| 摘要 |
PURPOSE:To facilitate the change, the addition, etc., of programs by transferring a microprogram to a 2nd memory from a 1st memory and carrying out the microprogram via the 2nd memory. CONSTITUTION:A ROM 1 has a large capacity and a low speed and is rewritable. A RAM 3 has a medium capacity and a high speed and receives an edited microprogram from the ROM 1 via a transfer circuit 2. The microprogram received from the circuit 2 is changed to a horizontal type from a vertical type. At this time point, the ROM 1 and the circuit 2 are separated from a microprogram control part 8. Hereafter the part 8 carries out the normal microprogram control via the RAM 3. As a result, the microprogram can be easily changed with the inexpensive hardware.
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