KytyPlus est un fork de KytyPS5, lui-même dérivé du projet original Kyty. Il reprend son émulation de la PlayStation 5 tout en ajoutant plusieurs améliorations, notamment le support expérimental des jeux PS4 via shadPS4, le FSR 1.0, un cache Vulkan permettant de conserver les pipelines compilés et différentes optimisations destinées aux GPU intégrés (iGPU). Il permet également l’installation des fichiers PKG depuis son interface et propose une gestion unifiée des jeux PS4 et PS5. Le projet est encore en développement et de nombreux jeux peuvent rencontrer des plantages, des écrans noirs ou des problèmes graphiques.
Les changements:
Highlights
– Four KytyPS5 upstream syncs since v4.3, reconciled without losing any KytyPlus features.
– First release in which the launcher successfully starts games again.
– Cheats: remote catalog, Local/Remote dialog, `.shn` import and file picker.
– Performance improvements: reduced renderer synchronisation and allocation overhead.
– DLC support, including mountable content with actual game data.
– Astro Bot now boots past its previously failing shader compilation stage.
– Large batch of shader accuracy improvements from upstream.
Cheats
– Added remote cheat catalog browsing and importing, with per-title and per-version filtering.
– Added Local/Remote dialog: import cheats into Local, select the desired mods and click Apply.
– Added support for `.shn` (ShenJS trainer XML), automatically converted into the mods plan so the emulator only handles a single format.
– Added a **Select file…** button to the Local tab to load cheat files from any location. Files are validated, converted and installed as `_Patches.json`.
– `.mc4` files remain unsupported because upstream publishes them in encrypted form.
Games and content
– Added add-on (DLC) support (#1519).
– Added mountable-content DLC with actual content (#1581).
– Localised trophy notifications using embedded JSON catalogs and made toast duration configurable from 5 to 10 seconds (#1538).
– Enabled `snd0.at9` playback during the startup splash screen (#1545).
– Implemented NGS2 lock/unlock.
– Added vectored writes for profile index saves.
– Added path-based truncation for replay files.
Performance
– Reduced renderer synchronisation and allocation overhead.
– Fixed fixed-refresh VRR status reporting.
– Ported entitlement requests.
– Added verified pattern-fill recognition to the shader recompiler.
Shader and loader accuracy
– Fixed float inline constant reads to use the correct width for 16-bit and 64-bit operands (#1582, #1576).
– Preserved quiet-NaN payload bits outside the packed f16 min/max signalling-NaN path (#1579).
– Fixed f32 clamp behaviour so that NaN values become 0.
– Fixed `DS_CMPST_RTN_B32` to return a 32-bit LDS compare-exchange (#1578).
– Added 64-bit buffer atomic addition support via `BUFFER_ATOMIC_ADD_X2`.
– Added native half conversion for `v_cvt_pkrtz_f16_f32`, used by GTA V (#1520).
– Ensured the front-face input format is honoured.
– Preserved RDNA2 DLC coherence for flat address loads.
– Fixed the loader to preserve the caller’s flags in TLS stubs (#1571).
– Preserved game output and logs across `LoadExec` relaunches (#1480).
Stability fixes
– Fixed the launcher failing to start games. Seven command-line flags it emits were not parsed: `–hdr`, `–hide-cursor`, `–tessellation`, `–network-connected`, `–sync-raw-image-buffers`, `–trophy-notifications` and `–skip-notice-screen`. Every launch therefore exited immediately with an unknown-option error, although the launcher reported success.
– Fixed Astro Bot (PPSA21567) aborting during its `TileBasedLighting` compute shader. Unbound SRT descriptor reads now return zero instead of triggering a fault.
– Restored five network entry points and the `Usbd` and `WebBrowserDialog` export tables, which had stopped registering silently.
– Restored macOS build compatibility. Since the floating-point `std::from_chars` overload is unavailable before macOS 26, argument parsing now uses a validated `strtof` path.
– Restored `KernelHandleReservedRangeAccessViolation`.
– Fixed merged CMake configuration and Linux SDL dependencies.
Build and CI
– Removed test executable compilation and execution from CI, reducing the workload of each job.
– Bundled shadPS4 from the latest upstream prebuilt release instead of compiling it from source.
Known issues
– Astro Bot reaches its splash screen but then stalls while waiting on a guest thread, so it is not yet playable.
– `.mc4` cheats are unsupported.
– Upstream’s `–amd-cpu` instruction patching has not been integrated into the KytyPlus loader path.
