Low-cost display controller comprising a DMA or communications c

Details Low-cost display controller comprising a DMA or communications c Low-cost display controller comprising a DMA or communications c

1990-04-10

1993-06-22

Shaw, Dale M.

395162, 395163, G06F 1520

Patent

active

052222136

ABSTRACT:
A DMA or communications controller, such as a DMA serial controller, operating under control of, and in cooperation with, a microprocessor together perform the functions of, and hence replace, a bit-mapped display controller, thereby avoiding the cost of the display controller. The microprocessor is programmed to cause the DMA or communications controller to transfer image data to a display, like the display controller. Under the processor's repeated commands, the communications controller transfers data representative of an image from a memory to the display a line of a frame of the image at a time. The processor generates control signals, such as horizontal and vertical sync signals, to cause the display to display the image represented by the transferred data.

REFERENCES:
patent: 4204208 (1980-05-01), McCarthy
patent: 4486856 (1984-12-01), Heckel et al.

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