

Harvey, Jack B.

395281, 395306, 395309, 395650, 395800, G06F 1300, G06F 1326

Patent

active

054936551

ABSTRACT:
A data processing system includes a first central processing unit (CPU), at least one expansion port into which additional CPUs may be inserted, and a system controller. Interrupt circuitry coupled to said first CPU, said at least one expansion port, and said system controller, is configured to allow the dam processing system to operate as a multi-processor system, only one of the first and additional CPUs communicating with the system controller at any one time.

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patent: 4816990 (1989-03-01), Williams
patent: 5101478 (1992-03-01), Fu et al.
patent: 5283904 (1994-02-01), Carson et al.
patent: 5359715 (1994-10-01), Heil et al.
IBM Technical Disclosure Bulletin, vol. 35, No. 3, Aug. 1992, NY US pp. 306-316.
07/872,611 Apr. 22, 1992 (filed).
07/998,879 Dec. 28, 1992 (filed).

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