CI-2 project log

A project log for Homemade Floating Point Interpreter for 6502

The CI-2 is a homemade floating point simple interpreter language by hand assembling for my 6502 computer PERSEUS-8.

Mitsuru YamadaMitsuru Yamada 08/10/2021 at 13:000 Comments

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.

5. Revised on Dec. 31, 2021, Jan. 4, 2022

    To the Details, added programming & execution example, Fig. 7 "Calculation of natural logarithm function" and corrected Fig. 6.

6. Revised on Jan. 24, 2022

    To the Details, inserted new chapter 10, "Application example", new Fig. 9.

    Added maximum operating clock frequency value to the chapter "Making ROMs of the interpreter".

7.  Revised on Mar. 5, 2022

    To the Details chapter 10, added video link "Homemade Floating Point Interpreter computes FFT".

8. Revised on Apr. 9, 2022

    Updated assembly code version to Ver. 1.2.0, for bug fix for square root function argument zero.

9. Revised on May 13, 2022

    Added Fig. 6 for square root calculation and Fig. 7 for sine function calculation to chapter 6 "Elementary functions".

10. Revised on May 14, 2022

    Added handling of negative arguments to the description of the exponential function calculation in Chapter 6.