| 摘要 |
PURPOSE:To facilitate the correction and the generation of a microprogram, by storing the microprogram, a reset program, and a loader program in a ROM. CONSTITUTION:When a power source is applied to an adapter 1, an MPU4 in the adapter 1 stores the microprogram stored in a ROM2, to a RAM3 by the reset program stored in the said ROM2, and is started up based on the microprogram stored in the RAM3. When the microprogram stored in the RAM3 is corrected, a loader program stored in the ROM2 is started up by issuing a prescribed command to the said adapter 1 by a CPU, and the microprogram stored in advance in an external memory is written at the RAM3 in the adapter 1. In this way, the microprogram written to the RAM3 from the ROM2 is corrected.
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