Zeighty

Zay-tee

(need to be using 3.8.1.303 editor on my mac, it won't open later versions of the MGCB editor))

C#/MonoGame-based Gameboy Emulator

last updated 5 Dec 2025

next steps:

1. Implement Serial, Timer, Interrupts, DMA as per video
   https://www.youtube.com/watch?v=hrK9nc13vxo
2. More PPU work https://www.youtube.com/watch?v=--Y0J0LRbd0

In-flight

• implement remaining debugger keyboard controls (jump to locations, set breakpoints, edit ram values)
• visualise VRAM - can see tile data but not map etc

To-do

• run some standard test roms to verify CPU emulation
• implement additional debugging features
• start PPU emulation
• interrupt handling
• keyboard/joypad handling
• audio emulation
• cartridge loading (MBC1, MBC2, etc)
• save states
• implement timing/delays to match real hardware speed
• optimize performance
• build a simple UI for loading roms and displaying emulator state
• write documentation and usage instructions

Main-update-draw loop 'states' I will need

• Basic 'run emulator/debugger' (done)
• File requester to load roms/states
• File requester to save states
• Settings menu (audio/video/input)
• Edit value at a memory view address
• Edit memory view address
• Edit breakpoint at a memory address

Done

• Z80 CPU Emulation
• single-step/debugger framework
• moved the console app into MonoGame