1. The article was first posted on Aug. 6, 2021

2. Revised on Aug. 10, 2021

     Corrected mistake in Fig. 3.

3. Revised on Sep. 4, 2021

    Updated the assembly code to Ver. 1.1.0. The exponent part is always set to zero when the result of an operation is zero.

    As an application example, Fast Fourier Transform program and execution example were added to the attachment.

    Added single lowercase letters to variable names.

4. Revised on Nov. 4, 2021

    Added  Chapter 11, "Making ROMs of the interpreter" to the Details.