| 摘要 |
Comprising a data memory region for data and pointer memory sections for pointers controlling transfer of the data to or from an I/O device for a CPU, a memory for DMA comprises in each pointer memory section a one-bit memory area for a discrimination or skip bit (Bi) indicative of whether the tran sfer should proceed or be skipped at one of the data that is controlled by the pointe r stored in the pointer memory section under consideration. Preferably, the discrimination bit represents binary zero and one values when the transfer shoul d proceed and be skipped, respectively. It is preferred to form a DMA controller together with the memory in an LSI semiconductor device.
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