| 摘要 |
PURPOSE:To achieve high speed processing and low cost, by constituting a device with one high speed buffer memory and a plurality of low speed stack memories. CONSTITUTION:Data transfer between a high speed buffer memory 1 and low speed memory stacks 2-1-2-n is made by block unit. When readout or write-in request for environmental information is made, if a block determined with a stack pointer register 4 is in existence in a high speed buffer memory 1, is checked. If a block coincident with the block determined with the register 4 is not in existing in the high speed buffer memory , either one of a block B1 to B3 is assigned to the block to the block determined at the register 4. |
