Summary of Creating an Operating System for the NES

00:00:00 - 00:10:00

This video discusses how to create an operating system for the NES. The system is designed to sit on top of the computer's hardware and allow other programs to interact with the computer without having to worry about communicating directly with the physical components. The system is still a little buggy, but it is good enough for the public to experience.

• 00:00:00 The author of this video created an operating system for the Nintendo Entertainment System (NES). The OS is not a command line-based system like DOS, but rather it is a program that sits on top of the hardware of a computer and allows other programs to interact with the computer without having to worry about communicating directly with the physical components of it. The NES also did not come with an operating system, and games were written directly in instructions that the CPU executed on demand. However, Apple took the idea of the graphical user interface from Xerox and created the first operating system for personal computers, which led to the creation of nissos, or NES OSes. Nissos is not a graphical system like Windows or macOS, but rather it is more akin to a virtual game cartridge that is set up in the same way as a physical game cartridge would be. The character realm of a nissos program is broken into two sections of 256 sprites each, one section for foreground sprites and one section for background sprites. However, the NES only can display 64 foreground sprites at a time, so foreground sprites are used to represent larger entities like a Mario or a file. The nes also has background sprites, which must remain on a grid system and are represented by only
• 00:05:00 The video discusses how an operating system for the NES can be created. It discusses the three processors in the NES, the central processing unit (CPU), the audio processing unit (APU), and the picture processing unit (PPU). The program uses these processors to access text data in memory stored in a section of the nes called a name table. The video explains how to save data to the nes using the settings app. The app manages the cursor, desktop color, and file existence. Once a file is saved, the app updates a byte in memory to indicate that the file has been saved.
• 00:10:00 Nisos is an operating system for the NES, and it is still a little buggy. However, it is good enough for the public to experience. You can download a copy of Nisos from the links below. If you want to see more projects like this, then you can click subscribe.