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Gamulator

This emulator, except for some quircks, kinda works.

  • Kirby Dream Land works fine (the game can be finished)
  • Castlevania II seems to be okay except for some mysterious sprite flickering
  • The Legend of Zelda: Link's Awakening seems fine
  • Pokémon blue freezes when you go to a Pokémon Center for some unknown reason

Tests:

  • Blargg's cpu_instr, instr_timing, int_time are okay
  • Mooneye-gb's MBC1 ram/rom, are okay

Debug it

When launched with --show-instr the emulator generates a trace. This trace is particularly hard to read as a text file, so I wrote reverse engineering tools.

Code Rebuilder

This takes the trace as an input, a memory symbols table file, and follows calls and rets to find code and bundle it as functions blocks.

Code debugger

This intends to mimick a gdb interface to read the trace. You don't have memory / registers inspection for obvious reasons, but can put breakpoint and all those navigation stuff that help you to make sense of the code in a dynamic way