Abstract: An instruction for transformation processing of an image is detected. An instruction for specifying a targeted image which will be the object of transformation processing is detected. An instruction for specifying a fixed point of the image without changing the position thereof, independent of transformation processing, is detected. Then, the instructed transformation processing is executed on the targeted image. The targeted image is displayed such that the fixed points of the targeted image before/after image processing are matched.

Abstract: A DRAM is constructed by a memory section, a multiplexer (MPX), an inverting circuit and a non-inverting circuit. The memory section stores data transferred through a data bus. The multiplexer selects a width of the data bus based on a mode signal for designating the bus width. The mode signal is shown by a MODE0 signal. The inverting circuit inverts writing data and/or reading data based on a mode signal for designating inversion of data. This mode signal is shown by a MODE1 signal. The non-inverting circuit stops transmission of non-inverted data at an inverting time and passes or transmits data at a non-inverting time on the basis of the MODE1 signal. In this structure, a plurality of access methods can be used with respect to a single DRAM so that extendability of the DRAM is improved and a high speed access operation is performed.