| 摘要 |
A display controller for outputting display data stored in a display memory to a display includes an address memory for storing an address, subjected to a write access, of the display memory, and a reciprocal number memory for storing a reciprocal number, calculated by a reciprocal calculator, of the number of display pixels of one horizontal line on the screen. A multiplier multiplies the address stored in the address memory with the reciprocal number calculated by the reciprocal calculator, and a horizontal line number determinator obtains a display line number of the screen on the basis of a multiplication result by the multiplier.
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