YahGBA

A Nintendo GameBoy Advance emulator/debugger written in Java.

This was my first emulation project back in 2006. I took it as a learning project rather than a useful one since there are a lot of more advanced GBA emulators around the Web.

Requirements:

• A Java Runtime Environment.
• A GBA BIOS file.
• A GBA ROM file.

Controls:

• A -> X
• B -> C
• R -> D
• L -> S
• Select -> Space
• Start -> Enter

Features:

Implemented:

• ARM7TDMI CPU emulation.
  • 16-bit THUMB CPU support.
  • 32-bit ARM CPU support (still buggy).
  • CPU debugger (step by step execution, instruction disassembler, register viewer, flag viewer, switch memory bank feature).
• Memory emulation.
  • System ROM support.
  • I/O registers support.
  • Palette/video/OAM RAM support.
  • Cartridge SRAM support.
• DMA emulation.
• Timer emulation.
• GFX emulation.
  • Mode 0-4 support.
  • Backgrounds and sprites support.
  • Horizontal/vertical flipping support.
  • Horizontal/vertical offset support.
  • Horizontal/vertical mosaic effect support.
  • Rotating/scaling support (only for backgrounds).
• Misc.
  • HBlank/VBlank emulation.
  • Keypad support.
  • BIN/AGB/GBA/ZIP files support.
  • Pause and reset emulation feature.

Unimplemented:

• Complete GFX emulation.
  • Add mode 5 support.
  • Add window 0-1 support.
  • Add window OBJ support.
  • Add fadein/fadeout effect support.
  • Add alpha-blending effect support.
  • Add rotating/scaling support for sprites.
  • Fix the remaining bugs.
• Add sound emulation.
• Add BIOS emulation (HLE).
• Add SRAM/EEPROM/flash save support.
• Add save state support.
• Add cycle-accurate timing.
• Add memory viewer, I/O registers viewer, map/OBJ/palette viewers, etc.