Writing an emulator has been on my programming ‘bucket list’ for a long time now. My earliest programming experiences were on early 8-bit microcomputers, and I’ve always enjoyed returning to writing code that is close to the ‘metal’. My initial idea was to write a Atari 2600 VCS emulator because its architecture is absolutely fascinating. However, that architecture also makes it a real challenge to emulate. Perhaps it made sense to start with something simpler?
After a bit of reading around I found that CHIP-8 (https://en.wikipedia.org/wiki/CHIP-8) is a good starting point for would-be emulator authors due to its relatively simple instruction set and architecture. Interestingly CHIP-8 isn’t a physical architecture, it is a virtual machine that was implemented by a number of computers in the 1970 and calculators in the 1980s.Writing a CHIP-8 emulator with Rust and WebAssembly | ScottLogic