retro-stack

A retro computer project based on stackable PCB boards. This project was largely inspired by Ben Eater's 6502 breadboard computer project.

Project Objective

Design, prototype, and build an 8 bit computer roughly comparable to an Apple II or NES in capabilities.

Hardware Design Goals

Create an 8 bit computer with the following basic capabilities:

• Stable at or near maximum frequency of the processor
• Modular (including reconfigurable address map)
• Character display via RS-232 Serial and LCD
• PS/2 Keyboard Input

Optional:

• Sound generation
• VGA video output
• 10baseT ethernet

Software Design Goals

• Develop a strong understanding of Assembly programming
• Understand and implement the following protocols:
  • UART
  • SPI
  • PS/2
• Learn the basics of PLDs and CUPL to use in "glue logic"
• Develop a moderate to strong understanding of Atmel AVR MCU programming
• Implement a simple Operating System within the constraints of an 8 bit architecture
• Understand and implement both software and hardware interrupts

Repository Layout

This repository contains all of the hardware and software assets in the following structure:

• Hardware Schematics and PCB Layouts
• Firmware
• Tooling (TBD)
• Documentation (TBD)s