A new release of mGBA, version 0.9.1, is available. This version is a bugfix release, which contains many important fixes for bugs not caught before 0.9.0 was released. Importantly, fixes for save states affecting both GBA and GBC, the OpenGL renderer lagging when fast-forwarding, and improved detection of Pokémon ROM hacks. An extensive list of changes follows after the cut.

Emulation fixes:

  • ARM: Fix LDM^ with empty rlist (fixes #2127)
  • Core: Fix first event scheduling after loading savestate
  • GB Serialize: Fix switching speed modes when loading a state (fixes #2097)
  • GB: Fix skipping BIOS
  • GBA Memory: Fix loading Thumb savestates when in ARM mode
  • GBA Video: Fix window start on modes 3-5 with mosaic (fixes #1690)
  • GBA Video: Fix mode 3-5 overflow with mosaic (fixes #1691)

Other fixes:

  • GBA: Fix non-USA 1.0 FireRed misdetecting as a ROM hack (fixes #2100)
  • GBA: Fix crash when ROM loading fails
  • GBA e-Reader: Fix bitmap short strip scanning
  • GBA Video: Fix mode 5 frame 1 caching (fixes #2075)
  • GBA Video: Don’t attempt to copy invalid registers when switching renderer
  • Qt: Fix crash when switching from high-resolution OpenGL renderer to software
  • Qt: Fix OpenGL renderer lagging behind when fast-forwarding (fixes #2094)
  • Qt: Fix smudged window icon on Windows
  • Qt: Fix saving settings enabling camera when camera name changes (fixes #2125)
  • Qt: Fix frames getting backlogged (fixes #2122)
  • Qt: Restore maximized state when starting (fixes #487)


  • Core: Truncate preloading ROMs that slightly exceed max size (fixes #2093)
  • GBA: Default-enable VBA bug compat for Ruby and Emerald ROM hacks
  • GBA Memory: Log GPIO writes on non-GPIO carts as Pak Hardware instead of Memory
  • Qt: Add ROM filename and size to bug reporter
  • Qt: Improve handling of disabling VBA bug compat mode (fixes #2129)

Get it now in the Downloads section. Binaries are available for Windows, Ubuntu, macOS, 3DS, Switch, Vita, and Wii, and the source code is available for all other platforms.