Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1995-03-31
1998-08-18
Lee, Thomas C.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
395854, 395872, 395446, 39549702, 345126, 345127, G06F 1314, G06F 1328, G06F 1502
Patent
active
057970335
ABSTRACT:
A method and arrangement for receiving data in a direct memory access (DMA) controller and storing the received data in a host memory in a computer system determines the size of the packets of data to be transferred. The host memory is subdivided into large memory areas for storing large packets of data and small memory areas for storing small packets of data. A packet size determiner determines whether the packet of data to be transferred is a large packet of data or a small packet of data and provides a signal to the DMA controller. In response to this signal, the DMA controller selects a large memory area of the host memory for storing the data when the received data is determined to be a large packet of data and selects a small memory area of the host memory for storing the data when the received data is determined to be a small packet of data. This efficiently utilizes the host memory since small packets of data are placed only in correspondingly small memory areas and not in excessively large memory areas that could be used for other purposes by a processor in the system.
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Cirrus Logic Inc.
Lee Thomas C.
Nguyen Frank D.
Perveen Rehana
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