Hi, is there any reason why pull requests are not being merged to the FUSE core ? There are 8 waiting now (couple are dupes) and one of them has been there since Dec 2024 ?
If someone could merge all of dotkovals and rtomasas that would greatly be appreciated.
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Anything ? It would be good if you could explain why the pull requests aren’t getting merged. Just complete silence. Is this core considered dead ?
Hey, sorry, nobody is actively maintaining that core, and I didn’t get any notification for the PRs. Now that I’ve seen them, I’ll see about getting some other eyes on them and hopefully get some/all of them merged in the near future.
Thanks for replying. When merging, I think 'metallic77's is a dupe of 'rtomasa's and not sure about the netplay ones. So all of 'dotkoval's and 'tomasa's.
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I notified a guy with merge rights, but he’s been busy doing other stuff, sorry. I’ll poke him again.
After updated cores on Android just now, loaded a ZX spectrum game, Retroarch crashed and burned. It seem like updating fuse, it stopped for a while there.
First suspect would be they used a pixel format other than what core expects so it hangs immediately.
[Config] Saved config to "/storage/emulated/0/Android/data/com.retroarch.aarch64/files/retroarch.cfg".
[Content] Updating firmware status for: "/data/user/0/com.retroarch.aarch64/cores/fuse_libretro_android.so" on "/storage/emulated/0/RetroArch/system".
[Core] No content, starting dummy core.
[Core] Unloading core...
[Core] Unloading core symbols...
RetroArch 1.22.2 (Git 69a4f0e)
=== Build =======================================
Capabilities: ASIMD
[INFO] Version: 1.22.2
[INFO] Git: 69a4f0e
[INFO] Built: Nov 20 2025
[INFO] =================================================
[Input] Found input driver: "android".
[Core] Loading dynamic libretro core from: "/data/user/0/com.retroarch.aarch64/cores/fuse_libretro_android.so".
[Override] Redirecting save file to "/storage/emulated/0/RetroArch/saves/Fuse/Fuse.srm".
[Override] Redirecting save state to "/storage/emulated/0/RetroArch/states/Fuse/Fuse.state".
[Environ] GET_VFS_INTERFACE. Core requested version >= V3, providing V3.
[Environ] SET_SUPPORT_NO_GAME: yes.
[Environ] GET_CORE_OPTIONS_VERSION.
[Environ] SET_CORE_OPTIONS_V2.
[Environ] SET_CONTROLLER_INFO.
[Environ] GET_DISK_CONTROL_INTERFACE_VERSION.
[Environ] SET_DISK_CONTROL_EXT_INTERFACE.
[Remap] Core-specific remap found at "/storage/emulated/0/RetroArch/config/remaps/Fuse/Fuse.rmp".
[Environ] GET_LOG_INTERFACE.
port 0 device 00000101
port 1 device 00000201
port 2 device 00000103
[Environ] SET_PIXEL_FORMAT: RGB565.
[Environ] SET_INPUT_DESCRIPTORS.
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Windows sinked too, just now updated cores. I don’t know if it’s a recent fix not incorporated yet.
[INFO] RetroArch 1.22.2 (Git f69da30)
[INFO] === Build =======================================
[INFO] CPU Model Name: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4 SSE42 AES AVX AVX2
[INFO] Version: 1.22.2
[INFO] Git: f69da30
[INFO] Built: May 26 2026
[INFO] =================================================
[INFO] [Input] Found input driver: "dinput".
[INFO] [Environ] SET_PIXEL_FORMAT: RGB565.
[INFO] [Core] Version of libretro API: 1, Compiled against API: 1
[INFO] [Core] Geometry: 320x240, Aspect: 1.333, FPS: 60.01, Sample rate: 48000.00 Hz.
[INFO] [Video] Set video size to: fullscreen.
[INFO] [Vulkan] Vulkan dynamic library loaded.
[INFO] [Vulkan] Found GPU #0: "Intel(R) HD Graphics 630".
[INFO] [Vulkan] Found GPU #1: "NVIDIA GeForce GTX 1060".
[INFO] [Vulkan] Using GPU #0: "Intel(R) HD Graphics 630".
[INFO] [Vulkan] Queue family 0 supports 1 sub-queues.
[INFO] [Vulkan] Got 3 swapchain images.
[INFO] [Vulkan] Using resolution 1920x1080.
