This blog post chronicles a personal project to build a functioning 8-bit computer from scratch, entirely with discrete logic gates. Rather than using a pre-designed CPU, the author meticulously designs and implements each component, including the ALU, registers, RAM, and control unit. The project uses simple breadboards and readily available 74LS series chips to build the hardware, and a custom assembly language and assembler are developed for programming. The post details the design process, challenges faced, and ultimately demonstrates the computer running simple programs, highlighting the fundamental principles of computer architecture through a hands-on approach.
The MSXbook OneChipMSX is a compact, portable MSX2 computer contained within a book-like form factor. It features a Raspberry Pi RP2040 microcontroller emulating a Z80 processor, offering a faithful MSX2 experience. The system includes a membrane keyboard, a small LCD screen, integrated SD card storage for ROMs and data, and various ports for connecting peripherals like joysticks and external displays. Intended for retro gaming and MSX development, the OneChipMSX aims to provide a convenient and affordable way to enjoy the classic MSX platform.
Hacker News users discussed the OneChipMSX's appeal stemming from nostalgia for the MSX standard, particularly in Europe and South America. Several commenters reminisced about their experiences with MSX computers in their youth. Some expressed interest in the device but questioned the high price, while others debated the practicality of emulating MSX versus owning dedicated hardware. The open-source nature and FPGA implementation were praised. There was some discussion about potential use cases like introducing younger generations to retro computing or connecting to CRT televisions for an authentic experience. The lack of a built-in keyboard was also noted.
This project details the creation of a minimalist 64x4 pixel home computer built using readily available components. It features a custom PCB, an ATmega328P microcontroller, a MAX7219 LED matrix display, and a PS/2 keyboard for input. The computer boasts a simple command-line interface and includes several built-in programs like a text editor, calculator, and games. The design prioritizes simplicity and low cost, aiming to be an educational tool for understanding fundamental computer architecture and programming. The project is open-source, providing schematics, code, and detailed build instructions.
HN commenters generally expressed admiration for the project's minimalism and ingenuity. Several praised the clear documentation and the creator's dedication to simplicity, with some highlighting the educational value of such a barebones system. A few users discussed the limitations of the 4-line display, suggesting potential improvements or alternative uses like a dedicated clock or notification display. Some comments focused on the technical aspects, including the choice of components and the challenges of working with such limited resources. Others reminisced about early computing experiences and similar projects they had undertaken. There was also discussion of the definition of "minimal," comparing this project to other minimalist computer designs.
Summary of Comments ( 45 )
https://news.ycombinator.com/item?id=43533715
HN commenters discuss the educational value and enjoyment of Ben Eater's 8-bit computer project. Several praise the clear explanations and well-structured approach, making complex concepts accessible. Some share their own experiences building the computer, highlighting the satisfaction of seeing it work and the deeper understanding of computer architecture it provides. Others discuss potential expansions and modifications, like adding a hard drive or exploring different instruction sets. A few commenters mention alternative or similar projects, such as Nand2Tetris and building a CPU in Logisim. There's a general consensus that the project is a valuable learning experience for anyone interested in computer hardware.
The Hacker News post "Build an 8-bit computer from scratch (2016)" has a moderate number of comments, discussing various aspects related to the linked Eater.net article about building an 8-bit computer. Several commenters express excitement and nostalgia for the Ben Eater series, praising its clarity and educational value. They appreciate the hands-on approach and the way it demystifies computer architecture.
A key discussion revolves around the benefits of such projects for learning. Commenters note how building a computer from basic components provides a deep understanding of how computers work at a fundamental level, contrasting this with higher-level programming or software development. Some commenters share their own experiences of following the tutorial and the insights they gained.
Some comments delve into the specifics of the project, such as the choice of components, the complexity of the instruction set, and the potential for expansion. There's mention of alternative or similar projects like Nand2Tetris and From Nand to Tetris, comparing and contrasting their approaches to teaching computer science concepts.
A few commenters also touch on the broader implications of understanding computer architecture, arguing it fosters a greater appreciation for the complexity and ingenuity of modern computing. They emphasize the importance of this knowledge in a world increasingly reliant on technology. Some express the sentiment that this type of project can be inspirational for aspiring engineers and programmers. Finally, there's some light discussion about the cost and time commitment involved in undertaking such a project.