| 摘要 |
an emulator in/out unit(11); a target micro computer in/out unit(12) for receiving and sending a command and a data from and to a user system; a CPU(13) for running a user program and a monitor program; a back up register(15) for backing up the CPU by receiving a request signal from the emulator when a monitor program is switched, and recovering it automatically when the user program is returned from the monitor program; a back up register in/out unit(16) for transmitting the emulator request signal to the back up register.
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