Bus interface with graphics and system paths for an integrated m

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395164, G06F 1500

Patent

active

054505429

ABSTRACT:
A low-cost computer system which includes a single shared memory that can be independently accessible as graphics memory or main store system memory without performance degradation. Because the "appetite" for main system memory (unlike that of a display memory) is difficult to satisfy, the memory granularity problem can be addressed by programmably reallocating an unused portion of a display memory for system memory use. Reallocation of the unused display memory alleviates any need to oversize the display memory, yet realizes the cost effectiveness of using readily available memory sizes. Further, reallocation of the graphics memory avoids any need to separately consider both the system memory and the display memory in accommodating worst case operational requirements.

REFERENCES:
patent: 5335322 (1994-08-01), Mattison
Gwennap, Linley, "Alpha Hits Low End with Digital's 21066--First Microprocessor to Integrate PCI Bus Interface", Microprocessor Report, vol. 7, No. 12, pp. 1, 6-8 and 16, Sep. 13, 1993.
64200 (Wingine.TM.) High Performance "Windows.TM. Engine", Chi8ps and Technologies, Inc. Revision 0.6, pp. 5-11 and 96-97, Jul. 1992.

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