Lowe, Price, LeBlanc & Becker
Video memory with write mask from vector or direct input
 A video memory includes a data storage section having a predetermined bit width of data writing and reading. A data input terminal has a predetermined bit width and is subjected to input data which represents at least a write start position and a write end position. Mask data are generated on the basis of the write start position and the write end position represented by input data. The mask data are fed to the data storage section. Write data are generated. The write data are fed to the data storage section. The bit width of data writing and reading of the data storage section is greater than the bit width of the data input terminal. 
Matsushita Electric Industrial Co., Ltd.
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Toshiki
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