SSF CHD Patcher + M3U Multi-Disc Support

Play Sega Saturn CHD files in SSF emulator with automatic multi-disc game support and hotswap feature. Good for LaunchBox and arcade cabinets with low-spec hardware.

Compatibility

Mostly for SSF_R16, but will be compatible with SSF_012_beta_R4 and partially with SSF_011_alpha_R5'' (but not lower then this).
Can be compatible with versions newer then SSF_R16 but not tested. The proper HotSwap feature currently availible only for SSF_012_beta_R4

What This Does

• Load CHD disc images directly in SSF
• Play multi-disc games (Sakura Taisen, Panzer Dragoon Saga, Shining Force III) with easy disc swapping
• Press Page Down/Page Up to switch discs - no menus needed

Quick Setup

1. Put these files in your SSF folder:

   • SSFHelper.exe
   • ssf_patch.dll
   • libchd.dll

2. Run: SSFHelper.exe "game.chd"

Multi-Disc Games (M3U)

Create a text file named game.m3u:

Disc 1.chd
Disc 2.chd  
Disc 3.chd

Launch: SSFHelper.exe "game.m3u"

During Gameplay

When game asks for next disc:

1. Press Page Down (switches to next disc internally)
2. Press F1 (opens tray in SSF)
3. Press F2 (closes tray)
4. Keep playing!

Hotkeys:

• Page Down = Next disc
• Page Up = Previous disc

Why Antivirus May Flag This

This uses DLL injection to add features to SSF, which antivirus software sometimes flags as suspicious. It's a false positive - the same technique used by ReShade, ENB, and other game mods. Source code is fully available for inspection.

Files

• SSFHelper.exe - Loader that patches SSF
• ssf_patch.dll - Main CHD/SCSI emulation
• libchd.dll - CHD reading library

Credits

• Original CHD patch: batteryshark/chdssf
• M3U multi-disc support: Added in this fork

Why It Works

SSF expects a physical CD-ROM drive with SCSI commands. This patch creates a virtual drive that speaks SCSI but reads from CHD files.

License

This project is licensed under the BSD 3-Clause License (same as libchdr).

Third-Party Components

• libchdr: BSD 3-Clause License - CHD decompression library from MAME project
• Original chdssf: No license specified - CHD hook concept by batteryshark
• M3U multi-disc support: Original addition by this fork