[INFO] [Vulkan] Using RGB565 format.
[INFO] [Vulkan] Loading stock shader.
[INFO] [XInput] Found XInput v1.4.
[INFO] [Input] Found joypad driver: "dinput".
[INFO] [Video] Found display server: "win32".
[INFO] [Audio] Set audio input rate to: 47993.72 Hz.
[INFO] [MMDevice] Initializing default eRender device...
[INFO] [WASAPI] Client initialized (shared, PCM, 48000Hz, 64.0ms).
[INFO] [Audio] Started synchronous audio driver.
[INFO] [Microphone] Initialized microphone driver.
[INFO] [Display] Found display driver: "vulkan".
[INFO] [MIDI] Output device: "Microsoft GS Wavetable Synth".
[INFO] [Playlist] Loading favorites file: "D:\emulators\ES-DE\Emulators\RetroArch\playlists\builtin\content_favorites.lpl".
[INFO] [Playlist] Loading history file: "D:\emulators\ES-DE\Emulators\RetroArch\playlists\builtin\content_history.lpl".
[INFO] [Playlist] Loading history file: "D:\emulators\ES-DE\Emulators\RetroArch\playlists\builtin\content_image_history.lpl".
[INFO] [Playlist] Loading history file: "D:\emulators\ES-DE\Emulators\RetroArch\playlists\builtin\content_music_history.lpl".
[INFO] [Playlist] Loading history file: "D:\emulators\ES-DE\Emulators\RetroArch\playlists\builtin\content_video_history.lpl".
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\2048_libretro.dll"...
[INFO] [Core Updater] Core "2048" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\cap32_libretro.dll"...
[INFO] [Core Updater] Core "Amstrad - CPC/GX4000 (Caprice32)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fbalpha2012_cps1_libretro.dll"...
[INFO] [Core Updater] Core "Arcade (FB Alpha 2012 CPS-1)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fbalpha2012_cps2_libretro.dll"...
[INFO] [Core Updater] Core "Arcade (FB Alpha 2012 CPS-2)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fbalpha2012_neogeo_libretro.dll"...
[INFO] [Core Updater] Core "Arcade (FB Alpha 2012 Neo Geo)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mame2003_libretro.dll"...
[INFO] [Core Updater] Core "Arcade (MAME 2003)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\stella_libretro.dll"...
[INFO] [Core Updater] Core "Atari - 2600 (Stella)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\atari800_libretro.dll"...
[INFO] [Core Updater] Core "Atari - 400/800/600XL/800XL/130XE/5200 (Atari800)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\a5200_libretro.dll"...
[INFO] [Core Updater] Core "Atari - 5200 (a5200)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\handy_libretro.dll"...
[INFO] [Core Updater] Core "Atari - Lynx (Handy)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\hatari_libretro.dll"...
[INFO] [Core Updater] Core "Atari - ST/STE/TT/Falcon (Hatari)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\nxengine_libretro.dll"...
[INFO] [Core Updater] Core "Cave Story (NXEngine)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\puae2021_libretro.dll"...
[INFO] [Core Updater] Core "Commodore - Amiga (PUAE 2021)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\puae_libretro.dll"...
[INFO] [Core Updater] Core "Commodore - Amiga (PUAE)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\vice_x64_libretro.dll"...
[INFO] [Core Updater] Core "Commodore - C64 (VICE x64, fast)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\prboom_libretro.dll"...
[INFO] [Core Updater] Core "Doom (PrBoom)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\dosbox_pure_libretro.dll"...
[INFO] [Core Updater] Core "DOS (DOSBox-Pure)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\bluemsx_libretro.dll"...
[INFO] [Core Updater] Core "MSX/SVI/ColecoVision/SG-1000 (blueMSX)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mednafen_pce_fast_libretro.dll"...
[INFO] [Core Updater] Core "NEC - PC Engine / CD (Beetle PCE FAST)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mednafen_supergrafx_libretro.dll"...
[INFO] [Core Updater] Core "NEC - PC Engine SuperGrafx (Beetle SuperGrafx)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\gambatte_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - Game Boy / Color (Gambatte)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mgba_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - Game Boy Advance (mGBA)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\dolphin_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - GameCube / Wii (Dolphin)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fceumm_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - NES / Famicom (FCEUmm)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mupen64plus_next_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - Nintendo 64 (Mupen64Plus-Next)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\parallel_n64_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - Nintendo 64 (ParaLLEl N64)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\snes9x_libretro.dll"...
