| 摘要 |
PURPOSE:To attain an access at a high speed by using a real address generating circuit which allocates the address values, i.e., the outputs of the X and Y address generating circuits to the address spaces of a real memory, etc. CONSTITUTION:An X address generating circuit 5 calculates the continuous address values including an X direction start address XS through an X direction end address XE. While a Y address generating circuit 6 calculates the addresses including a Y direction start address YS through a Y direction and address YE in the form of the continuous address values with an X direction packing size XSIZE set to a real memory packing size register 8 defined as a step with addition of the XSIZE. Then the address values calculated by both circuits 5 and 6 are allocated to the 1-dimensional address spaces of a real memory, etc., through a real address generating circuit 7. Thus it is possible to calculate the read address value of the real memory, etc., by an adder only. This attains an access at a high speed.
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