1. The article was first posted on Apr. 17, 2021

2. Revised on May 2, 2021

      Added a photo of the back panel and power supply in Fig. 9 and its explanation in Chapter 9.

      Added the source code for the marching memory test (Source_code_MEMORY_TEST-1_1_0.pdf) to the attachment.

      Added an inside overall picture (IMG_1577.jpg) and a back side picture (IMG_1578.jpg) to the attachment.

3. Revised on May 22, 2021

     Added the schematic of power supply (PERSEUS-8_Power_supply_schematic_01.JPG) to the attachment.

4. Revised on May 28, 2021

     Added the video (Floating-point arithmetic on homemade computer PERSEUS-8) to the detail.

5. Revised on Aug. 16, 2021

     Added the Chapter 12 (Floating point interpreter for PERSEUS-8).

6. Revised on Nov. 04, 2021

     Added the Fig. 10 "ROMs of the floating point interpreter mounted on the PERSEUS-8 main board" to the Chapter 12.

7. Revised on Mar. 09, 2022

     Changed the chapter 11 (Future plans as of May. 2021) to (Floating point interpreter for PERSEUS-8).

     Added the video (Homemade Floating Point interpreter computes FFT) to chapter 11.

     Added the chapter 12 (ROMs).

8. Revised on Mar. 15, 2023

    Added a picture Fig.8 of a PROM programmer connected to the parallel interface in the Chapter 8 Peripherals. 

9. Revised on Mar. 20, 2023

    Added a video to introduce updating the interpreter by using a homemade PROM programmer for Chapter 12.

10. Revised on Mar. 24, 2023

    Added the schematic of a home made PROM programmer to the attached files and added its links for Chapter 8 and 12.

11. Revised on Jul. 20, 2024

    Added more detailed description of countermeasure for CPU reset sequence defect with the HALT state in the chapter 7.

12. Revised on Aug. 06, 2026.

    Added a PDF version of this project details to the attaches, and added the link to the text.