| 摘要 |
PURPOSE:To debug software/hardware even if a program can not be transferred from the host side by providing the emulator with a down loading circuit and previously transferring the program from a program memory in a target to an instruction memory in the emulator. CONSTITUTION:The emulator 1 is constituted of the same processor 4 as that of the target 2, a memory storing RAM 5 for the processor 4, a program transferring down loading circuit 10, and so on. Prior to debugging, the contents of the program are previously transferred from the program memory 9 in the target 2 by the down loading circuit 10. The operation is applied to the whole program address space of the whole program address space of the processor 4 at a slow speed by which no problem is generated in the delay of a cable. Even when the program can not be transferred from the host 3, the software/ hardware of the target 3 can be debugged. |
