Method and apparatus for allocating display memory and main memo

Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements

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345185, G06F 1200

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active

056597150

ABSTRACT:
A low-cost, moderate performance small computer system is provided by allowing a single sharable block of memory to be independently accessible as graphics or main store memory. Allocation of the memory is selected programmably, eliminating the need to have the maximum memory size for each block simultaneously. Performance penalties are minimized by dynamically allocating the memory bandwidth on demand rather than through fixed time slices. A reallocatable memory subsystem enables transparent transfer of memory function of a lower-performance memory such as DRAM to occur in conjunction with a memory upgrade to a higher-performance memory such as VRAM, for example.

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