| 摘要 |
A DMA mechanism for accessing a selected portion of an information storage matrix subdivides the matrix into a plurality of tiles, each containing a sub-matrix of addressable storage locations. Address codes for accessing a block of tiles that correspond to the selected portion of the matrix are generated by storing the starting address of a first row of a first prescribed tile of the block and successively addressing groups of storage locations within each of the successive rows of that tile, by combining word and line address modifiers with the starting line address. Using additional codes which delineate the size of the block, this process is repeated, as necessary, on a tile-by-tile basis, for each tile in the block. |
