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Ymir Git (2026/06/25) is a work-in-progress Sega Saturn emulator that supports loading games from various file formats, automatic BIOS detection, and region switching. It allows for up to two players, customizable keybindings, and has features for managing backup RAM and DRAM cartridges. Key functionalities include save states, rewinding, turbo speed, and a frame step option. The latest update fixes various issues, enhances performance, and updates documentation regarding Virtua Gun fixes. Notable bug fixes include corrections for VDP1, debug synchronization, and input settings. Download is available as Ymir Git (2026/06/25).
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Ymir Git (2026/06/25) has been released. It’s an ongoing development of a Sega Saturn emulator.
Features:
Load games from BIN+CUE, IMG+CCD, MDF+MDS, or ISO files
Automatic detection of IPL (BIOS) ROM
Automatic region adjustments
Supports up to two players using standard Control Pads on both ports (more features incoming)
Fully customizable key bindings
Backup RAM and DRAM cartridge support (with more to come)
Integrated memory manager for importing/exporting saves and transferring between internal and cartridge RAM
Save states
Rewinding capability (up to one minute at 60 fps), turbo speed, and frame stepping (forwards and backwards)
A feature-rich debugger currently in progress.
Ymir Changelog:
* fix(VDP1): Textured sprites with CMDSIZE.H=0 no longer fetch additional texels
* fix(debug): Avoid syncing VDP1 FBRAM during debug reads
* fix(bup): Prevent crash when loading a backup RAM cartridge with the default path
* perf(SH2): Additional micro-optimizations for interrupt flags
* fix(input): Ensure all mice are released when rebinding all inputs
* docs: Update CHANGELOG with Virtua Gun fixes
* fix(SMPC): Refresh peripheral PDR1/2 registers during reads and EXLE updates
* fix(VDP2): Correct coordinate latching via external latch
* fix(settings): Adjust CD Block LLE setting using tweak presets
* chore(SH2): Employ `std::bit_cast` for interrupt checks
