| 摘要 |
PURPOSE:To obtain a pushup storage with a little hardware, by forming a plurality of pushup storage sections with a storage area and a pushup operation control area used in common. CONSTITUTION:A storage device 1 is provided with a plurality of pushup storage areas MD and the areas MD are sequentially used in ring connection. Further, the storage device 1 is provided with a pushup control informaton area MC used in common, consisting of a storage area start address ST, a pushup storage area excess address SP, a pushup storage area word number SW, a write address save area WT, a readout address save area RD, and a word number save area WD, and first-in information is in first-out without noticing the address of the device 1 itself externally. Through the constitution that a plurality of the up storage areas are formed with one set of the storage device, a lot of pushup storage devices with a little of hardware can be obtained. |
