| 摘要 |
PURPOSE:To switch transfer busses selectively, by providing a bus selecting switch to switch transfer busses selectively and by causing a direct memory access device to operate the transfer bus selecting switch at the autoload completion time. CONSTITUTION:When a data frame 40 reaches a transmission control interface adapter 33 through a transmission line 37, a direct memory access device (DMAC) 32 DMA-transfers the first data field 41 to the first local memory 12 through a DMA bus and a bus selecting switch 31. When autoload is performed simultaneously with transfer completion, a bus is selected by a signal line 35, and the bus selecting switch 31 is switched to be connected to the second local memory 22, and the second data field 42 is DMA-transferred to the second local memory 22 in the same manner. |
