Computer display controller with reconfigurable frame buffer memory
First Claim
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1. A computer display controller in communication with a frame buffer memory having plural address locations to which display data are directed in accordance with address information provided by a host microprocessor, comprising:
- format storage means for storing address format information corresponding to an address information arrangement for each of plural frame buffer memory configurations representing different arrangements of the address locations in the frame buffer memory; and
address decoding means receiving the address information provided by the host microprocessor and receiving the format information corresponding to a selected one of the frame buffer memory configurations for delivering to the frame buffer memory the address information arranged in accordance with the selected one of the frame buffer memory configurations.
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Abstract
A computer display controller (50) cooperates with a host microprocessor (18) to direct display data to a frame buffer memory (16) in accordance with a selected one of multiple frame buffer memory configurations (20 and 30). The display controller includes an address decoder circuit (58) that delivers address information generated by the host microprocessor to the address inputs (64) of the frame buffer memory in accordance with the selected frame buffer memory configuration.
93 Citations
19 Claims
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1. A computer display controller in communication with a frame buffer memory having plural address locations to which display data are directed in accordance with address information provided by a host microprocessor, comprising:
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format storage means for storing address format information corresponding to an address information arrangement for each of plural frame buffer memory configurations representing different arrangements of the address locations in the frame buffer memory; and address decoding means receiving the address information provided by the host microprocessor and receiving the format information corresponding to a selected one of the frame buffer memory configurations for delivering to the frame buffer memory the address information arranged in accordance with the selected one of the frame buffer memory configurations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a computer system having a host microprocessor that generates display data representing selected ones of a first set of pixels arranged in a first array of rows and columns on a display screen, the host microprocessor directing the display data to address locations within a frame buffer memory in accordance with address information, a display controller that communicates with the host microprocessor and the frame buffer memory, comprising:
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frame buffer memory configuration means for arranging the address information corresponding to substantially all of the address locations in the frame buffer memory in accordance with a selected one of plural frame buffer memory configurations; and means for forming from each frame buffer memory configuration a corresponding display space representing a second set of pixels arranged in a second array of rows and columns, whereby the rows and columns in the first array on the display screen correspond to selected ones of the rows and columns in the second array in the display space. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification