| 摘要 |
PURPOSE:To realize a variable loading of an initial program, by providing a WCR when loading the initial program into an optional address of a memory in a channel with a prescribed length and then carrying out a process by the contents of the WCR and through an MPU. CONSTITUTION:An initial program in the region of an address A having a length L in a main memory 2 is loaded into the region of an address B of a RAM13 of the channel CMC3 by a command of a CPU1. In this case, the address B region of a RAM13, the address A region of the memory 2 and the number of bytes showing the length L are written along with the type of command into a write control register WCR15. These contents are decoded by a microprocessor MPU11, and then a command is indicated to start a DMA control circuit 19. Then the address A and the length L of the memory 2 are loaded into the address B of the RAM13 under the control of the loading program in a ROM12. |
