An emulator for the original GameBoy written in Java

This is my attempt at learning to write an emulator. Made in Java since that's my primary language and I just want to learn about the emulation and not a new language.

Goals

• Implement the engine separate so multiple implementations of screens, inputs etc can be made
• Support for switching out the color scheme
• Make an OpenGL implementation for the display
• Joypad support
• Save game support
• Some kind of sound support
• Simple CLI for loading ROMs and configure the emulator
• Pass all test roms (see below)
• Being able to play through a full game without any problems

Non goals

• Gameboy Color support
• Save states
• Fancy GUI
• Serial connection support locally or over internet

Blargg test roms

See COMPABILITY.md for a detailed report how well this emulator passes the Blargg test roms

References, Thanks!

• http://marc.rawer.de/Gameboy/Docs/GBCPUman.pdf
• http://www.codeslinger.co.uk/pages/projects/gameboy/beginning.html
• http://imrannazar.com/GameBoy-Emulation-in-JavaScript:-The-CPU
• http://gbdev.gg8.se/wiki/articles/Main_Page
• https://github.com/taisel/GameBoy-Online