[INFO] [Core Updater] Core "Nintendo - SNES / SFC (Snes9x)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\xrick_libretro.dll"...
[INFO] [Core Updater] Core "Rick Dangerous (XRick)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\flycast_libretro.dll"...
[INFO] [Core Updater] Core "Sega - Dreamcast/Naomi (Flycast)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\picodrive_libretro.dll"...
[INFO] [Core Updater] Core "Sega - MS/GG/MD/CD/32X (PicoDrive)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\mednafen_saturn_libretro.dll"...
[INFO] [Core Updater] Core "Sega - Saturn (Beetle Saturn)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\yabasanshiro_libretro.dll"...
[INFO] [Core Updater] Core "Sega - Saturn (YabaSanshiro)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fuse_libretro.dll"...
[INFO] [Core Updater] Core "Sinclair - ZX Spectrum (Fuse)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\race_libretro.dll"...
[INFO] [Core Updater] Core "SNK - Neo Geo Pocket / Color (RACE)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\pcsx_rearmed_libretro.dll"...
[INFO] [Core Updater] Core "Sony - PlayStation (PCSX ReARMed)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\ppsspp_libretro.dll"...
[INFO] [Core Updater] Core "Sony - PlayStation Portable (PPSSPP)" is already at latest version.
[INFO] [Core Updater] Checking: "D:\emulators\ES-DE\Emulators\RetroArch\cores\ecwolf_libretro.dll"...
[INFO] [Core Updater] Core "Wolfenstein 3D (ECWolf)" is already at latest version.
[INFO] [Core] Using content: "D:\roms\zxspectrum\roms\Bomb Jack (1986)(Elite Systems).tap".
[INFO] [Core] Unloading core...
[INFO] [Core] Unloading core symbols...
[INFO] RetroArch 1.22.2 (Git f69da30)
[INFO] === Build =======================================
[INFO] CPU Model Name: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4 SSE42 AES AVX AVX2
[INFO] Version: 1.22.2
[INFO] Git: f69da30
[INFO] Built: May 26 2026
[INFO] =================================================
[INFO] [Input] Found input driver: "dinput".
[INFO] [Core] Loading dynamic libretro core from: "D:\emulators\ES-DE\Emulators\RetroArch\cores\fuse_libretro.dll".
[INFO] [Override] Core-specific overrides found at "D:\emulators\ES-DE\Emulators\RetroArch\config\Fuse\Fuse.cfg".
[INFO] [Config] Loading config: "D:\emulators\ES-DE\Emulators\RetroArch\retroarch.cfg".
[INFO] [Config] Appending override config: "D:\emulators\ES-DE\Emulators\RetroArch\config\Fuse\Fuse.cfg".
[INFO] [Override] Redirecting save file to "D:\emulators\ES-DE\Emulators\RetroArch\saves\Fuse\Bomb Jack (1986)(Elite Systems).srm".
[INFO] [Override] Redirecting save state to "D:\emulators\ES-DE\Emulators\RetroArch\states\Fuse\Bomb Jack (1986)(Elite Systems).state".
[INFO] [Environ] GET_VFS_INTERFACE. Core requested version >= V3, providing V4.
[INFO] [Environ] SET_SUPPORT_NO_GAME: yes.
[INFO] [Environ] GET_CORE_OPTIONS_VERSION.
[INFO] [Environ] SET_CORE_OPTIONS_V2.
[INFO] [Environ] SET_CONTROLLER_INFO.
[INFO] [Environ] GET_DISK_CONTROL_INTERFACE_VERSION.
[INFO] [Environ] SET_DISK_CONTROL_EXT_INTERFACE.
[INFO] [Remap] Core-specific remap found at "D:\emulators\ES-DE\Emulators\RetroArch\config\remaps\Fuse\Fuse.rmp".
[INFO] [Environ] GET_LOG_INTERFACE.
[libretro INFO] port 0 device 00000101
[libretro INFO] port 1 device 00000201
[libretro INFO] port 2 device 00000103
[INFO] [Content] Loading content file: "D:\roms\zxspectrum\roms\Bomb Jack (1986)(Elite Systems).tap".
