| 摘要 |
<p>PURPOSE:To attain an efficient processing system, incorporating a memory which has been constituted so as to write or read out each instruction in accordance with the same address designation control. CONSTITUTION:An incorporated ROM for storing in advance a processing program for executing voice composite control consists of 16 bits, and an external ROM for storing a main program consists of 8 bits. When reading a data from the external ROM, address information of a data to be read is set to a data pointer DP. Also, when executing a program instruction of the sound composite control or main program instruction, a value of a counter PC is counted up whenever an instruction of a step designated by the program counter PC is executed, and it is executed in order. As for a program of the sound composite control, 1 step consists of 16 bits and is long, therefore, even in case of a system clock which is comparatively slow, sound composition whose high speed operation is required can be executed.</p> |
