6502 Emulator

This project is about creating an Emulator for my 6502-Computer.

Roadmap

• Create basic structure and interfaces
• Load data in ROM
• Basic CPU & RAM functionality
• Complete CPU functionality
• Handle IO
• Interactive CLI

Story

This is a replica of the BE65 from Ben Eater

Why I built it?

• I have always wondered what exactly happens in a computer, when I started writing my first programs with java it didn't really answer my questions but rather raised more questions. Then one day a video of Ben Eater was suggested to me and I was immediately enthusiastic about the idea of building a computer myself.

Building

• So that I don't lose track of the cables, I opened the schematics on my Ipad and marked each completed connection in green.
• Thanks to Ben Eater's videos, I was able to understand what the individual components do during construction.

Problems

• Get all the parts you need for the computer without spending a to much money

Functions

• reading and display inputs of a PS2 Keyboard
• interact with a other computer by RS232

Information about the computer

Main components

• The processor is the 6502, while the 6522 is used for I/O. The 28c256 is used as Rom and the 62256 as Ram.

Memory layout

$0000 - $3fff RAM

$6000 - $600f I/O

$8000 - $ffff ROM

Conclusion

• It was a very instructive project in terms of my understanding of computers and electronics in general.

Future plans

• create my own little os for the computer
• self-built gpu for the computer to be able to use it on a monitor

Credits

Originally, I was inspired by Ben Eater to build my version of 6502 computer.