Ymir v0.3.1 is released. A work-in-progress Sega Saturn emulator.

Features:
Load games from BIN+CUE, IMG+CCD, MDF+MDS or ISO files
Automatic IPL (BIOS) ROM detection
Automatic region switching
Up to two players with standard Control Pads on both ports (more to come)
Fully customizable keybindings
Backup RAM and DRAM cartridges (more to come)
Integrated backup memory manager to import and export saves, and transfer between internal and cartridge RAM
Save states
Rewinding (up to one minute at 60 fps), turbo speed, frame step (forwards and backwards)
A work-in-progress feature-rich debugger

Ymir Changelog:
New features and improvements
Debugger: Add Priority Stack to VDP2 debug overlay.
VDP2: Various performance optimizations to the software renderer, improving performance in graphics-bound games (especially in high resolution modes). Technical details:
RBG1 was being unnecessarily rendered when NBG0 was enabled and RBG1 was disabled
Remove redundant transparency bit since priority zero acts as transparency
Remove various unused function arguments, reducing CPU register and stack pressure
Pass down VDP2 register references as arguments rather than fetching them from scratch everywhere
Reuse line data (i.e. skip recomputing lines) when rendering vertical mosaic
Bit-pack character pattern data in a single 32-bit value
Microoptimize scroll coordinates calculations
Rotation parameter table calculations:
Specialize calculations for (1) no coefficient table, (2) per-line coefficient table and (3) per-dot coefficient table
Hoist coefficient table enable and per-dot coefficients checks out of the loop
Make the inner loops SIMD-friendly
Avoid unnecessary computation of transparency and line color screen data if they are disabled
Microoptimizations to the compositor function:
Layer sorting now uses a combined key
Gather layer data in one single loop
Pixel fetching is now templatized and some bail out checks are done earlier
Color offset calculation enable flag is cleared in the fetch loop if no offset is actually applied
Fixes
Debugger: Various SH2 stack analysis fixes.
Game DB: Add slow VDP1 flag to Funky Fantasy to fix slow FMVs.
Media: Detect postgaps in data tracks when the CUE sheet doesn't explicitly announce them. Fixes audio track shifts in bad Virtua Fighter 2 dumps.
Media: Fix PREGAP/POSTGAP handling in CUE/BIN dumps. Fixes shifted audio tracks in games dumped with ImgBurn.
SH2: Fix illegal slot instruction exception handling. (thanks to @celeriyacon)
VDP1: Add game-specific flag for skipping command processing if the top of the table is empty. Enable it exclusively for Sekai no Shasou kara - I Swiss-hen - Alps Tozantetsudou no Tabi. Fixes missing graphics in Gungriffon. (#810)
VDP1: Disable early polygon drawing termination when rendering polygons when user clipping mode is inverted. Fixes clipped polygons around the minimap in Machine Head (#767).
VDP1: Implement simple infinite loop detection. Fixes slowdown in the Mojave Desert stage (1-2) in Gale Racer.
VDP2: Apply color calculations to transparent sprite mesh on layer 0. Fixes stripes on ground plane in Gungriffon.
VDP2: Apply color offset to transparent sprite mesh on layer 0 in a separate step. Fixes missing spotlight in the Colonel battle in Mega Man X4. (#818)
VDP2: Fix VRAM access calculations when RBG1 is enabled. Fix missing car graphics regression in Gale Racer. (#359)
VDP2: Fix and use line color screen calculation ratio when LNCL is inserted. Fixes text background issues in Doukoku Soshite. (#502)

Download: Ymir v0.3.1
Source: Here