Electrical computers and digital processing systems: memory – Addressing combined with specific memory configuration or... – Addressing extended or expanded memory
Patent
1996-12-06
1999-07-13
Cabeca, John W.
Electrical computers and digital processing systems: memory
Addressing combined with specific memory configuration or...
Addressing extended or expanded memory
711202, 711173, G06F 1206
Patent
active
059241101
ABSTRACT:
A multischeme memory management system for large memory computer systems which combines traditional hardware based memory management with a versatile software based memory management scheme. The memory management system includes a conventional memory handler implemented in hardware for managing memory addresses below a fixed limit, for example four gigabytes; and a plurality of memory handlers implemented in software for managing memory addresses greater than four gigabytes. A programmable memory range detectors is associated with each software implemented memory handler. Memory handlers are selected by addressing the different memory address ranges programmed into the memory range detectors. The memory range detectors associated with the software implemented memory handlers are also prioritized so that lower priority memory range detectors are disabled when a higher priority memory range detector receives an address included within its memory range, thereby resolving conflicts which may otherwise occur when address ranges overlap. The range of addresses associated with the lowest priority memory range detector may be defined to include all memory addresses, thereby establishing the lowest priority memory range detector and its associated software implemented memory handler as defaults for memory addresses greater than four gigabytes.
REFERENCES:
patent: 4685125 (1987-08-01), Zave
patent: 4825358 (1989-04-01), Letwin
patent: 4891752 (1990-01-01), Fairman
patent: 4926322 (1990-05-01), Stimac
patent: 4985871 (1991-01-01), Catlin
patent: 5103394 (1992-04-01), Blasciak
patent: 5161218 (1992-11-01), Catlin
patent: 5182805 (1993-01-01), Campbell
patent: 5303378 (1994-04-01), Cohen
patent: 5438665 (1995-08-01), Taniai et al.
patent: 5455919 (1995-10-01), Brewer
patent: 5487167 (1996-01-01), Dinallo et al.
patent: 5493660 (1996-02-01), DeLano et al.
Bailes, "Memory Management and Multitasking Beyond 640K", ISBN 0-8306-3476-2, Chapter 4 1992.
Browning James L.
Pike Jimmy D.
Cabeca John W.
Chow Christopher S.
NCR Corporation
Stover James M.
LandOfFree
Multischeme memory management system for computer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multischeme memory management system for computer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multischeme memory management system for computer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2288683