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Ymir Git (2026/06/05) is a work-in-progress Sega Saturn emulator with various features, including support for BIN+CUE, IMG+CCD, MDF+MDS, or ISO files, automatic BIOS detection, and region switching. It accommodates two players with customizable keybindings, offers backup RAM management, and provides save states with a rewind function. The emulator’s changelog notes optimizations to the SH2 processor, fixes for cycle counts, and the addition of a Message History window. Enhanced debugging capabilities include simplified watchpoints and actions to reload save states. Download is available from the specified source.
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Ymir Git (2026/06/05) has been released. It’s an ongoing project for a Sega Saturn emulator.
Key Features:
Load games from BIN+CUE, IMG+CCD, MDF+MDS, or ISO formats
Automatic detection of IPL (BIOS) ROM
Seamless region switching
Supports up to two players with standard Control Pads on both ports (more to be added)
Fully adjustable keybindings
Support for RAM and DRAM cartridges (additional features coming soon)
Built-in memory manager for importing and exporting saves, along with RAM transfers
Save states functionality
Rewind capability (up to one minute at 60 fps), turbo speed, and frame stepping (both directions)
A feature-rich debugger in development
Ymir Changelog:
* chore: Updated CHANGELOG
* perf(SH2): Microoptimization of DIV1 instruction
* perf(SH2): Direct opcode argument decoding in instruction handlers
* fix(SH2): Adjusted cycle counts for multiplication instructions
* feat(SH2): WB register storage in save state
* feat(SH2): WB/EX stall handling
* fix(SH2): TAS.B cycle timing correction
* fix(SH2): Corrected STC.L cycle counts
* feat(SH2): RMW cycle counting setup for TAS.B
* chore(SH2): Streamlined stack tracing functions
* fix(VDP1): Corrected processing of COPR, branching, and illegal commands
* perf(debug): Clipped data/call stack lists
* feat(app): Introduced Message History window, accommodating up to 10,000 messages
* feat(debug): Simplified SH2 watchpoints to basic read/write toggles per byte
* feat(app): Added the option to reload save states from disk within the File menu