[libretro INFO]
+------------------------------------------+
| FUSE-LIBRETRO |
| ____ _ _ ___ _ ____ |
| | __ ) | | | | |_ _| | | | _ \ |
| | _ \ | | | | | | | | | | | | |
| | |_) | | |_| | | | | |__ | |_| | |
| |____/ \___/ |___| |____| |____/ |
| |
| 5d792f6851804f14ccb4ef7a6a1047928ee09526 |
+------------------------------------------+
[INFO] [Environ] SET_PIXEL_FORMAT: RGB565.
[INFO] [Environ] SET_INPUT_DESCRIPTORS.
1 Like
ah, yeah, looks like that build is still from ~20 hrs ago. Let’s give it some time to build the latest updates.
Thanks for testing.
Seems there is a massive array of commits one after another now in fuse repository, probably pushed by Claude Code taking over the repository (?). Nothing bad with it but if it is so, Claude can go rogue mode altering things it shouldn’t (not given clear instructions just do “this”, don’t alter “this”), rendering the code useless after a certain point. Then end up endlessly hunting new bugs it introduced just to go back to a certain point it simply “worked”.
Yeah, we’ve been using LLMs to add VFS support, but also doing some audits of other aspects, and apparently this core had some questionable design choices, so libretroadmin worked on those at the same time.
Making a bunch of commits that touch a bunch of stuff is not my favorite way to deal with stuff, but once we get the initial pain out of the way, it should be in a better state.
Well yes, i used Claude Code on paid pro account to make an editor for an old retro console game that source was available (change levels etc) and while it was going really good, suddenly perhaps from some unclear instruction, went rogue and destroyed everything, didn’t have a backup so abandoned it lol. But it’s really capable on coding PC code. Very impressive stuff
AI is wonderful and useful because it helps you, but a contradiction arises when it comes to shaders. I am always right; I also believe you create many shaders using Claude Code on the paid Pro plan—is my assumption correct?
I cleaned up the squabblin’. Hopefully water under the bridge.
I haven’t found AI to be very useful for shader coding. It can help with algorithms at times, and for conceptualizing, but in my experience, the actual code tends to be naive and often has ugly results.
1 Like
I respect your perspective, especially since you’re sharing your experience without trying to dictate things to others. I’m not looking for any arguments; I believe in leaving space for everyone, as we all see the world in our own way. And everyone has the right, when they find something useful, to praise it and share their experience. The reason for my reply was to prove that criticism and pointing out mistakes to catch them is easy, but constructive dialogue is what ultimately yields results and benefits the community, whether through a shader or code. Criticism is not difficult, rather it is easy.
It’s all working on Android and Windows now, feel free to lock this thread as completed. Nothing else to say here.
1 Like
Meanwhile the screen mode output by core is not a proper ZX spectrum 360 x 288 but 320 x 288. So i was right when i looked in his PR, he only changed vertical 240 to 288. So expect new Issues reports that horizontal resolution is not the proper one. True ZX spectrum has around 48 pixels border left, and 48 pixels right… 256 + 48 + 48 = 352 at least. He is also creating a wrong pixel aspect ratio. I don’t understand why that PR was accepted without first discuss the issue and clarify things (this is not an attempt to start a new flame war). In any case i (think i) still have the PROPER fix on Linux, that was rejected.
Discuss here
If it still needs something, and you still have it handy, sure, send it over and we’ll get it merged. Sorry for the hassle.
I think he"s only talking about the overscan area which no games/demos use because it was out of view on a CRT back in the day. It’s the same on Spectaculator. The main screen is 256x192 correct aspect and the rest is border area. I’ve tested some games/demos that use the border area and they work/look fine and in sync. Try the second part of the MDA demo for example, it has a scrolling message in the border area. I"m not sure what"s trying to be achieved here ?
Even though i already posted links to proper ZX Spectrum mode, here is proof, resized the real CRT image so that playable area is 256 x 192, A real ZX Spectrum will output ~360 x 288 and visible around 340 x 260 (marked on image) so you lose around 20 pixels both horizontal and vertical (~10 pixels not visible in each border)
360 : 288 = 1.25
340 : 260 = 1.31 aspect close to a CRT
faulty/inaccurate PR merged:
320 : 288 = 1.11 = stretched graphics on CRT not faithful to the original. A CRT will always be 4 : 3 = 1.333
1 Like